                                                                                                                          User's Guide
                                                                                                                SBOU172 – September 2016


      OPA1622EVM SoundPlus™ Audio Operational Amplifier
                                    Evaluation Module




        This user's guide contains information for the OPA1622 as well as support documentation for the
        OPA1622 evaluation module (EVM). Included are the performance specifications, set-up procedure,
        modifications, measured data, printed circuit board (PCB) layout, schematic, and bill of materials (BOM) of
        the OPA1622EVM.

                                                                       Contents
        1       Introduction ................................................................................................................... 2
        2       Performance Specification Summary ..................................................................................... 2
        3       Modifications.................................................................................................................. 3
                3.1    Gain................................................................................................................... 3
                3.2    Cutoff Frequency.................................................................................................... 4
                3.3    Phase Shift .......................................................................................................... 4
        4       Test Setup and Results ..................................................................................................... 4
                4.1    Power Supply Connections ........................................................................................ 5
                4.2    Input Connections .................................................................................................. 5
                4.3    Output Connections ................................................................................................ 5
                4.4    Enable ............................................................................................................... 5
                4.5    THD+N vs. Frequency ............................................................................................. 6
                4.6    THD+N vs. Amplitude .............................................................................................. 7
                4.7    Fast Fourier Transforms ........................................................................................... 8
        5       Board Layout ................................................................................................................ 10
                5.1    Layout ............................................................................................................... 10
        6       Schematic, Bill of Materials, and Reference ............................................................................ 12
                6.1    Schematic .......................................................................................................... 12
                6.2    Bill of Materials .................................................................................................... 13
SoundPlus is a trademark of Texas Instruments.
All other trademarks are the property of their respective owners.

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                  6.3      Reference .......................................................................................................... 13

                                                                     List of Figures
       1          OPA1622EVM Schematic .................................................................................................. 3
       2          Power Supply Connections ................................................................................................. 5
       3          THD+N vs. Frequency for a 32-Ω Load .................................................................................. 6
       4          THD+N vs. Frequency for a 16-Ω Load................................................................................... 6
       5          THD+N vs. Amplitude for a 32-Ω Load ................................................................................... 7
       6          THD+N vs. Amplitude for a 16-Ω Load ................................................................................... 7
       7          FFT of Left Channel With a 32-Ω Load ................................................................................... 8
       8          FFT of Right Channel with a 32-Ω Load .................................................................................. 8
       9          FFT of Left Channel With a 16-Ω Load ................................................................................... 9
       10         FFT of Right Channel With a 16-Ω Load ................................................................................. 9
       11         Top Layer PCB Layout .................................................................................................... 10
       12         Bottom Layer PCB Layout ................................................................................................ 11
       13         OPA1622EVM Schematic ................................................................................................. 12

                                                                     List of Tables
       1          OPA1622EVM Measured Performance Summary ...................................................................... 2
       2          OPA1622EVM Bill of Materials ........................................................................................... 13


1      Introduction
       The OPA1622 is a high-performance, bipolar-input SoundPlus™ audio operational amplifier. For a full list
       of electrical characteristics of the OPA1622, please refer to the OPA1622 product datasheet (SBOS727).

2      Performance Specification Summary
       A summary of the OPA1622EVM performance specifications is provided in Table 1. Specifications are
       given for a supply voltage of Vs = ±5 V and at an ambient temperature of 25°C, unless otherwise noted.

                                       Table 1. OPA1622EVM Measured Performance Summary
                          Specification                                       Test Conditions                        Measured Performance
               Total Harmonic Distortion Plus Noise        VIN = 1 Vrms, Load = 32 Ω, Measurement Bandwidth                 –108.10 dB
                        (THD+N) at 1 kHz                                        = 90 kHz
                        THD+N vs. at 1 kHz                 VIN = 1 Vrms, Load = 16 Ω, Measurement Bandwidth                 –107.8 dB
                                                                                = 90 kHz
                Second Harmonic – Left Channel                   VIN = 1 Vrms, Load = 32 Ω, Fin = 1 kHz                    –125.45 dBV
                Second Harmonic – Right Channel                  VIN = 1 Vrms, Load = 32 Ω, Fin = 1 kHz                    –126.90 dBV
                Second Harmonic – Left Channel                   VIN = 1 Vrms, Load = 16 Ω, Fin = 1 kHz                    –120.25 dBV
                Second Harmonic – Right Channel                  VIN = 1 Vrms, Load = 16 Ω, Fin = 1 kHz                    –120.68 dBV




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www.ti.com                                                                                                                          Modifications

3      Modifications
       This EVM is designed to provide access to the features of and measure the performance of the OPA1622.
       Modifications of the OPA1622EVM can be made and include; adjusting the gain, phase shift, and cut-off
       frequency. The schematic of the OPA1622EVM is displayed in Figure 1. For a full schematic of the
       OPA1622EVM, see Figure 13.
                                                                                  C1 (C3)



                                                R1 (R5)                            R2 (R6)
                                 IN>



                    Left Channel Input
                  (Right Channel Input)

                                                                                                             Left Channel Output
                                                                               OPA1622
                                                R3 (R7)                                                    (Right Channel Output)
                                IN+

                                                              R4         C2
                                                             (R8)       (C4)

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                                                 Figure 1. OPA1622EVM Schematic


3.1    Gain
       Equation 1 and Equation 2 display the transfer function of the circuit shown in Figure 1.
                                            R4      æ    R ö              æR           ö
             V Left ChannelOutput =               ´ ç 1 + 2 ÷ ´ (IN + ) - ç 2 ´ (IN -) ÷
                                          R3 + R 4 è     R1 ø             è R1         ø                                                      (1)
                                             R8     æ    R ö              æR           ö
             V Right ChannelOutput =              ´ ç 1 + 6 ÷ ´ (IN + ) - ç 6 ´ (IN -) ÷
                                           R7 + R8 è     R5 ø             è R5         ø                                                      (2)
       Most applications require the left and right channel to be balanced. Balancing the outputs is accomplished
       by setting R2 = R4 = R6 = R8 and R1 = R3 = R5 = R7. This simplifies Equation 1 and Equation 2 into
       Equation 3.
                                                          R
            V Left ChannelOutput = V Right ChannelOutput = 2 ´ ((IN + ) - (IN -) )
                                                          R1                                                    (3)
       If the channels require unbalanced gain, the gain of each channel can be calculated using Equation 4 and
       Equation 5.
                                R
             Gain Left Channel = 2
                                R1
             given
                  •    R2 = R4 and R1 = R3                                                                                                    (4)
                                          R6
             Gain Right Channel =
                                          R5
             given
                  •    R6 = R8 and R5 = R7                                                                                                    (5)




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Modifications                                                                                                    www.ti.com

3.2    Cutoff Frequency
       This EVM provides the ability to filter the output of the OPA1622. The cutoff frequency of the filter can be
       calculated using Equation 6 and Equation 7.
                               1
             fc - left =
                         2p ´ R2 ´ C1
                given
                     •   R2 = R4, R1 = R3, and C1 = C2                                                                    (6)
                                   1
                fc - right =
                             2p ´ R 6 ´ C3
                given
                     •   R6 = R8, R5 = R7, and C3 = C4                                                                    (7)

3.3    Phase Shift
       The phase shift, θ, is calculated using Equation 8.
                            æ f ö
                Q = - tan-1 ç ÷
                            è fc ø
                where
                     •   ƒ is the maximum frequency of interest within the audio band
                     •   ƒc is the cutoff frequency discussed in Section 3.2                                              (8)

4      Test Setup and Results
       This section describes how to properly connect, set up, and use the OPA1622EVM. This section also
       includes measured data of the OPA1622EVM to display typical performance of the OPA1622EVM.
       Measurements include:
       • THD+N vs. Frequency for a 32- and 16-Ω load
       • THD+N vs. Amplitude for a 32- and 16-Ω load
       • Fast-Fourier Transform (FFT) for a 32- and 16-Ω load
       The THD+N vs. Frequency, THD+N vs. Amplitude, and FFT measurements were taken using an Audio
       Precision APx555. All measurements were taken using ±5-V supplies at an ambient temperature of 25 °C,
       unless otherwise noted.




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4.1    Power Supply Connections
       The power supply connections for the OPA1622EVM are provided through the use of connector J4
       located at the top of the EVM. The positive power supply connection is labeled VCC, the negative power
       supply connection is labeled VEE, and the ground connection is labeled GND. To connect power to the
       OPA1622EVM, insert wires into each terminal of J4 and then tighten the screws to make the connection.
       Figure 2 displays the proper way to connect power to the OPA1622EVM. For the minimum and maximum
       supply voltages of the OPA1622EVM, please refer to the OPA1622 product datasheet (SBOS727).




                                     Figure 2. Power Supply Connections


4.2    Input Connections
       Signals for the left channel and right channel input are applied to the OPA1622EVM through the use of
       connectors J1 and J3, respectively. Connect wires to J1 and J3 to provide an input signal from a source
       such as an audio analyzer or audio digital-to-analog converter (DAC). The positive input from the source
       connects to the pin labeled IN+ (upper pin), the negative input from the source connects to the pin labeled
       IN– (lower pin), and the ground connection from the source connects to the center pin of J1 and J3.

4.3    Output Connections
       Output connections are provided through the use of the audio jack, J2, and two test points labeled Left
       Channel and Right Channel near the bottom of the OPA1622EVM. The audio jack provides a way to
       connect headphones or a resistive load to the output of the OPA1622 while testing the performance of the
       OPA1622EVM. Test points labeled Left Channel and Right Channel provide a connection to measure the
       performance of the left and right channels of the OPA1622EVM.

4.4    Enable
       Jumper J5 provides access to the enable pin of the OPA1622. Placing a shunt across J5 disables the
       OPA1622 by grounding the enable pin. When the enable pin is grounded, a current will flow through R9 to
       ground which is much larger than the shutdown current of the OPA1622. Removing the shunt across J5
       enables the OPA1622 by pulling the enable pin up to VCC through resistor R9. Note that voltages up to
       VCC can be applied to the enable pin of the OPA1622. External sources can be applied to the enable pin
       by removing the shunt and resistor R9 and connecting an external source to the pin of J5 labeled EN.




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4.5                                         THD+N vs. Frequency
                                            For all THD+N vs. Frequency measurements, the input signal frequency was swept from 20 Hz to 20 kHz
                                            and had an amplitude of 1 Vrms on the output of the OPA1622 with the measurement bandwidth of the
                                            Audio Precision set to 90 kHz. A small variation in the THD+N performance between amplifier channels is
                                            normal. Figure 3 shows the THD+N vs. Frequency for a 32-Ω load.
                                            0.1                                                                                                          -60




                                                                                                                                                                Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (%)




                                           0.01                                                                                                          -80




                                          0.001                                                                                                          -100




                                         0.0001                                                                                                          -120


                                                                                                                                      Left Channel

                                                                                                                                      Right Channel
                                        0.00001                                                                                                          -140
                                                  20                            200                                      2000                        20000
                                                                                               Frequency (Hz)
                                                                                                                                                                                                         C001



                                                                       Figure 3. THD+N vs. Frequency for a 32-Ω Load

                                            Figure 4 shows the THD+N vs. Frequency for a 16-Ω load.

                                            0.1                                                                                                          -60




                                                                                                                                                                Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (%)




                                           0.01                                                                                                          -80




                                          0.001                                                                                                          -100




                                         0.0001                                                                                                          -120


                                                                                                                                      Left Channel

                                                                                                                                      Right Channel
                                        0.00001                                                                                                          -140
                                                  20                            200                                      2000                        20000
                                                                                               Frequency (Hz)
                                                                                                                                                                                                         C002



                                                                       Figure 4. THD+N vs. Frequency for a 16-Ω Load




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4.6                                         THD+N vs. Amplitude
                                            For all THD+N vs. Amplitude measurements, the output amplitude was swept from 10 mVrms to 3 Vrms at
                                            a frequency of 1 kHz. The measurement bandwidth of the Audio Precision was set to 22 kHz. Note that
                                            power supply voltages larger than ±5 V may cause the output of the OPA1622 to clip at a lower output
                                            amplitude than what is shown in the measurements because the increased power dissipation in the
                                            amplifier will trigger the thermal protection circuitry. See the OPA1622 product datasheet (SBOS727),
                                            Applications section for information on calculating power dissipation. Figure 5 shows the THD+N vs.
                                            Amplitude for a 32-Ω load.

                                            0.1                                                                                                     -60




                                                                                                                                                           Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (%)




                                           0.01                                                                                                     -80




                                          0.001                                                                                                     -100




                                         0.0001                                                                                                     -120


                                                                                                                                    Left Channel

                                                                                                                                    Right Channel
                                        0.00001                                                                                                     -140
                                               0.01                                 0.1                                      1
                                                                                          Frequency (Vrms)
                                                                                                                                                                                                    C003



                                                                   Figure 5. THD+N vs. Amplitude for a 32-Ω Load

                                            Figure 6 shows the THD+N vs. Amplitude for a 16-Ω load.

                                            0.1                                                                                                     -60




                                                                                                                                                           Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (%)




                                           0.01                                                                                                     -80




                                          0.001                                                                                                     -100




                                         0.0001                                                                                                     -120


                                                                                                                                    Left Channel

                                                                                                                                    Right Channel
                                        0.00001                                                                                                     -140
                                               0.01                                 0.1                                      1
                                                                                          Frequency (Vrms)
                                                                                                                                                                                                    C004



                                                                   Figure 6. THD+N vs. Amplitude for a 16-Ω Load



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4.7   Fast Fourier Transforms
       For all FFT measurements, a frequency of 1 kHz and amplitude of 1 Vrms on the output was used. The 1
       Vrms fundamental corresponds to 0 dBV in all FFT measurements. Figure 7 shows an FFT of the left
       channel with a 32-Ω load. The second harmonic was measured to be –125.45 dBV.
                          0


                         -20


                         -40


                         -60
      Amplitude (dBV)




                         -80


                        -100               í     G%9 6HFRQG +DUPRQLF

                        -120


                        -140


                        -160


                        -180
                               0   2000   4000     6000        8000        10000        12000        14000   16000    18000     20000
                                                                       Frequency (Hz)
                                                                                                                                    C005



                                           Figure 7. FFT of Left Channel With a 32-Ω Load

       Figure 8 shows an FFT of the right channel with a 32-Ω load. The second harmonic was measured to be
       –126.90 dBV.
                          0


                         -20


                         -40


                         -60
      Amplitude (dBV)




                         -80


                        -100               í     G%9 6HFRQG +DUPRQLF

                        -120


                        -140


                        -160


                        -180
                               0   2000   4000     6000        8000        10000        12000        14000   16000    18000     20000
                                                                       Frequency (Hz)
                                                                                                                                    C006



                                          Figure 8. FFT of Right Channel with a 32-Ω Load




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       Figure 9 shows an FFT of the left channel with a 16-Ω load. The second harmonic was measured to be
       –120.25 dBV.
                           0


                          -20


                          -40


                          -60
       Amplitude (dBV)




                          -80


                         -100               í     dBV (Second Harmonic)

                         -120


                         -140


                         -160


                         -180
                                0   2000   4000     6000        8000        10000       12000         14000   16000     18000     20000
                                                                       Frequency (Hz)
                                                                                                                                      C007



                                            Figure 9. FFT of Left Channel With a 16-Ω Load

       Figure 10 shows an FFT of the right channel with a 16-Ω load. The second harmonic was measured to be
       –120.68 dBV.
                           0


                          -20


                          -40


                          -60
       Amplitude (dBV)




                          -80


                         -100               í     dBV (Second Harmonic)

                         -120


                         -140


                         -160


                         -180
                                0   2000   4000     6000        8000        10000       12000         14000   16000     18000     20000
                                                                       Frequency (Hz)
                                                                                                                                      C008



                                           Figure 10. FFT of Right Channel With a 16-Ω Load




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Board Layout                                                                                                 www.ti.com

5     Board Layout
      This section provides a description of the OPA1622EVM board layout and layer illustrations.

5.1   Layout
      The board layout for the OPA1622EVM is shown in Figure 11 and Figure 12. The top layer consists of all
      signal traces and is poured with a solid ground plane. The traces of the positive input (IN+) and negative
      input (IN–) for both the left and right channel were kept as balanced as possible to eliminate any
      impedance mismatch due to trace impedance. The decoupling capacitors, C5 and C6, were positioned as
      close as possible to the power supply pins of the device. Vias were placed at the ground connection of
      every component to provide a low impedance path on the bottom layer back to the supply ground. It is
      important to provide a very clean, low impedance return path for the audio jack (J2); therefore multiple
      stitching vias were placed around the ground connection of the audio jack. Also, the connection to the
      thermal pad of the OPA1622 on the bottom layer was kept to a minimum to ensure currents from the
      audio jack ground to the supply ground have a clean return path. Note that due to the size of the copper
      pour for the thermal pad on the bottom layer, the thermal performance specified in the OPA1622
      datasheet may not be met on the OPA1622EVM. Refer to the application report, PowerPAD™ Thermally
      Enhanced Package (SLMA002), for more information.




                                         Figure 11. Top Layer PCB Layout




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                                Figure 12. Bottom Layer PCB Layout




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Schematic, Bill of Materials, and Reference                                                                                                                                                             www.ti.com

6       Schematic, Bill of Materials, and Reference
        This section contains the schematics, the bill of materials, and a list of reference documents.

6.1     Schematic
        Figure 13 illustrates the EVM schematics.
                                                                                        C1


                                                                                        100pF
                                                                                                                                                                                     VEE
                                               R1                                       R2
                                               1.00k                                    1.00k


                                  J1                                              VEE
                                           3                                              C6                                                                                               C7
                                           2                                                                                                                   J4                          10µF
                                           1                                                                                                                        3
                                                                                          0.1µF                                       Supply Voltage:               2




                                                                                  11
                      Left Channel Input                                                          GND                                 Minimum = 4V (+/-2V)          1




                                                                                  4

                                                                                        3
                                                 GND                                                                                  Maximum = 36V (+/-18V)
                                                                             10                                                                                                                   GND
                                                                                   V-        9
                                                                                                                      Left Channel                                                         C8
                                               R3                            1     V+                                                                                                      10µF
                                                                                                                        TP1
                                               1.00k                                    U1A
                                                                             8          OPA1622IDRCR                  GND




                                                                                   2
                                                                                                                          TP2
                                                                                          C5
                                                                                                                                                                                     VCC
                                                        R4      C2
                                                        1.00k   100pF                     0.1µF
                                                                                  VCC             GND               GND




                                                       GND


                                                                                                                          2    J2
                                                                                                                          3
                                                                                                                          1


                                                                                          C3
                                                                                                                                                                             VCC
                                                                                                                    GND
                                                                                          100pF

                                               R5                                         R6                                                                                     R9
                                               1.00k                                      1.00k                                                                                  10.0k


                                  J3                                                                                                                                    J5
                                           3                                                                                                                                 2
                                                                                                                                                                                              SD
                                           2                                                                                                                                 1
                                           1
                                                                                  11




                    Right Channel Input                                                          GND
                                                                                  4

                                                                                        3




                                                 GND
                                                                             6
                                                                                   V-        7                      Right Channel                                            GND
                                               R7                            5     V+
                                                                                                                      TP3
                                               1.00k                                    U1B
                                                                             8          OPA1622IDRCR                GND
                                                                        SD
                                                                                   2




                                                                                                                         TP4

                                                        R8      C4
                                                        1.00k   100pF                                              GND




                                                       GND                                                                                        Copyright © 2016, Texas Instruments Incorporated


                                                                                  Figure 13. OPA1622EVM Schematic

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6.2    Bill of Materials
       Table 2 lists the EVM BOM.

                                                  Table 2. OPA1622EVM Bill of Materials
        Designator    QTY   Value   Description                                     Package Reference         Part Number            Manufacturer
        PCB            1            Printed-Circuit Board                                                     PA031                  Any
        C1, C2, C3,    4    100pF   CAP, CERM, 100pF, 50V, +/-1%, C0G/NP0,          0603                      06035A101FAT2A         AVX
        C4                          0603
        C5, C6         2    0.1uF   CAP, CERM, 0.1uF, 16V, +/-5%, X7R, 0603         0603                      0603YC104JAT2A         AVX
        C7, C8         2    10uF    CAP, CERM, 10uF, 50V, +/-10%, X5R,              1206_190                  CGA5L3X5R1H106K160AB   TDK
                                    1206_190
        H1, H2, H3,    4            Bumpon, Cylindrical, 0.312 X 0.200, Black       Black Bumpon              SJ61A1                 3M
        H4
        J1, J3         2            Header, 100mil, 3x1, Tin, TH                    Header, 3 PIN, 100mil,    PEC03SAAN              Sullins Connector
                                                                                    Tin                                              Solutions
        J2             1            Audio Jack, 3.5mm, Stereo, R/A, SMT             Audio Jack SMD            SJ-3523-SMT            CUI Inc,
        J4             1            Terminal Block, 3.5mm Pitch, 3x1, TH            10.5x8.2x6.5mm            ED555/3DS              On-Shore Technology
        J5             1            Header, 100mil, 2x1, Tin, TH                    Header 2x1                90120-0122             Molex
        R1, R2, R3,    8    1.00k   RES, 1.00 k, 0.1%, 0.1 W, 0603                  0603                      RT0603BRB071KL         Yageo America
        R4, R5, R6,
        R7, R8
        R9             1    10.0k   RES, 10.0k ohm, 1%, 0.1W, 0603                  0603                      CRCW060310K0FKEA       Vishay-Dale
        SH-J1          1     1x2    Shunt, 100mil, Gold plated, Black               Shunt                     969102-0000-DA         3M
        TP1, TP2,      4            Test Point, Miniature, SMT                      Test Point, Miniature,    5019                   Keystone
        TP3, TP4                                                                    SMT
        U1             1            SoundPlus High-Fidelity, Bipolar-Input, Audio   DRC0010J                  OPA1622IDRCR           Texas Instruments
                                    Operational Amplifier, DRC0010J




6.3    Reference
       •     OPA1622 SoundPlus™ High-Fidelity, Bipolar-Input, Audio Operational Amplifier datasheet (SBOS727)
       •     PowerPAD™ Thermally Enhanced Package (SLMA002)




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                           STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES
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     documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein.
     Acceptance of the EVM is expressly subject to the following terms and conditions.
     1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
         evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
         finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
         clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
         set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software
     1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
         or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
         system.

2    Limited Warranty and Related Remedies/Disclaimers:
     2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software
         License Agreement.
     2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
         to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment
         by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any
         way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or
         instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as
         mandated by government requirements. TI does not test all parameters of each EVM.
     2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM,
         or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the
         warranty period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to
         repair or replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall
         be warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
         warranty period.

3    Regulatory Notices:
     3.1 United States
           3.1.1   Notice applicable to EVMs not FCC-Approved:
          This kit is designed to allow product developers to evaluate electronic components, circuitry, or software associated with the kit
          to determine whether to incorporate such items in a finished product and software developers to write software applications for
          use with the end product. This kit is not a finished product and when assembled may not be resold or otherwise marketed unless
          all required FCC equipment authorizations are first obtained. Operation is subject to the condition that this product not cause
          harmful interference to licensed radio stations and that this product accept harmful interference. Unless the assembled kit is
          designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must operate under the authority of
          an FCC license holder or must secure an experimental authorization under part 5 of this chapter.
           3.1.2   For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:

          CAUTION
          This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
          cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
          undesired operation.
          Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
          operate the equipment.

          FCC Interference Statement for Class A EVM devices
          NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
          the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
          operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
          installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
          Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
          correct the interference at his own expense.
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   FCC Interference Statement for Class B EVM devices
   NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
   the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
   installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
   with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
   will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
   can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
   of the following measures:
               •   Reorient or relocate the receiving antenna.
               •   Increase the separation between the equipment and receiver.
               •   Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
               •   Consult the dealer or an experienced radio/TV technician for help.

3.2 Canada
    3.2.1    For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210
   Concerning EVMs Including Radio Transmitters:
   This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
   (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
   cause undesired operation of the device.

   Concernant les EVMs avec appareils radio:
   Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
   est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
   accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

   Concerning EVMs Including Detachable Antennas:
   Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
   gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
   and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
   successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
   listed in the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated.
   Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited
   for use with this device.

   Concernant les EVMs avec antennes détachables
   Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
   d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
   radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
   rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
   présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
   manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
   non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
   l'émetteur
3.3 Japan
    3.3.1    Notice for EVMs delivered in Japan: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page 日本国内に
             輸入される評価用キット、ボードについては、次のところをご覧ください。
             http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

    3.3.2    Notice for Users of EVMs Considered “Radio Frequency Products” in Japan: EVMs entering Japan may not be certified
             by TI as conforming to Technical Regulations of Radio Law of Japan.
   If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of
   Japan to follow the instructions below with respect to EVMs:
   1.   Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
        Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
        Enforcement of Radio Law of Japan,
   2.   Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
        EVMs, or
   3.   Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
        with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
        that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.
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          【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて
          いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの
          措置を取っていただく必要がありますのでご注意ください。
          1.   電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用
               いただく。
          2.   実験局の免許を取得後ご使用いただく。
          3.   技術基準適合証明を取得後ご使用いただく。

          なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。
                   上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ
          ンスツルメンツ株式会社
          東京都新宿区西新宿６丁目２４番１号
          西新宿三井ビル

           3.3.3   Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
                   電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ
                   い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page
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4    EVM Use Restrictions and Warnings:
     4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT
         LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS.
     4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling
         or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information
         related to, for example, temperatures and voltages.
     4.3 Safety-Related Warnings and Restrictions:
           4.3.1   User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user
                   guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and
                   customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input
                   and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or
                   property damage. If there are questions concerning performance ratings and specifications, User should contact a TI
                   field representative prior to connecting interface electronics including input power and intended loads. Any loads applied
                   outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible
                   permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to connecting any
                   load to the EVM output. If there is uncertainty as to the load specification, please contact a TI field representative.
                   During normal operation, even with the inputs and outputs kept within the specified allowable ranges, some circuit
                   components may have elevated case temperatures. These components include but are not limited to linear regulators,
                   switching transistors, pass transistors, current sense resistors, and heat sinks, which can be identified using the
                   information in the associated documentation. When working with the EVM, please be aware that the EVM may become
                   very warm.
           4.3.2   EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the
                   dangers and application risks associated with handling electrical mechanical components, systems, and subsystems.
                   User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees,
                   affiliates, contractors or designees. User assumes all responsibility and liability to ensure that any interfaces (electronic
                   and/or mechanical) between the EVM and any human body are designed with suitable isolation and means to safely
                   limit accessible leakage currents to minimize the risk of electrical shock hazard. User assumes all responsibility and
                   liability for any improper or unsafe handling or use of the EVM by User or its employees, affiliates, contractors or
                   designees.
     4.4 User assumes all responsibility and liability to determine whether the EVM is subject to any applicable international, federal,
         state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all
         responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and
         liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local
         requirements.

5.   Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate
     as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as
     accurate, complete, reliable, current, or error-free.
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6.   Disclaimers:
      6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE
          DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER
          WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED
          WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY
          THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS.
      6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND
          CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY
          OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD
          PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY
          INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF
          THE EVM.

7.   USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. USER WILL DEFEND, INDEMNIFY AND HOLD TI, ITS
     LICENSORS AND THEIR REPRESENTATIVES HARMLESS FROM AND AGAINST ANY AND ALL CLAIMS, DAMAGES, LOSSES,
     EXPENSES, COSTS AND LIABILITIES (COLLECTIVELY, "CLAIMS") ARISING OUT OF OR IN CONNECTION WITH ANY
     HANDLING OR USE OF THE EVM THAT IS NOT IN ACCORDANCE WITH THESE TERMS AND CONDITIONS. THIS OBLIGATION
     SHALL APPLY WHETHER CLAIMS ARISE UNDER STATUTE, REGULATION, OR THE LAW OF TORT, CONTRACT OR ANY
     OTHER LEGAL THEORY, AND EVEN IF THE EVM FAILS TO PERFORM AS DESCRIBED OR EXPECTED.

8.   Limitations on Damages and Liability:
      8.1 General Limitations. IN NO EVENT SHALL TI BE LIABLE FOR ANY SPECIAL, COLLATERAL, INDIRECT, PUNITIVE,
          INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES IN CONNECTION WITH OR ARISING OUT OF THESE
          TERMS ANDCONDITIONS OR THE USE OF THE EVMS PROVIDED HEREUNDER, REGARDLESS OF WHETHER TI HAS
          BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED DAMAGES INCLUDE, BUT ARE NOT LIMITED
          TO, COST OF REMOVAL OR REINSTALLATION, ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS
          OR SERVICES, RETESTING, OUTSIDE COMPUTER TIME, LABOR COSTS, LOSS OF GOODWILL, LOSS OF PROFITS,
          LOSS OF SAVINGS, LOSS OF USE, LOSS OF DATA, OR BUSINESS INTERRUPTION. NO CLAIM, SUIT OR ACTION SHALL
          BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED.
      8.2 Specific Limitations. IN NO EVENT SHALL TI'S AGGREGATE LIABILITY FROM ANY WARRANTY OR OTHER OBLIGATION
          ARISING OUT OF OR IN CONNECTION WITH THESE TERMS AND CONDITIONS, OR ANY USE OF ANY TI EVM
          PROVIDED HEREUNDER, EXCEED THE TOTAL AMOUNT PAID TO TI FOR THE PARTICULAR UNITS SOLD UNDER
          THESE TERMS AND CONDITIONS WITH RESPECT TO WHICH LOSSES OR DAMAGES ARE CLAIMED. THE EXISTENCE
          OF MORE THAN ONE CLAIM AGAINST THE PARTICULAR UNITS SOLD TO USER UNDER THESE TERMS AND
          CONDITIONS SHALL NOT ENLARGE OR EXTEND THIS LIMIT.

9.   Return Policy. Except as otherwise provided, TI does not offer any refunds, returns, or exchanges. Furthermore, no return of EVM(s)
     will be accepted if the package has been opened and no return of the EVM(s) will be accepted if they are damaged or otherwise not in
     a resalable condition. If User feels it has been incorrectly charged for the EVM(s) it ordered or that delivery violates the applicable
     order, User should contact TI. All refunds will be made in full within thirty (30) working days from the return of the components(s),
     excluding any postage or packaging costs.

10. Governing Law: These terms and conditions shall be governed by and interpreted in accordance with the laws of the State of Texas,
    without reference to conflict-of-laws principles. User agrees that non-exclusive jurisdiction for any dispute arising out of or relating to
    these terms and conditions lies within courts located in the State of Texas and consents to venue in Dallas County, Texas.
    Notwithstanding the foregoing, any judgment may be enforced in any United States or foreign court, and TI may seek injunctive relief
    in any United States or foreign court.


                            Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
                                           Copyright © 2015, Texas Instruments Incorporated

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                                                              IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
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supplied at the time of order acknowledgment.
TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms
and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary
to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily
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TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and
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Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
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requirements. Nonetheless, such components are subject to these terms.
No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
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Products                                                           Applications
Audio                                www.ti.com/audio              Automotive and Transportation      www.ti.com/automotive
Amplifiers                           amplifier.ti.com              Communications and Telecom         www.ti.com/communications
Data Converters                      dataconverter.ti.com          Computers and Peripherals          www.ti.com/computers
DLP® Products                        www.dlp.com                   Consumer Electronics               www.ti.com/consumer-apps
DSP                                  dsp.ti.com                    Energy and Lighting                www.ti.com/energy
Clocks and Timers                    www.ti.com/clocks             Industrial                         www.ti.com/industrial
Interface                            interface.ti.com              Medical                            www.ti.com/medical
Logic                                logic.ti.com                  Security                           www.ti.com/security
Power Mgmt                           power.ti.com                  Space, Avionics and Defense        www.ti.com/space-avionics-defense
Microcontrollers                     microcontroller.ti.com        Video and Imaging                  www.ti.com/video
RFID                                 www.ti-rfid.com
OMAP Applications Processors         www.ti.com/omap               TI E2E Community                   e2e.ti.com
Wireless Connectivity                www.ti.com/wirelessconnectivity


                             Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265
                                            Copyright © 2016, Texas Instruments Incorporated
