USB Audio Reference Design
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See the Important Notice and Disclaimer covering reference designs and other TI resources.


This reference design, featuring the TLV320AIC3256 audio codec, is a fully-functional USB powered streaming audio platform that allows external audio sources to be connected to the USB port of a PC or laptop. User control is provided via a powerful, easy-to-use Windows-based GUI.

Software development for the TLV320AIC3256 is supported through TI's comprehensive PurePath™ Studio Development Environment. A powerful, easy-to-use tool designed specifically to simplify software development on the TLV320AIC3xxx miniDSP audio platform. The Graphical Development Environment consists of a library of common audio functions that can be dragged-and-dropped into an audio signal flow and graphically connected together. The DSP code can then be assembled from the graphical signal flow with the click of a mouse.

The USB Audio Reference Design is operational with one USB cable connection to a PC. The USB connection provides power, control, and streaming audio data to the EVM for reduced setup and configuration.

  • Full-featured board for streaming USB audio
  • Power, control, and streaming audio data provided through USB – no other ports needed
  • Design provides many test points for easy analysis with other circuits and input devices
  • Completely compatible with TI’s PurePath™ Studio Development environment

  • See the Important Notice and Disclaimer covering reference designs and other TI resources.


    Schematic/Block Diagram

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    Test Data

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    Design Files

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    Part Number Buy from Texas Instruments or Third Party Buy from Authorized Distributor Status

    TLV320AIC3256EVM-U :
    TLV320AIC3256EVM-U Evaluation Module


    Pricing may vary.

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    TI Devices (3)

    Order samples, get tools and find more information on the TI products in this reference design.

    Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
    PCA9517  Level-translating I2C bus repeater  I2C ICs  Not Available Not Available
    TLV320AIC3256  Very Low-Power Stereo Codec with miniDSP and DirectPath™ HP Amplifier  Audio converters  Sample & Buy View Design Kits & Evaluation Modules
    TPS736  400-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable  Power management  Sample & Buy View Design Kits & Evaluation Modules

    CAD/CAE symbols

    Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
    PCA9517 Download Download
    Download Download
    Download -
    Download -
    TLV320AIC3256 Download Download
    Download -
    TPS736 Download Download
    Download Download
    Download Download

    Texas Instruments and Accelerated Designs, Inc. have collaborated together to provide TI customers with schematic symbols and PCB layout footprints for TI products.

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    Step 2: Download the Symbol and Footprint from the CAD.bxl file table.

    Technical documentation

    See the Important Notice and Disclaimer covering reference designs and other TI resources.

    User guides (2)
    Title Type Size (KB) Date
    PDF 4104 11 Feb 2014
    PDF 1819 25 Oct 2012
    Design files (3)
    Title Type Size (KB) Date
    ZIP 861 18 Feb 2014
    ZIP 31 18 Feb 2014
    PDF 91 18 Feb 2014

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