USB Audio Reference Design


Design files


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
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    Design files & products

    Design files

    Download ready-to-use system files to speed your design process.

    TIDU225.PDF (4162 K)

    Test results for the reference design, including efficiency graphs, test prerequisites and more

    TIDR407.PDF (91 K)

    Detailed schematic diagram for design layout and components

    TIDR408.ZIP (31 K)

    Complete listing of design components, reference designators, and manufacturers/part numbers

    TIDC283.ZIP (861 K)

    Design file that contains information on physical board layer of design PCB


    Includes TI products in the design and potential alternatives.

    Audio CODECs

    TLV320AIC3256Very Low-Power Stereo Codec with miniDSP and DirectPath™ HP Amplifier

    Data sheet: PDF | HTML
    I2C & I3C level shifters, buffers & hubs

    PCA95172-bit level-translating 400-kHz I2C/SMBus buffer/repeater

    Data sheet: PDF
    Linear & low-dropout (LDO) regulators

    TPS736400-mA, high-accuracy, ultra-low-dropout voltage regulator with reverse current protection & enable

    Data sheet: PDF | HTML

    Start development


    Evaluation board

    TLV320AIC3256EVM-U — TLV320AIC3256EVM-U Evaluation Module

    The TLV320AIC3256EVM-U is a complete evaluation/demonstration kit for the TLV320AIC3256 audio codec. The AIC3256 CS, is an intuitive, easy-to-use, powerful tool to learn, evaluate, and control the TLV320AIC3256. This tool was specifically designed to make learning the TLV320AIC3256 easy.

    Software (...)

    User guide: PDF
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    Limit: This limit is in place to protect sample purchases for design evaluation and will be removed once more stock is available.
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    Technical documentation

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    Type Title Date
    Test report TIDA-00090 Test Results Feb. 11, 2014
    User guide TLV320AIC3256EVM-U Evaluation Module (Rev. B) Oct. 25, 2012

    Support & training

    TI E2E™ forums with technical support from TI engineers

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