High Dynamic-Range Headphone Driver Reference Design for Voltage-Output, Differential Audio DACs
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A low THD+N amplifier signal chain for driving headphones is presented. The design walks through various factors to consider in order to optimize performance based on customer needs.

  • Ultra-low distortion, THD+N < 0.0003%
  • Low power consumption, 18.25mW/channel
  • Ability to drive 50mW of output power into 32Ω headphone load without sacrificing performance
  • Compact design ideal for portable application
  • Low-power mode to save power in portable applications
  • The circuit performance is thoroughly whetted and includes the entire amplifier singal-chain and a design guide that walks the user throguh various options to consider when designing a headphone amplifier

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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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
OPA2836  Dual, Very Low Power, Rail to Rail out, Negative Rail in, VFB Op Amp  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
THS4521  Very low power rail-to-rail output fully differential amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
OPA2836 Download Download
Download Download
Download Download
THS4521 Download Download
Download Download

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 2914 17 Sep 2015
Design files (6)
Title Type Size (KB) Date
ZIP 14865 07 Oct 2015
ZIP 1748 07 Oct 2015
PDF 354 07 Oct 2015
PDF 167 07 Oct 2015
PDF 92 07 Oct 2015
PDF 101 07 Oct 2015

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