High Dynamic-Range Headphone Driver Reference Design for Voltage-Output, Differential Audio DACs


Design files


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
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

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

TIDUAG7.PDF (2914 K)

Reference design overview and verified performance test data

TIDCB71.ZIP (14865 K)

Detailed schematic diagram for design layout and components

TIDRI28.PDF (101 K)

Detailed schematic diagram for design layout and components

TIDRI29.PDF (92 K)

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

TIDRI30.PDF (167 K)

Detailed overview of design layout for component placement

TIDRI32.ZIP (1748 K)

Files used for 3D models or 2D drawings of IC components

TIDRI31.PDF (354 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Fully differential amplifiers

THS4521Very low power rail-to-rail output fully differential amplifier

Data sheet: PDF | HTML
High-speed op amps (GBW ≥ 50 MHz)

OPA2836Dual, Very Low Power, Rail to Rail out, Negative Rail in, VFB Op Amp

Data sheet: PDF

Technical documentation

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Type Title Date
Design guide High Dynamic-Range Headphone Driver for DACs Design Guide Sep. 17, 2015

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