High Fidelity Audio Headphone Playback Reference Design for Portable and Smartphone Applications


Design files


Since the use of high fidelity headphones is a growing trend for portable audio playback, higher performance DAC and Headphone Amplifiers are demanded. This system converts digital audio from USB, SPDIF, or optical sources into analog using PCM5242 audio DAC. A high performance TPA6120A2 headphone amplifier in conjunction with the differential DAC achieves stunning musical clarity and definition as well as industry leading noise performance, critical for low noise headphone playback. The power supply architecture is designed to work from a 3.3V source to increase flexibility and integration into existing products and systems.

  • ±5V operation is derived from a 3.3V system power supply for integration into existing systems
  • Ground centered output
  • Stereo differential outputs on PCM5242 DAC for high noise rejection
  • Noise and Distortion performance is achieved all the way to the headphone
  • Automatic sample rate switching up to 384KHz
  • USB interface, used for evaluation, can be omitted once designed into end equipment
??image.gallery.download_en_US?? View video with transcript Video

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.

TIDU639.PDF (631 K)

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


Detailed schematic diagram for design layout and components


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


Detailed overview of design layout for component placement

TIDRBT2.ZIP (11993 K)

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

TIDC759.ZIP (857 K)

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

TIDRBT1.PDF (1094 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Audio DACs

PCM52424.2-VRMS DirectPath™, 32-bit, 384-kHz, 114-dB Audio Stereo DAC

Data sheet: PDF | HTML
Headphone amps

TPA6120A2Stereo, 9.0- to 33.0-V, analog input headphone amplifier with 128 dB dynamic range

Data sheet: PDF | HTML
LCD & OLED display power & drivers

TPS65135Split-Rail Converter, Single-Inductor, Multiple-Output (SIMO) Regulator

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

TPS735500-mA, low-IQ, low-dropout voltage regulator with enable

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

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

Data sheet: PDF | HTML
Noninverting buffers & drivers

SN74AUP1G125Single 0.8-V to 3.6-V low power buffer with 3-state outputs

Data sheet: PDF | HTML
Sample rate converters

SRC4392High-end Combo Sample Rate Converter

Data sheet: PDF

Technical documentation

No results found. Please clear your search and try again.
View all 2
Type Title Date
User guide TIDA-00385 Quick Start Guide Nov. 11, 2014
Test report TIDA-00385 Test Results Nov. 11, 2014

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​