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


Product details


Output power (W) 1.5 Analog supply (Min) (V) 10 Analog supply (Max) (V) 30 PSRR (dB) 75 Rating Catalog Operating temperature range (C) -40 to 85 Headphone channels Stereo Volume control No Shutdown current (ISD) (uA) 0.7 Architecture Class-AB Iq per channel (Typ) (mA) 11.5 open-in-new Find other Headphone amps

Package | Pins | Size

HSOIC (DWP) 20 133 mm² 12.825 x 10.405000000000001 VQFN (RGY) 14 12 mm² 3.5 x 3.5 open-in-new Find other Headphone amps


  • SNR of 128dB A-Weighted.
  • THD of 112.5dB
  • Current-Feedback Architecture
  • Output Voltage Noise of 0.9µVrms at
    Gain = 1V/V (16Ω Load)
  • Power Supply Range: ±5V to ±15V
  • 1300V/µs Slew Rate
  • Can be configured for Single Ended or Differential
  • Independent Power Supplies for Low Crosstalk
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In applications requiring a high-power output, very high fidelity headphone amplifier, the TPA6120A2 replaces a costly discrete design and allows music, not the amplifier, to be heard. The TPA6120A2’s current-feedback AB amplifier architecture delivers high bandwidth, extremely low noise, and up to 128dB of dynamic range.

Three key features make current-feedback amplifiers outstanding for audio. The first feature is the high slew rate that prevents odd order distortion anomalies. The second feature is current-on-demand at the output that enables the amplifier to respond quickly and linearly when necessary without risk of output distortion. When large amounts of output power are suddenly needed, the amplifier can respond extremely quickly without raising the noise floor of the system and degrading the signal-to-noise ratio. The third feature is the gain-independent frequency response that allows the full bandwidth of the amplifier to be used over a wide range of gain settings.

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Technical documentation

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Type Title Date
* Data sheet TPA6120A2 High Fidelity Headphone Amplifier datasheet (Rev. B) Feb. 04, 2015
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
User guide TPA6120A2RGYEVM User's Guide Jul. 17, 2014
User guide TPA6120A2EVM - User Guide May 06, 2004

Design & development

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Hardware development

document-generic User guide

The TPA6120A2 is a Hi-Fi stereo headphone amplifier capable of delivering 1.5 W of continuous RMS power per channel into 32-Ohm speakers with less than 0.0003% THD+N.

  • Current-Feedback Architecture
  • Signal-to-Noise Ratio (SNR) > 120dB
  • Intermodulation Distortion = 0.00014%
  • Differential Inputs
document-generic User guide

The TPA6120A2 is an exceptionally high-performance Hi-Fi stereo headphone amplifier capable of delivering 1.5 W of continuous RMS power per channel into 32-Ohm speakers in a tiny QFP package.

  • Compact EVM layout emphasizes the tiny solution size
  • Versatile EVM design allows for Single Ended or Differential inputs
  • Industry leading Signal-to-Noise Ratio (SNR) = 128dB
  • Best in class Voltage Noise of 0.9 uVrms with a stereo 16 Ohm Load

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLOC308.ZIP (1389 KB)

Reference designs

High Fidelity Audio Headphone Playback Reference Design for Portable and Smartphone Applications
TIDA-00385 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 (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
SO PowerPAD (DWP) 20 View options
VQFN (RGY) 14 View options

Ordering & quality

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