Product details

Output power (W) 0.03 Analog supply (Min) (V) 1.7 Analog supply (Max) (V) 1.9 PSRR (dB) 92 Rating Catalog Operating temperature range (C) -40 to 85 Headphone channels Stereo Volume control Yes Shutdown current (ISD) (uA) 1 Architecture Class-G Iq per channel (Typ) (mA) 1.2
Output power (W) 0.03 Analog supply (Min) (V) 1.7 Analog supply (Max) (V) 1.9 PSRR (dB) 92 Rating Catalog Operating temperature range (C) -40 to 85 Headphone channels Stereo Volume control Yes Shutdown current (ISD) (uA) 1 Architecture Class-G Iq per channel (Typ) (mA) 1.2
DSBGA (YFF) 25 5 mm² 2.48 x 2.48
  • Ultra Low-Power, High-Performance DirectPath™ Class-G
    Headphone Amplifier
    • Ground-Centered Output Eliminates DC-Blocking
      Capacitors
    • 30 mW/Ch into 32 Ω / Ch at 1% THD+N
    • –42 dB to +6 dB Volume Control
    • 2.0 µV Output Noise at –42 dB Gain
    • 91-dB PSRR
    • Ground Loop Rejection for Reducing Crosstalk
  • Fully Differential Mic Preamplifier With Variable Gain
    and 3.4-µV Low Noise
    • Integrated AC-Coupling Capacitor
    • Ground Loop Rejection for Reducing Headphone to
      Mic Crosstalk
  • Choice of Two Mic Bias Voltages: 2.0 V and 2.6 V
    • 92-dB PSRR
    • Integrated Programmable Mic Bias Resistor
  • Advanced Accessory Insertion, Removal, and Type Detection
  • Passive Multi-button Support Using 10-Bit SAR ADC
    • Implements Proprietary Scheme to Reduce Error Caused
      by Audio Playback Signal in Presence of Finite Resistance
      on Headset Ground Return Path
  • Integrated Level-4 IEC ESD Protection on Jack Connected
    Pins (on EVM)
  • Ultra Low-Power Chip Shutdown Mode
  • I2C Interface
  • Short-Circuit Protection
  • 0.4-mm Pitch 25-Ball WCSP
  • Ultra Low-Power, High-Performance DirectPath™ Class-G
    Headphone Amplifier
    • Ground-Centered Output Eliminates DC-Blocking
      Capacitors
    • 30 mW/Ch into 32 Ω / Ch at 1% THD+N
    • –42 dB to +6 dB Volume Control
    • 2.0 µV Output Noise at –42 dB Gain
    • 91-dB PSRR
    • Ground Loop Rejection for Reducing Crosstalk
  • Fully Differential Mic Preamplifier With Variable Gain
    and 3.4-µV Low Noise
    • Integrated AC-Coupling Capacitor
    • Ground Loop Rejection for Reducing Headphone to
      Mic Crosstalk
  • Choice of Two Mic Bias Voltages: 2.0 V and 2.6 V
    • 92-dB PSRR
    • Integrated Programmable Mic Bias Resistor
  • Advanced Accessory Insertion, Removal, and Type Detection
  • Passive Multi-button Support Using 10-Bit SAR ADC
    • Implements Proprietary Scheme to Reduce Error Caused
      by Audio Playback Signal in Presence of Finite Resistance
      on Headset Ground Return Path
  • Integrated Level-4 IEC ESD Protection on Jack Connected
    Pins (on EVM)
  • Ultra Low-Power Chip Shutdown Mode
  • I2C Interface
  • Short-Circuit Protection
  • 0.4-mm Pitch 25-Ball WCSP

The TPA6166A2 single-chip headset interface IC simplifies the challenges of detecting what kind of device an end user has plugged into the headphone jack while delivering excellent audio quality. The device enables smaller end products by integrating a high-performance, low-power DirectPath variable-attenuation class-G stereo headphone amplifier, variable-gain microphone preamplifier with bias with advanced accessory detection circuitry, all in a tiny 5-mm × 5-mm terminal, 0.4-mm pitch WCSP package.

The class-G headphone amplifier maximizes battery life by adjusting the supply voltage of the headphone amplifier based on audio signal level. With 8-µV output noise at 0-dB gain and PSRR of 91 dB, the headphone amplifier provides excellent audio performance. DirectPath eliminates the need for DC-blocking capacitors. The microphone preamplifier has two programmable gains of 12 dB and 24 dB, and 3.4 µV input referred noise.

The microphone bias voltage has two programmable settings of 2 V and 2.6 V. The bias output drives up to 1.2 mA of current, has a low output noise of 2 µV, and 92-dB PSRR, providing excellent rejection of power supply noise in wireless handsets.

The advanced accessory detection algorithm automatically detects six supported accessories and enables or disables internal components.

The TPA6166A2 single-chip headset interface IC simplifies the challenges of detecting what kind of device an end user has plugged into the headphone jack while delivering excellent audio quality. The device enables smaller end products by integrating a high-performance, low-power DirectPath variable-attenuation class-G stereo headphone amplifier, variable-gain microphone preamplifier with bias with advanced accessory detection circuitry, all in a tiny 5-mm × 5-mm terminal, 0.4-mm pitch WCSP package.

The class-G headphone amplifier maximizes battery life by adjusting the supply voltage of the headphone amplifier based on audio signal level. With 8-µV output noise at 0-dB gain and PSRR of 91 dB, the headphone amplifier provides excellent audio performance. DirectPath eliminates the need for DC-blocking capacitors. The microphone preamplifier has two programmable gains of 12 dB and 24 dB, and 3.4 µV input referred noise.

The microphone bias voltage has two programmable settings of 2 V and 2.6 V. The bias output drives up to 1.2 mA of current, has a low output noise of 2 µV, and 92-dB PSRR, providing excellent rejection of power supply noise in wireless handsets.

The advanced accessory detection algorithm automatically detects six supported accessories and enables or disables internal components.

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Technical documentation

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Type Title Date
* Data sheet TPA6166A2 3.5-mm Jack Detect and Headset Interface IC datasheet (Rev. B) 23 Jan 2015
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 26 Aug 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) 27 Jun 2019
User guide TPA6166A2 Audio Amplifier with Jack Detection 12 Mar 2014
Application note Reducing Crosstalk in Directpath Headphone Amplifiers 28 Mar 2012
Application note Ground Loop Break (GLB) Circuits 01 Oct 2009
Application note PowerWiseë Class G versus Class AB Headphone Amplifiers 11 Jun 2009
Application note A Low-Cost, Single Coupling Capacitor Config. for Stereo Headphone Amplifiers 22 Dec 1999

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

TPA6166A2YFFEVM — TPA6166A2YFFEVM Headphone Amplifier with Jack Detect Evaluation Module

This tool can be used to audition the audio performance, a stereo DirectPath™ (capacitor-free) Class-G headphone amplifier and assess the advanced headset insertion, removal and type detection circuitry with integrated ground switching. users can also evaluate multi-button support (...)

Application software & framework

PUREPATHCONSOLE — PurePath™ Console graphical development suite for audio system design and development

PurePath™ Console is a highly integrated and easy-to-use audio development suite designed specifically to simplify the evaluation, configuration and debug process associated with the development of audio products. Watch how easy it is to use the PurePath™ Console 3 software.
PurePath Console’s (...)
Simulation model

TPA6166A2 IBIS Model

SLAM212.ZIP (17 KB) - IBIS Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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 (...)
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DSBGA (YFF) 25 View options

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