32-mW, stereo, analog input headphone amplifier with I2C volume control


Product details


Output power (W) 0.025 Analog supply (Min) (V) 2.5 Analog supply (Max) (V) 5.5 PSRR (dB) 105 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) 0.6 open-in-new Find other Headphone amps

Package | Pins | Size

DSBGA (YFF) 16 0 mm² 1.6 x 1.6 open-in-new Find other Headphone amps


  • TI Class-G Technology Significantly Prolongs Battery Life and Music Playback Time
    • 0.6 mA / Ch Quiescent Current
    • 50% to 80% Lower Quiescent Current than Ground-Referenced Class-AB Headphone Amplifiers
  • DirectPath™ Technology Eliminates Large Output DC-Blocking Capacitors
    • Outputs Biased at 0 V
    • Improves Low Frequency Audio Fidelity
  • I2C Volume Control
    • –59 dB to +4 dB Gain
  • Active Click and Pop Suppression
  • Fully Differential Inputs Reduce System Noise
    • Also Configurable as Single-Ended Inputs
  • SGND Pin Eliminates Ground Loop Noise
  • Wide Power Supply Range: 2.5 V to 5.5 V
  • 100 dB Power Supply Noise Rejection
  • Short-Circuit Current Limiter
  • Thermal-Overload Protection
  • Software Compatible with TPA6130A2
  • 0,4 mm Pitch, 1,6 mm × 1,6 mm WCSP Package
    • Cellular Phones / Music Phones
    • Portable Media / MP3 Players
    • Portable CD / DVD Players

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The TPA6140A2 (also known as TPA6140) is a Class-G DirectPath stereo headphone amplifier with built-in I2C volume control. Class-G technology maximizes battery life by adjusting the voltage supplies of the headphone amplifier based on the audio signal level. At low level audio signals, the internal supply voltage is reduced to minimize power dissipation. DirectPath™ technology eliminates external DC-blocking capacitors.

The device operates from a 2.5 V to 5.5 V supply voltage. Class-G operation keeps total supply current below 5.0 mA while delivering 500 µW per channel into 32 . Shutdown mode reduces the supply current to less than 3 µA and is activated through the I2C interface.

The TPA6140A2 (TPA6140) I2C register map is compatible to the TPA6130A2, simplifying software development.

The amplifier outputs have short-circuit and thermal-overload protection along with ±8 kV HBM ESD protection, simplifying end equipment compliance to the IEC 61000-4-2 ESD standard.

The TPA6140A2 (TPA6140) is available in a 0,4 mm pitch, 16-bump 1,6 mm × 1,6 mm WCSP (YFF) package.

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Technical documentation

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Type Title Date
* Data sheet Class-G DirectPath Stereo Headphone Amplifier With I2C Volume Control datasheet (Rev. A) Oct. 13, 2009
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 TPA6140A2EVM - User Guide Mar. 16, 2009

Design & development

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Hardware development

document-generic User guide

The TPA6140A2YFFEVM allows the engineer to evaluate the TPA6140A2, a stereo Class-G DirectPath™ (capacitor-free) headphone amplifier in a WCSP package. The TPA6140A2 has extremely low power consumption that enables much longer battery life in portable applications.

  • Highly Power-Efficient Class-G Operation
  • DirectPath™ Ground-Referenced Outputs
  • Power Supply Voltage Range: 2.5 V to 5.5 V
  • I2C Volume Control: -59 dB to +4 dB Gain Range
  • Separate SGND Input for Preventing Ground Loop Noise
  • High Power Supply Rejection Ratio
  • Differential Inputs for Maximum Noise Rejection
  • (...)

Software development

Linux Driver for TPA6130A2
TPA6130A2SW-LINUX The Linux driver supports the TPA61x0A2 family of Stereo Headphone Amplifiers. The Linux driver supports communication through the I2C bus and interfaces with the Linux DAPM (Dynamic Audio Power Management for Portable Devices) class.
Linux Mainline Status

Available in Linux Main line: Yes
Available (...)

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
  • (...)

CAD/CAE symbols

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DSBGA (YFF) 16 View options

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