SLOS597B December 2008  – July 2017 TPA6132A2


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings
    3. 6.3Recommended Operating Condtions
    4. 6.4Thermal Information
    5. 6.5Electrical Characteristics
    6. 6.6Operating Characteristics
    7. 6.7Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Headphone Amplifiers
      2. 7.3.2Eliminating Turn-on Pop and Power Supply Sequencing
      3. 7.3.3RF and Power Supply Noise Immunity
      4. 7.3.4Constant Maximum Output Power and Acoustic Shock Prevention
    4. 7.4Device Functional Modes
      1. 7.4.1Gain Control
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Applications
      1. 8.2.1Configuration with Differential Input Signals
        1. Requirements
        2. Design Procedure
          1. Coupling Capacitors
          2. Pump Flying Capacitor and HPVSS Capacitor
        3. Curves
      2. 8.2.2Configuration with Single-Ended Input Signals
        1. Requirements
        2. Design Procedure
        3. Curves
  9. Power Supply Recommendations
    1. 9.1Power Supply and HPVDD Decoupling Capacitors
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
    3. 10.3GND Connections
  11. 11Device and Documentation Support
    1. 11.1Receiving Notification of Documentation Updates
    2. 11.2Community Resources
    3. 11.3Trademarks
    4. 11.4Electrostatic Discharge Caution
    5. 11.5Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RTE|16
Orderable Information


  • Patented DirectPath™ Technology Eliminates Need for DC-Blocking Capacitors
    • Outputs Biased at 0 V
    • Excellent Low Frequency Fidelity
  • Active Click and Pop Suppression
  • 2.1 mA Typical Supply Current
  • Fully Differential or Single-Ended Inputs
    • Built-In Resistors Reduces Component Count
    • Improves System Noise Performance
  • Constant Maximum Output Power from 2.3 V to 5.5 V Supply
    • Simplifies Design to Prevent Acoustic Shock
  • Improved RF Noise Immunity
  • MicrosoftTM Windows VistaTM Compliant
  • High Power Supply Noise Rejection
    • 100 dB PSRR at 217 Hz
    • 90 dB PSRR at 10 kHz
  • Wide Power Supply Range: 2.3 V to 5.5 V
  • Gain Settings: –6 dB, 0 dB, 3 dB, and 6 dB
  • Short-Circuit and Thermal-Overload Protection
  • ±8 kV HBM ESD Protected Outputs
  • Small Package Available
    • 16-Pin, 3 mm × 3 mm Thin QFN


  • Smart Phones / Cellular Phones
  • Notebook Computers
  • CD / MP3 Players
  • Portable Gaming


The TPA6132A2 (sometimes referred to as TPA6132) is a DirectPath™ stereo headphone amplifier that eliminates the need for external dc-blocking output capacitors. Differential stereo inputs and built-in resistors set the device gain, further reducing external component count. Gain is selectable at –6 dB, 0 dB, 3 dB or 6 dB. The amplifier drives 25 mW into 16 Ω speakers from a single 2.3 V supply. The TPA6132A2 (TPA6132) provides a constant maximum output power independent of the supply voltage, thus facilitating the design for prevention of acoustic shock.

The TPA6132A2 features fully differential inputs to reduce system noise pickup between the audio source and the headphone amplifier. The high power supply noise rejection performance and differential architecture provides increased RF noise immunity. For single-ended input signals, connect INL+ and INR+ to ground.

The device has built-in pop suppression circuitry to completely eliminate disturbing pop noise during turn-on and turn-off. 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 TPA6132A2 operates from a single 2.3 V to 5.5 V supply with 2.1 mA of typical supply current. Shutdown mode reduces supply current to less than 1 μA.

Device Information(1)

TPA6132A2WQFN (16)3.00 mm x 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

TPA6132A2 app_cir_los597.gif