20-W stereo, 8- to 26-V, digital input, open loop Class-D audio amplifier w/ EQ, DRC, 2.1 support


Product details


Audio input type Digital Input Architecture Class-D Speaker channels (Max) 3 Power stage supply (Max) (V) 26 Power stage supply (Min) (V) 8 Load (Min) (ohms) 4 Output power (W) 20 SNR (dB) 106 THD + N @ 1 kHz (%) 0.06 Iq (Typ) (mA) 29 Control interface Software Closed/open loop Open Analog supply (Min) (V) 3 Analog supply (Max) (V) 3.6 Power to parallel bridge tied load (Max) (W) 42.8 Sampling rate (Max) (kHz) 48 Rating Catalog Operating temperature range (C) 0 to 85 open-in-new Find other Speaker amps

Package | Pins | Size

HTQFP (PHP) 48 81 mm² 9 x 9 open-in-new Find other Speaker amps


  • Audio Input/Output
    • 20-W Into an 8- Load From an 18-V Supply
    • Wide PVDD Range, From 8 V to 26 V
    • Efficient Class-D Operation Eliminates Need for Heatsinks
    • One Serial Audio Input (Two Audio Channels)
    • 2.1 Mode (2 SE + 1 BTL)
    • 2.0 Mode (2 BTL)
    • Single-Filter PBTL Mode Support
    • I2C Address Selection Pin (Chip Select)
    • Supports 8-kHz to 48-kHz Sample Rate (LJ/RJ/I2S)
  • Audio/PWM Processing
    • Independent Channel Volume Controls With 24-dB to Mute
    • Separate Dynamic Range Control for Satellite and Subchannels
    • 21 Programmable Biquads for Speaker EQ and Other Audio Processing Features
    • Programmable Coefficients for DRC Filters
    • DC Blocking Filters
    • Support for 3D Effects
  • General Features
    • Serial Control Interface Operational Without MCLK
    • Factory-Trimmed Internal Oscillator for Automatic Rate Detection
    • Surface Mount, 48-Pin, 7-mm × 7-mm HTQFP Package
    • Thermal and Short-Circuit Protection
    • Support for AD or BD Mode
  • Benefits
    • Up to 90% Efficient
    • AD and BD Filter Mode Support
    • SNR: 106 dB, A-Weighted
    • EQ: Speaker Equalization Improves Audio Performance
    • DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables
      Speaker Protection, Easy Listening, Night-Mode Listening.
    • Separate DRC for Satellite and Subchannels
    • Autobank Switching: Preload Coefficients for Different Sample Rates.
      No Need to Write new Coefficients to the Part When Sample Rate Changes.
    • Autodetect: Automatically Detects Sample-Rate Changes. No Need for
      External Microprocessor Intervention
  • Requires Only 3.3 V and PVDD
    • Television
    • iPod™ Dock
    • Sound Bar

iPod is a trademark of Apple Inc.

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The TAS5711 is a 20-W, efficient, digital audio power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers.

The TAS5711 is an I2S slave-only device receiving all clocks from external sources. The TAS5711 operates with a PWM carrier between 384-kHz switching rate and 352-KHz switching rate depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20  kHz.

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Next Generation 20-W Stereo, 16V Open-Loop Digital Input Audio Class-D Amplifier with EQ and 3-Band AGL:  TAS5733L

Next Generation 25-W Stereo, 26V Open-Loop Digital Input Audio Class-D Amplifier with EQ and 3-Band AGL:  TAS5751M

Next Generation 25-W Stereo, 26V Open-Loop Digital Input Audio Class-D Amplifier with EQ, 3-Band AGL and Headphone Output:  TAS5753MD

Technical documentation

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Type Title Date
* Datasheet TAS5711 20-W Digital Audio-Power Amplifier With EQ, DRC, and 2.1 Mode datasheet (Rev. A) Aug. 26, 2010
Application notes Using Thermal Calculation Tools for Analog Components (Rev. A) Aug. 30, 2019
Application notes Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) Aug. 26, 2019
Application notes AN-1849 An Audio Amplifier Power Supply Design (Rev. C) Jun. 27, 2019
User guides TAS5711EVM Evaluation Module User's Guide (Rev. A) Sep. 11, 2014
Application notes AN-1737 Managing EMI in Class D Audio Applications (Rev. A) May 01, 2013

Design & development

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

Hardware development

document-generic User guide

The TAS5711 evaluation module demonstrates the TAS5711 device from Texas Instruments. The TAS5711 combines a high-performance PWM processor with a class-D audio power amplifier. This EVM can be configured with two single-ended speakers with a BTL subwoofers (2.1) or two bridge-tied speakers (BTL (...)

  • Channel evaluation module design
  • Self-contained protection systems and control pins
  • USB interface
  • Standard I2S data input using optical or coaxial inputs
  • Analog input through analog-to-digital converter
  • Double-sided, plated-through PCB, 1-oz copper, 2 mm
  • Access to control signal gain and data format (...)

Software development

Linux Driver for TAS571X
TAS571XSW-LINUX The Linux driver supports the TAS571x family of Digital input stereo amplifiers. The Linux driver supports communication through the I2C bus and interfaces with the Linux DAI (Digital Audio Interface) class.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A


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