TAS5706A 20-W Stereo Closed-loop I2S Audio Power Amplifier with Speaker EQ and DRC | TI.com

TAS5706A (NRND) 20-W Stereo Closed-loop I2S Audio Power Amplifier with Speaker EQ and DRC


Not Recommended for New Designs (NRND)

Replaced By TAS5707 – The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent. 20W Stereo Class-D Amplifier with EQ and DRC, 2 Audio Channels

TI does not recommend using this part in a new design. This product continues to be in production to support existing customers.


The TAS5706A/B is a 20-W, efficient, digital audio power amplifier for driving stereo bridged-tied speakers. Two serial data inputs allow processing of up to four discrete audio channels and seamless integration to most digital audio processors and MPEG decoders, accepting a wide range of input data and clock rates. A fully programmable data path allows these channels to be routed to the internal speaker drivers or output via the subwoofer or headphone PWM outputs.

The TAS5706A/B is a slave-only device receiving all clocks from external sources. The TAS5706A/B operates at a 384-kHz switching rate for 32-, 48-, 96-, and 192-kHz data, and at a 352.8 kHz switching rate for 44.1-, 88.2-, and 176.4-kHz data. The 8× oversampling combined with the fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.


  • Audio Input/Output
    • 20-W into an 8- Load From an 18-V Supply
    • Two Serial Audio Inputs (Four Audio Channels)
  • TAS5706A Supports:
    • 2-Ch Bridged Outputs (20 W × 2)
  • TAS5706B Supports:
    • 2-Ch Bridged Outputs (20 W × 2)
    • 4-Ch Single-Ended Outputs (10 W × 4)
    • 2-Ch Single-Ended + 1-Ch Bridged (2.1 Mode) (10 W × 2 + 20 W)
  • Supports 32-kHz-192-kHz Sample Rates (LJ/RJ/I2S)
  • Closed Loop Power Stage Architecture
    • Improved PSRR Reduces Power Supply Performance Requirements
    • Higher Damping Factor Provides for Tighter, More Accurate Sound With Improved Bass Response
    • Constant Output Power Over Variation in Supply
  • Wide PVCC Range From (10 V to 26 V)
    • No Separate Supply Required for Gate Drive
  • Headphone PWM Outputs
  • Subwoofer PWM Outputs
  • AM Interference Avoidance Support
  • Audio/PWM Processing
    • Independent Channel Volume Controls With 48-dB to -79-dB Range—Soft Mute (50% Duty Cycle)
    • Programmable Dynamic Range Control
    • 7 Programmable Biquads for Speaker Equalization for Left and Right Channels
    • 4 Programmable Biquads for Bass Processing
    • Adaptive Biquad Coefficients for EQ and DRC Filters
    • Programmable Input and Output Mixers
    • Automatic Sample-Rate Detection and Coefficient Banking
  • General Features
    • Serial Control Interface Operational Without MCLK
    • Factory-Trimmed Internal Oscillator Avoids the Need for External Crystal
    • Surface Mount, 64-Terminal, 10-mm × 10-mm HTQFP Package
    • Thermal and Short-Circuit Protection

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