20-W Stereo Closed-loop I2S Audio Power Amplifier with Speaker EQ and DRC

TAS5706 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
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TAS5805M ACTIVE 23-W stereo, 45-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier w/ processing 23-W stereo, 45-W mono, 4.5- to 26.4-V supply, digital input Class-D audio amplifier w/ processing
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Features

  • Audio Input/Output
    • 20-W into an 8-Ω Load From an 18-V Supply
    • Two Serial Audio Inputs (Four Audio Channels)
    • Supports Multiple Output Configurations:
      • 2-Ch Bridged Outputs (20 W × 2)
      • 4-Ch Single-Ended Outputs (10 W × 4)
      • 2-Ch Single-Ended + 1-Ch Bridged (2.1) (10 W × 2 + 20 W)
  • 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
  • Supports 32-kHz–192-kHz Sample Rates (LJ/RJ/I2S)
  • Headphone PWM Outputs
  • Subwoofer PWM Outputs
  • AM Interference Avoidance Support
  • Audio/PWM Processing
    • Independent Channel Volume Controls With 24-dB to
      –100-dB Range—Soft Mute (50% Duty Cycle)
    • Programmable Dynamic Range Control
    • 16 Programmable Biquads for Speaker Equalization
    • Adaptive Biquad Coefficients for EQ and DRC Filters
    • Programmable Input and Output Mixers
    • Loudness Compensation for Subwoofer
    • 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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Description

The TAS5706 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 TAS5706 is a slave-only device receiving all clocks from external sources. The TAS5706 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.

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* Data sheet 20W-Stereo Digital Audio Power Amplifier With EQ and DRC datasheet (Rev. B) Dec. 06, 2010

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