TAS5706A

具有EQ和DRC的20W立体声数字音频功率放大器 20-W Stereo Digital Audio Power Amplifier with EQ and DRC

The /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.

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Audio Input/Output

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20-W into an 8- Load From an 18-V Supply

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Two Serial Audio Inputs Four Audio Channels

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TAS5706A Supports:

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2-Ch Bridged Outputs 20 W × 2

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TAS5706B Supports:

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2-Ch Bridged Outputs 20 W × 2

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4-Ch Single-Ended Outputs 10 W × 4

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2-Ch Single-Ended + 1-Ch Bridged 2.1 Mode 10 W × 2 + 20 W

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Supports 32-kHz-192-kHz Sample Rates LJ/RJ/I2S

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Closed Loop Power Stage Architecture

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Improved PSRR Reduces Power Supply Performance Requirements

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Higher Damping Factor Provides for Tighter, More Accurate Sound With Improved Bass Response

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Constant Output Power Over Variation in Supply

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Wide PVCC Range From 10 V to 26 V

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No Separate Supply Required for Gate Drive

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Headphone PWM Outputs

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Subwoofer PWM Outputs

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AM Interference Avoidance Support

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Audio/PWM Processing

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Independent Channel Volume Controls With 48-dB to -79-dB Range—Soft Mute 50% Duty Cycle

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Programmable Dynamic Range Control

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7 Programmable Biquads for Speaker Equalization for Left and Right Channels

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4 Programmable Biquads for Bass Processing

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Adaptive Biquad Coefficients for EQ and DRC Filters

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Programmable Input and Output Mixers

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Automatic Sample-Rate Detection and Coefficient Banking

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General Features

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Serial Control Interface Operational Without MCLK

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Factory-Trimmed Internal Oscillator Avoids the Need for External Crystal

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Surface Mount, 64-Terminal, 10-mm × 10-mm HTQFP Package

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Thermal and Short-Circuit Protection

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