TAS5701

20W 立体声数字音频功率放大器（硬件控制）

The is a 20-W efficient, digital audio power amplifier for driving stereo bridge-tied speakers. Two serial data inputs support up to 3 discrete audio channels. The SDIN1 input is routed to the internal left and right outputs. The SDIN2 input is dedicated to the SUB_PWM± outputs.

The TAS5701 is a clock slave-only device receiving clocks from external sources. The TAS5701 operates at a 384-kHz switching rate for 32-, 48-, 96-, and 192-kHz data and 352.8-kHz switching rate 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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Wide PVDD Range 0 V to 21 V

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Efficient Class-D Operation Eliminates Need for Heat Sinks

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Two Serial Audio Inputs 3 Audio channels

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

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Line-Level Subwoofer PWM Outputs

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Audio/PWM Processing

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BD Filter-free Modulation Supporting Bridge-Tied Loads ONLY

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4-Step Volume Control 0 dB, 6 dB, 12 dB, 18 dB

– All Channels Share Same Control

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Soft Mute 50% Duty Cycle

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DC Blocking Filters

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Fixed Maximum Modulation Limit At 97.7%

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≥100-dB SNR – Measured at Maximum Output With THD+N = 1%, 1 kHz,

A-Weighted Noise, Gain = 0 dB

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THD < 0.1% at 1/2 Rated Power

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General Features

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5-V Tolerant Inputs See pin list for details on which inputs are 5-V tolerant

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Shutdown Mode for Low Power Consumption

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Thermal and Short-Circuit Protection

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Autodetect: Automatically Detect Sample-Rate Changes –

No Need for External Microprocessor Intervention