TAS5504A

4 通道数字音频 PWM 处理器

The is a four-channel digital pulse-width modulator PWM that provides both advanced performance and a high level of system integration. The TAS5504A is designed to interface seamlessly with most audio digital signal processors. The TAS5504A automatically adjusts control configurations in response to clock and data-rate changes and idle conditions. This enables the TAS5504A to provide an easy-to-use control interface with relaxed timing requirements.

The TAS5504A can drive four channels of H-bridge power stages. Texas Instruments power stages are designed to work seamlessly with the TAS5504A. The TAS5504A supports either the single-ended or bridge-tied-load configuration. The TAS5504A also provides a high-performance differential output to drive an external differential-input analog headphone amplifier, such as the TPA112.

The TAS5504A uses AD modulation operating at a 384-kHz switching rate for 48-, 96-, and

192-kHz data. The 8× oversampling combined with the 5th-order noise shaper provides a broad, flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

The TAS5504A is a clocked, slave-only device. The TAS5504A receives MCLK, SCLK, and LRCLK from other system components. The TAS5504A accepts master clock rates of 128, 192, 256, 384, 512, and 768 fS. The TAS5504A accepts a 64-fS bit clock.

The TAS5504A allows for extending the dynamic range by providing a power-supply volume-control PSVC output signal.

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Audio Input/Output

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Automatic Master Clock Rate and Data

Sample Rate Detection

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Four Serial Audio Input Channels

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Four PWM Audio Output Channels

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Headphone PWM Output to Drive an External

Differential Amplifier Like the TPA112

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PWM Outputs Support Single-Ended and

Bridge-Tied Loads

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32-, 38-, 44.1-, 48-, 88.2-, 96-, 176.4-,

and 192-kHz Sampling Rates

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Data Formats: 16-, 20-, or 24-Bit Left-Justified,

I2S, or Right-Justified Input Data

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64 × fS Bit-Clock Rate

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128, 192, 256, 384, 512, and 768 × fS Master

Clock Rates up to a Maximum of 50 MHz

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Audio Processing

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48-Bit Processing Architecture With 76 Bits

of Precision for Most Audio-Processing Features

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Volume Control Range: 36 dB to –109 dB

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Master Volume Control Range of 18 dB

to –100 dB

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Four Individual Channel Volume Control

Ranges of 18-dB to –109-dB

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Programmable Soft Volume and Mute Update Rates

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Two Bass and Treble Tone Controls With ±18-dB Range,

Selectable Corner Frequencies, and Second-Order Slopes

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L, R, and C

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Sub

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Configurable Loudness Compensation

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Two Dynamic Range Compressors With Two Thresholds,

Two Offsets, and Three Slopes

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Seven Biquads per Channel

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8 × 4 Input Crossbar Mixer. Each Signal Processing

Channel Input Can Be Any Ratio of the Eight Input Channels

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4 × 2 Output Mixer – Channels 1 and 2. Each Output

Can Be Any Ratio of Any Two Signal-Processed Channels.

It Is Recommended to Use the Pass-Through Output Mixer

Configuration.

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4 × 3 Output Mixer – Channels 3 and 4. Each Output

Can Be Any Ratio of Any Three Signal-Processed Channels. It Is

Recommended to Use the Pass-Through Output Mixer Configuration.

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Three Coefficient Sets Stored on the Device Can Be Selected

Manually or Automatically Based on Specific Data Rates

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DC Blocking Filters

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Able to Support a Variety of Bass-Management Algorithms

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PWM Processing

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32-Bit Processing PWM Architecture With

40 Bits of Precision

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8× Oversampling With 5th-Order Noise Shaping at

32 kHz–48 kHz, 4× Oversampling at 88.2 kHz and 96 kHz,

and 2× Oversampling at 176.4 kHz and 192 kHz

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>102-dB Dynamic Range

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THD+N < 0.1%

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20-Hz–20-kHz Flat Noise Floor for 44.1-, 48-,

88.2-, 96-, 176.4-, and 192-kHz Data Rates

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Digital De-Emphasis for 32-, 44.1-, and

48-kHz Data Rates

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Flexible Automute Logic With Programmable Threshold

and Duration for Noise-Free Operation

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Intelligent AM Interference Avoidance

System Provides Clear AM Reception

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Power-Supply Volume-Control PSVC Support for Enhanced

Dynamic Range in High-Performance Applications

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Adjustable Modulation Limit

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General Features

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Automated Operation With an Easy-to-Use

Control Interface

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I2C Serial Control Slave Interface

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Integrated AM Interference Avoidance

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Single 3.3-V Power Supply

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64-Pin TQFP Package

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5-V Tolerant Inputs