Digital Audio Processor 64-Pin TQFP Tray

The TAS5518C is an 8-channel digital pulse-width modulator (PWM) that provides both advanced performance and a high level of system integration. The TAS5518C is designed to interface seamlessly with most audio digital signal processors. The TAS5518C automatically adjusts control configurations in response to clock and data rate changes and idle conditions. This enables the TAS5518C to provide an easy-to-use control interface with relaxed timing requirements. The TAS5518C can drive eight channels of H-bridge power stages. Texas Instruments power stage parts TAS5111, TAS5112, or TAS5182 with FETs are designed to work seamlessly with the TAS5518C. The TAS5518C supports either the single-ended or bridge-tied-load configuration. The TAS5518C also provides a high-performance, differential output to drive an external, differential-input, analog headphone amplifier (such as the TPA112). The TAS5518C uses AD modulation operating at a 384-kHz switching rate for 48-, 96-, and192-kHz data. The 8× oversampling combined with the fifth-order noise shaper provides a broad, flat noise floor and excellent dynamic range from 20 Hz to 20 kHz. The TAS5518C is a clocked slave-only device. The TAS5518C receives MCLK, SCLK, and LRCLK from other system components. The TAS5518C accepts master clock rates of 128, 192, 256, 384, 512, and 768 fS. The TAS5518C accepts a 64-fS bit clock. The TAS5518C allows for extending the dynamic range by providing a power-supply, volume-control (PSVC) output signal.

General Features

• Automated Operation With an Easy-to-Use
  Control Interface
• I²C Serial-Control Slave Interface
• Integrated AM Interference-Avoidance Circuitry
• Single, 3.3-V Power Supply
• 64-Pin TQFP Package
• 5-V Tolerant Inputs

Audio Input/Output

• Automatic Master-Clock-Rate and
  Data-Sample-Rate Detection
• Eight Serial Audio Input Channels
• Eight PWM Audio Output Channels Configurable as
  Six Channels With Stereo Lineout or Eight Channels
• Line Output Is a PWM Output to Drive an External
  Differential-Input Operational Amplifier
• Headphone PWM Output to Drive an External Differential
  Amplifier Like the TPA112
• PWM Outputs Support Single-Ended and Bridge-Tied Loads
• 32-, 38-, 44.1-, 48-, 88.2-, 96-, 176.4-, and
  192-kHz Sampling Rates
• Data Formats: 16-, 20-, or 24-Bit Left-Justified, I²S,
  or Right-Justified Input Data
• 64-f_S Bit-clock rate
• 128-, 192-, 256-, 384-, 512-, and 768-f_S
  Master Clock Rates (Up to a Maximum of 50 MHz)

Audio Processing

• 48-Bit Processing Architecture With 76 Bits of
  Precision for Most Audio-Processing Features
• Volume Control Range 36 dB to –127 dB
  • Master Volume Control Range of 18 dB
    to –100 dB
  • Eight Individual Channel Volume Control
    Ranges of 18 dB to –127 dB
• Programmable Soft Volume and Mute Update Rates
• Four Bass and Treble Tone Controls With =18-dB Range,
  Selectable Corner Frequencies, and Second-Order Slopes
  • L, R, and C
  • LS, RS
  • LR, RR
  • Sub
• Configurable Loudness Compensation
• Two Dynamic Range Compressors With Two Thresholds,
  Two Offsets, and Three Slopes
• Seven Biquads Per Channel
• Full 8×8 Input Crossbar Mixer. Each Signal-Processing
  Channel Input Can be Any Ratio of the Eight Input channels.
• 8×2 Output Mixer, Channels 1–6. Each Output is a Mix
  of Any Two Signal-Processed Channels. It is Recommended to
  Use the Pass-Through Output Mixer Configuration.
• 8×3 Output Mixer, Channels 7 and 8. Each Output Is aMix of
  Any Three Signal-Processed Channels. It Is Recommended to Use
  the Pass-Through Output Mixer Configuration.
• Three Coefficient Sets Stored on the Device Can Be Selected
  Manually or Automatically (Based on Specific Data Rates).
• DC Blocking Filters
• Able to Support a Variety of Bass Management Algorithms

PWM Processing

• 32-Bit Processing PWM Architecture With 40 Bits of Precision
• 8× Oversampling With Fifth-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
• >110-dB Dynamic Range
• THD+N < 0.1%
• 20-Hz–20-kHz, Flat Noise Floor for 44.1-, 48-, 88.2-, 96-,
  176.4-, and 192-kHz Data Rates
• Digital De-Emphasis for 32-, 44.1-, and 48-kHz Data Rates
• Flexible Automute Logic With Programmable Threshold and Duration
  for Noise-Free Operation
• Intelligent AM Interference-Avoidance System Provides
  Clear AM Reception
• Power-Supply Volume Control (PSVC) Support for Enhanced
  Dynamic Range in High-Performance Applications
• Adjustable Modulation Limit