TAS5727 - 25-W Digital Audio Power Amplifier with EQ and 2-Band DRC

The TAS5727 is a 25-W, efficient, digital-audio power amplifier for driving stereo bridge-tied speakers. One serial data input allows processing of up to two discrete audio channels and seamless integration to most digital audio processors and MPEG decoders. The device accepts a wide range of input data and data rates. A fully programmable data path routes these channels to the internal speaker drivers.

The TAS5727 is a slave-only device receiving all clocks from external sources. The TAS5727 operates with a PWM carrier between a 384-kHz switching rate and a 288-KHz switching rate, depending on the input sample rate. Oversampling combined with a fourth-order noise shaper provides a flat noise floor and excellent dynamic range from 20 Hz to 20 kHz.

• Audio Input and Output
  • 25 W Into an 8-Ω Load From a 20-V Supply
  • Wide PVDD Range, From 8 V to 26 V
  • Supports BTL Configuration With 4-Ω Load
  • Efficient Class-D Operation Eliminates Need for Heatsinks
  • One Serial Audio Input (Two Audio Channels)
  • I²C Address Selection Pin (Chip Select)
  • Single Output Filter PBTL Support
  • Supports 44.1-kHz to 48-kHz Sample Rate (LJ/RJ/I²S)
• Audio and PWM Processing
  • Independent Channel Volume Controls With Gain of 24 dB to Mute With 0.125-dB Resolution Steps
  • Programmable Two-Band Dynamic-Range Control
  • 18 Programmable Biquads for Speaker EQ and Other Audio-Processing Features
  • Programmable Coefficients for DRC Filters
  • DC Blocking Filters
• General Features
  • I²C Serial Control Interface Operational Without MCLK
  • Requires Only 3.3 V and PVDD
  • No External Oscillator: Internal Oscillator for Automatic Rate Detection
  • Surface-Mount, 48-Pin HTQFP Package
  • Thermal and Short-Circuit Protection
  • 106-dB SNR, A-Weighted
  • AD, BD, and Ternary Modulation
  • Up to 90% Efficient
  • PWM Level Meter to Measure the Digital Power Profile
• Benefits
  • EQ: Speaker Equalization Improves Audio Performance
  • Two-Band DRC: Dynamic Range Compression. Can Be Used As Power Limiter. Enables Speaker Protection, Easy Listening, Night-Mode Listening
  • Autodetect: Automatically Detects Sample-Rate Changes. No Need for External Microprocessor Intervention