The D2 Audio DSP D2-1 Family (D2-81412, D2-81431, D2-81433, and D2-81435) is a fully self-contained 4-channel digital amplifier controller System-On-Chip (SOC). The D2-1 Family enables rapid system design for manufacturers of home theater receivers, multi-room distributed audio systems, and powered speakers. The D2-1 Family contains a high-performance digital switching controller to play any input source on any output channel. A configurable audio signal processor provides equalization, volume control, tone control, and compression for each channel, as well as crossover and power limiting for powered speaker applications. The D2-1 Family includes 4-channels I2S/left-justified inputs (16-bit to 24-bit, 32kHz to 192kHz) and an optional S/PDIF receiver (16-bit to 24-bit). Boot options include: Self-boot from an external serial ROM, asynchronous SCI slave boot, and serial slave boot from a host microcontroller.


  • Powerful digital audio management: design dependent SRC, routing, mixing, multiple digital audio I/O, tone control, parametric EQ, and compression
  • Reduced audio system cost for manufacturers of Class-D audio amplifiers
  • Audio processing features enable optimized speaker performance and deliver dramatically improved sound quality
  • Minimum development cost/risk/time-to-market
  • Pure digital path
  • Superior dynamic range
  • >110dB SNR, <0.1% THD+N
  • 20Hz-20kHz ±0.5dB frequency response

Complete Class-D Amplifier Controller SOC

  • Digital switching controller
  • Flexible audio input sources
  • Multiple controller synchronization
  • Bridge and non-bridged output topologies
  • Standalone or microcontroller boot option
  • Four channels
  • Pb-free (RoHS compliant)

High-Performance Sound

  • Unique performance for each part number
  • Superior dynamic range
  • >110 dB SNR, <0.1% THD+N
  • 20Hz-20kHz ±0.5dB frequency response

Graceful Protection and Recovery

  • Complete short-circuit, overcurrent, and overvoltage fault protection

Pure Digital Path

  • Digital audio inputs support I2S and left-justified formats with linear PCM (32kHz to 192kHz, 16-bit to 24-bit)
  • Digital audio input supports S/PDIF format with linear PCM (32kHz to 192kHz, 16-bit to 24-bit)

Multiple Part Offerings

  • D2-81412-LR: 144 Ld LQFP supports D2 Audio DSP Sound Enhancement Algorithms
  • D2-81431-LR: 128 Ld LQFP supports D2 Audio DSP Sound Enhancement Algorithms
  • D2-81435-LR: 128 Ld LQFP supports D2 Audio DSP Sound Enhancement Algorithms and DTSTM (SRS) Technology

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active LQFP Tray 900

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
D2-81412, D2-81431, D2-81433, D2-81434, D2-81435 Datasheet Datasheet PDF 1.18 MB
D2-1 Family Audio SOC Datasheet Datasheet PDF 1.08 MB
User Guides & Manuals
TXS25-4 Evaluation Kit User Guide Manual PDF 1.05 MB
Application Notes & White Papers
R32AN0007: Output Filter Design Selection Application Note PDF 184 KB
R32AN0006: Writing to EEPROM or SPI Flash Memories using an External Microcontroller Application Note PDF 147 KB
R32AN0002: D2 Audio Customization GUI v3I Sound Processing and Audio Algorithms Application Note PDF 297 KB