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Analog Devices Inc. ADAU1787 Low Power Codec with Audio DSPs

Analog Devices Inc. ADAU1787 Low Power Codec with Audio DSPs offer four inputs and two outputs that incorporate two digital signal processors (DSPs). The analog input path to the DSP core to the analog output is optimized for low latency and is suitable for noise-canceling headsets. The ADI ADAU1787 provides a complete headset solution with the addition of just a few passive components.

Features

  • Programmable FastDSP audio processing engine
    • Up to 768kHz sample rate
    • Biquad filters, limiters, volume controls, mixing
  • 28-bit SigmaDSP audio processing core
    • Visually programmable using SigmaStudio
    • Up to 50 MIPS performance
  • Low latency, 24-bit ADCs and DACs
    • 96dB SNR (signal through PGA and ADC with A-weighted filter)
    • 105dB combined SNR (signal through DAC and headphone with A-weighted filter)
  • Serial port fSYNC frequency from 8kHz to 768kHz
  • 5μs group delay (fS = 768kHz) analog in to analog out with FastDSP bypass (zero instructions)
  • 4 single-ended analog inputs, configurable as microphone or line inputs
  • 8 digital microphone inputs
  • 2 analog differential audio outputs, configurable as either line output or headphone driver
  • PLL supporting any input clock rate from 30kHz to 27MHz
  • Full-duplex, 4-channel ASRCs
  • 2, 16-channel serial audio ports supporting I2S, left justified, or up to TDM16
  • 8 interpolators and 8 decimators with flexible routing
  • Power supplies
    • Analog AVDD at 1.8V typical
    • Digital I/O IOVDD at 1.1V to 1.98V
    • Digital DVDD at 0.9V typical
  • Low power (11.079mW for typical stereo ANC settings)
  • I2C and SPI control interfaces, self boot from I2C EEPROM
  • Flexible GPIO
  • 42-ball, 0.35mm pitch, 2.695mm × 2.320mm WLCSP

Applications

  • Noise cancelling handsets, headsets, and headphones
  • Bluetooth ANC handsets, headsets, and headphones
  • Personal navigation devices
  • Digital still and video cameras
  • Musical instrument effect processors
  • Multimedia speaker systems
  • Smartphones

Functional Block Diagram

Block Diagram - Analog Devices Inc. ADAU1787 Low Power Codec with Audio DSPs
Published: 2021-04-07 | Updated: 2022-03-11