WM8785: Stereo ADC



The WM8785 is a stereo audio ADC with differential inputs designed for high performance recordable media applications. Data is provided as a PCM output.

Stereo 24-bit multi-bit sigma-delta ADCs are used with digital audio output word lengths of 16 to 32 bits, and sampling rates from 8kHz to 192kHz. The device has a selectable high pass filter to remove residual DC offsets. The device also supports a TDM bus for data out.

The device is controlled via a 2 or 3 wire serial interface. The interface provides access to all features including oversampling rate, audio format, powerdown, master/slave control and digital signal manipulation. The device is supplied in a 20-SSOP package.


  • SNR 111dB (‘A’ weighted @ 48kHz)
  • THD -102dB (at -0.1dB)
  • Sampling Frequency: 8 – 192kHz
  • 2 or 3 Wire Microprocessor Control Interface
  • Master or Slave Clocking Mode
  • Programmable Audio Data Interface Modes
  • I2S, Left, Right Justified or DSP
  • 16/20/24/32 bit Word Lengths
  • A TDM bus is supported for data out
  • Supply Voltages - Analogue 4.5 to 5.5V
  • Digital core: 2.7V to 3.6V
  • 20-pin SSOP package