Features and Benefits

  • 8 channels of PDM audio inputs from digital microphones
  • 16×, 32×, or 64× decimation ratio of PDM to PCM audio data
  • 24-bit resolution to support high sound pressure level (SPL) microphones
  • 126 dB A-weighted SNR
  • 4 kHz to 192 kHz output sampling rate
  • Bit clock rates of 64×, 128×, 192×, 256×, 384×, or 512× the output sampling rate
  • Dual output PDM clocks
  • Automatic PDM clock generation
  • Automatic power-down when BCLK removed
  • Selectable I2C control or hardware mode operation
  • 1.2 mA DVDD operating current for 8 channels at 48 kHz frequency sampling rate and 1.8 V supply
  • Slave I2S or TDM output interface
  • Up to TDM-16 supported
  • Configurable TDM slot routing and sizes
  • I/O supply voltage from 1.70 V to 3.63 V
  • DVDD supply voltage from 1.10 V to 1.98 V
  • <5 μA typical DVDD shutdown current
  • 16-lead, 3 mm × 3 mm, 0.50 mm pitch LFCSP
  • Power-on reset

Product Details

The ADAU7118 converts four stereo pulse density modulation (PDM) bitstreams into one pulse code modulation (PCM) output stream. The source for the PDM data can be eight microphones or other PDM sources. The PCM audio data is output on a serial audio interface port in either inter-IC serial (I2S) or time domain multiplexed (TDM) format.

The ADAU7118 is specified over the commercial temperature range (−40°C to +85°C). The ADAU7118 is available in a 16-lead, 3 mm × 3 mm, 0.40 mm pitch, lead frame chip scale package (LFCSP).

Note that throughout this data sheet, multifunction pins, such as ADDR/CONFIG, are referred to either by the entire pin name or by a single function of the pin, for example, ADDR, when only that function is relevant.


  • Microphone arrays
  • Mobile computing
  • Portable electronics
  • Consumer electronics
  • Professional electronics

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.