Cap or Capless Audio ADC

The Innosilicon Audio Codec is a 24-bit solution that supports both cap and capless outputs from mono up to 7.1 surround sound. Based on a Sigma-Delta noise-shaping technique with full path filters, the Codec is low power while providing 95dB SNR in DAC and 93dB SNR in ADC.

A self-contained solution, the ADC, DAC and power amplifier are all integrated to create a reliable solution that is both low in noise and small in size. . This impressive Audio Codec is suitable for applications in high end consumer, automotive, multimedia and many other digital audio systems.


  • All major processes fully covered, such as 110nm, 55nm to 28nm, 22nm, 14nm, 12nm, 8nm, 7nm, 6nm, 5nm.

  • 24 bit DAC with 95dB SNR

  • 24 bit ADC with 93dB SNR

  • Supports cap or capless output with impedances from 16Ω to 32Ω with custom analog pads

  • Microphones can either be single ended or differential while the Automatic Level Control provides smooth audio recording

  • Contains no mixed signal circuitry for a smaller solution with simple, but flexible, integration

  • Uses core voltage for the Codec and IO voltage for the IO. No special power requirements

  • Small die size (28nm) 0.5mm2 for ADC or DAC path, 1.62mm2 for complete stereo Codec

  • Low power (28nm) 6mW for stereo playback, 7mW for stereo recording and less than 5μA in standby

  • Mono, Stereo, 5.1 and 7.1 surround sound support

  • Programmable input and output analog gains

  • Integrated digital interpolation & decimation filters

  • Sampling rate support for: 8, 12, 16, 24, 32, 44.1, 48 and 96kHz

  • A fractional PLL supporting 6MHz to 20MHz input reference clocks is an available option


  • Low power consumption

  • Fully customizable

  • Small area

  • Simple integration process

  • Available options include:

  • FPGA integration support

  • Chip level integration