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en:adcaudio

Analog-to-digital converter for audio signals - ADCaudio01B

ADCaudio01B is an innovated version of an older module, with an already integrated crystal oscillator that eliminates the need for a further module that served as an external generator of a sampling clock. It uses ADC WM8786.

The main parameters are as follows:

	* Sampling frequency 8 - 192 kHz
* Distortion - 102 dB
* I²S  interface
* 24 bit resolution
* SNR 111 dB

ADCaudio01A

For testing purposes we used module [en:usbi2s|USBI2S01A]] as a host.

For CP2114, a configuration 0 works without a further setting up - so in case of CS42L55

  • DACSEL0 az DACSEL3 = L

For WM8786 a following configuration is functional:

  • MS0 = L
  • AUDIOF0 = L
  • AUDIOF1 = H
  • OSR0 = 0
  • OSR1 = 0

Board as connected as followed:

ADCaudio01A direction USBI2S01A
MCLK MCLK
BCLK SCK
LRCLK LRCK
DOUT SDIN

There seems to be a crosstalk between L and R channel.

Alternatives in circuits

References

en/adcaudio.txt · Last modified: 2018/12/17 14:52 (external edit)