======  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 [[https://www.cirrus.com/products/wm8786/|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 =====

  * [[http://www.cirrus.com/en/products/cs5364-66-68.html|cs5364]]

===== Related constructions and modules =====

  * [[en:usbi2s]]
  * [[en:audiointerface]]
  * [[en:sdr-widget|]]


===== References =====

  * [[http://www.netams.com/~anton/usb-adc/|Two-channel Analog-to-Digital converter board with USB interface]]
  * [[http://www.cirrus.com/en/products/cs5364-66-68.html|CS5364/66/68]]