Hook into I2S to create an analog output

Sunkan

Member
2020-02-05 2:47 pm
I have a smart speaker with a PCM5101A chip and would like to hook into the I2S input te generate a clean audio signal. I have tried hooking into the analog outputs from the PCM5101A chip, but have been disappointed with the result. I am looking into using something like this device (audio - How to make PCM5102 DAC work on Raspberry Pi ZeroW? - Raspberry Pi Stack Exchange) to have a separate audio signal that is not being shared with the rest of the PCB that is holding the PCM5101A chip.

Here is the pin configuration of the chip I want to steal the I2S signal from:

Screenshot-2020-02-06-at-10-17-49.png
 

Sunkan

Member
2020-02-05 2:47 pm
Thanks for your reply!

I created a schematic for the solution you proposed.

  1. What about VIN? Shouldn't it be connected to pin 20?
  2. Pin 8 says "analog power supply 3.3V" on the datasheet. Do I need to connect it to A3V3 in order to power the analog outputs?
  3. About SCK / BCK, do you mean that I will only need one of those?

Screenshot-2020-02-06-at-11-31-57.png