Hello,
First of, I'm not familiar with Audio design. Therefore, I relied on datasheet and design references from AIC3210 (Mono) and AIC3110 (Stereo). The below design is able to use either Mono device or Stereo device, both have the same footprint and pin-out, except pin 30 is NC for Mono.
I believe I have the correct connection for Mic and Headphone in either Mono or Stereo. I think I do not have the correct connection for "Speaker". To reduce the BOM, I use the same jacks for Mic, Headphone, and Speaker.
At J8/J9, the pin-2 is for Left, pin-3 is for Right, pin-1 is sleeve and connects to GND, according to standard audio jack/plug pin-out. When you use Mono device, you install R124 & R125. When you use Stereo, you remove R124 & R125. So I have a few questions only for Speaker connection.
1. Should I use 2 jacks for Stereo? Or just 1 jack?
2. Should I leave pin 19 & 23 (U24) open in Stereo?
3. Do you see error at Speaker connection?
Thank you for your help.
