Thank you guys for all your help! I asked ChatGPT to help me write a descriptive post so that I could get targeted help. I'm glad it was useful. But I'm still having trouble with it and it's looking like the issue is with the PGA. It has a very specific SPI command structure and timing requirements ...

Hardware Setup:


Microcontroller : ESP32 DevkitC V4
Analog IC : TI PGA280AIPWR (TSSOP-24 package)
Connection Method : SPI (VSPI on ESP32)
Power Supply :
ESP32: USB powered (3.3V logic)
PGA280: DVDD connected to ESP32's 3.3V
VSP: External power supply (+12V)
VSN: External power supply ...