defragster
Senior Member+
Working with someone where PCB under development showed AGND routed to GND I had a hard time definitively advising against the need or desire for that to support simple pots.
Not sure about the alternate hardware that gave that understanding and I could not find a single specific point of reference to back up my general understanding of why that was not needed and not good for Teensy 3.x's - when the AGND has some higher purpose. Using a pre-production PCB confirmed it worked but wasn't convincing - so I linked to PJRC store's two 16 bit Audio shields and the Audio Tutorial board and that was as close as I could get.
Paul or someone care to offer some guidelines or links I missed?
So it seems the Teensy uses a different sort of grounding system to what I'm used to. There must be some sort of connection on the Teensy from digital ground to the ADC circuitry. I haven't come across that in the past where there has been a separate AGND.
If it all works fine without requiring a connection to AGND then I can just get rid of it.
Not sure about the alternate hardware that gave that understanding and I could not find a single specific point of reference to back up my general understanding of why that was not needed and not good for Teensy 3.x's - when the AGND has some higher purpose. Using a pre-production PCB confirmed it worked but wasn't convincing - so I linked to PJRC store's two 16 bit Audio shields and the Audio Tutorial board and that was as close as I could get.
Paul or someone care to offer some guidelines or links I missed?