Search found 2 matches

by aknickolai
Fri Nov 07, 2014 9:37 pm
Forum: AVR Microcontrollers
Topic: AVR Anolog to Digital Conversion Errors
Replies: 5
Views: 2403

Re: AVR Anolog to Digital Conversion Errors

AREF makes since for sure. I guess I don't need one on AVCC, since eliminating that cap gets rid of my A2d error and I would keep the filtering on AREF. Thanks!
by aknickolai
Thu Nov 06, 2014 5:11 pm
Forum: AVR Microcontrollers
Topic: AVR Anolog to Digital Conversion Errors
Replies: 5
Views: 2403

AVR Anolog to Digital Conversion Errors

So I've always put small 100nF caps on AVCC and AREF when I need to do analog to digital conversions on my atmel chips. Everything worked, but I just got an LCD working and I'm getting a ~15% error between what my meter and the A2D are claiming the voltage is. If I remove the cap on either AVCC or A...