I'm testing my new Arduino Zero Pro and noticed that the ADC converter acts very unstabile. I updated the bootloader with the newest IDE (1.7.8) and run a basic analogRead() function. I connected the pins of an 10kOhm Potentiometer to GND/A0/3.3v.
Just tu mention - all cables are short and good quality.
Exactly the same configuration works just perfect on my uno and due board..
I tried this topic on arduino.org but nobody could really help.. :(