the signal became digital signal after the ADC, right
No. The analogue and digital sections are completely separate.
Pin 1 digital != pin 1 analogue
Can you post your schematic, and some reference to the signal you're trying to read?
the signal became digital signal after the ADC, right
No. The analogue and digital sections are completely separate.
Pin 1 digital != pin 1 analogue
Can you post your schematic, and some reference to the signal you're trying to read?