Post Go back to editing

ADC channel change (AIN)

Why are the AIN1,2 and AIN3,4 values ​​different when nothing is physically connected to the Aducm363 ADC channel?
I checked in the process of receiving 16 data for each AIN channel.

I have attached the photo below.
If it's wrong, I'd appreciate it if you could tell me how to change it.

Note. I am currently changing the channel in the interrupt statement.