The issue is I am trying use Pmod AD1 (ADC) for connecting to VCU118 pmod port, It is not giving an accurate conversion of analog input, the signal keeps changing (please see in the attached image) even when the analog input is constant?
What would be the exact reason for this?
My query is which side (A 1.8v or B 3.3V ) we need to use for connecting PMOd AD1? (When I measured the PMod Vcc and Gnd it's showing 3.3V).
How to use the level shifter for side A or B?
The same design I was implemented on the Nexys Spartan 6 board, it is working perfectly. Just I changed the XDC file for connecting to VCU118 (pins from AV16 to AT16)