Hi Reinhard, Jonathan,
Thanks for the response, I meant STBY it's a typo.
I am using AD7606 Evaluation board, so REF SELECTION is on external I guess, (R6, R20 are in place thought the eval data sheet says other wise, little confusing here.)
Supply Voltages
Avcc = +5v
Vdrive = 5v & 3.3v Tried with both options.
For 0V Input I did 2 things
1. Remove jumper, connect to 0V from the supply.
2. Didn't remove the jumpers in the Eval board. In both case I have same behaviour.
I will try out connecting ch1 to ground directly and check.
I will get back with more timing diagrams
1 doubt wrt earlier timing diagrams, I see a CONVST pulse but I don't see a corresponding BUSY pulse in some cases, still I see ~CS activity. It's kind of confusing.
From Code, Activities to ~CS, DoutA is happening in ISR of BUSY interrupt alone.
Note: I am currently using only 1 channel.
Regards
Simba