Naumy
Newbie level 1
Hi,
I have a working code for DC excitation of AD7730. To run it in AC excitation mode, I just changed the AC bit of the filter register from 0 to 1. It is now working in AC mode and also giving test counts but the test counts have reduced to very low level.
For eg: At 5mV in DC exct., I got 50,000 test counts, but for the same voltage i am getting only 7000 test counts or less. I can use dac register to shift it but i need a good gain as i increase the voltage input. I have kept the gain same in both the cases and everything else is same.
Could anyone suggest me something on this?
I have a working code for DC excitation of AD7730. To run it in AC excitation mode, I just changed the AC bit of the filter register from 0 to 1. It is now working in AC mode and also giving test counts but the test counts have reduced to very low level.
For eg: At 5mV in DC exct., I got 50,000 test counts, but for the same voltage i am getting only 7000 test counts or less. I can use dac register to shift it but i need a good gain as i increase the voltage input. I have kept the gain same in both the cases and everything else is same.
Could anyone suggest me something on this?
