We apply 7.5V supply to connector J2. Using 4.096 as Vref for AD7763. The input is differential. My question is if I get the Spread value from the software being 129340. How can I calculate the input signal amplitude? I read the AD7763 datasheet, but just get confused. From the schematic of AD7763 eval board, the input has gain 0.649. How about the scale 0.8 for the Vref?
Thank you so much.