I am currently trying to develop a PCB circuit using AD8557 to amplify a wheatstone bridge. However, I have some questions regarding the supply voltages and communication voltages. I am connecting the amplifier to a board that outputs 3.3V on digital pins. So, my question is,
According to the AD8557 datasheet one can use AVDD and DVDD as supplies. If I set the excitation voltage of the bridge as 5V, the AVDD = 5V and DVDD = 3.3V, when trying to configure the AD8557 gain and offset, will it work? Since the microcontroller board outputs 3.3V in the digital pins?
What if I set the AVDD=DVDD=5V, will I be able to configure the AD8557 in simulation mode, using 3.3V TTL?
Thanks in advance!
added excitation voltage
[edited by: Ledeir at 2:33 PM (GMT -5) on 16 Nov 2021]