I have a problem that I can not figure it out how solve or where the problem is.
Some of my boards that uses ad8221 or ad620. If I touch ic package output shifts. Some boards when touch IC nothing happens. The boards that have shifting problem seems to work unstable. output shift very easily with mechanical movement of the board too. I have hand soldered the parts but I have also aseebmled them with proper soldering company too. Sometimes I have same problem on those boards too.
I am amplifying loadcell signal. I could not figure it out do I have a design issue or something wrong in production.
Also When I put my finger near 1.5K resistors output shifts too.
I have replaced ad8221 with a new one. again same problem.
Any idea, help is appriciated
[edited by: dclm at 10:37 AM (GMT -4) on 2 Nov 2023]