Hi, I don't know, if here is the right place to ask this kind of question but i have a weird problem about AD620 IA. I purchased 6 (six) AD620 and tested them if they are working. All of them did not seem working as an IA. But wen i decided to try it to work as an single opamp, they worked. I tried them gain of 10 and 1000 with inverting and non-inverting mode. Is there anyone met this kind of problem. They are working as an single opamp not an instrumentation amplifier.
The package marking on devices are all same, the marking is: AD620ANZ #1839 1780933
Where did you buy them? I would suspect counterfeit parts. Someone bought op amps for five cents apiece
an remarked them so they could sell them at a dollar. Scam been going on for 25+ years...
Thanks for sharing the document, well explaining the counterfeit parts. I don't know what is happened this IC's, here is the
photos of one IC, what is your idea?
Can't tell much from the picture. It could be you hooked them up wrong.
Are you trying to use on single supply?
Post your schematic.