GUMY
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I am experiencing strange behaviour of AD8607. It should be pA biass current and uV offset voltage Opamp, but simple voltage follower configuration shows this results:
Error seems to be related to source impedance as it dissapears if I connect Opamp input directly to voltage reference output (no potentiometer). But this make no sense regarding pA bias current...
I allready excluded some possible error sources:
-ground loops
-IC damage (same behaviour after replacement)
-Measuring accuracy
I am missing something, but what?
Error seems to be related to source impedance as it dissapears if I connect Opamp input directly to voltage reference output (no potentiometer). But this make no sense regarding pA bias current...
I allready excluded some possible error sources:
-ground loops
-IC damage (same behaviour after replacement)
-Measuring accuracy
I am missing something, but what?