Hello. I'm currently working in a project involving op amps as followers between 0 an 5 volts. Those op amps will be sampled at arduino's analog inputs. If I power them between 0 and 5 volts they will not work because they are not able to follow levels less than 1.8 volts. So I`m thinking to power …

Analog ref

system March 15, 2006, 9:29am 2

I have seen in Atmega's datasheet that analog pin has another purpose.
However I fixed up the problem using another model of op amp.
Thanks!

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