If someone could point me in the right direction to read more on this I'd be very grateful.
I have a LM324 configured as a simple voltage follower, single rail, output connecting back to inverting, and an input to the non-inverting. The output it is fed into an analog input of a ATMega328.
What i am noticing is that there is a -200mv discrepancy between the input and the output, i was expecting it follow withing the tolerance of the input offset (2mv).
Have i totally misunderstood this, and am i looking in the wrong place for this problem?