Hi All, I am putting together a basic circuit to add 10X gain to the output of an LM34 temperature sensor (to feed a voltmeter).
So have kludged together an op-amp in the classic non-inverting input configuration. (1+R2/R1)
Single supply, 12V.
The problem is that the output shows high linearity error. The input is DC so it is not related to frequency. At low input voltages the output is lower than it should be and at higher input voltages it is higher.
I have tried two op-amps, the LMC6081 and the LM324, they both show show error. I have tried different values of R2 and R1. I have put a series resistor in the output. No change.