Other Parts Discussed in Thread: LMP7731, OPA325, OPA376
Hi,
I am planning to use OPA378 for interfacing a thermopile that has 68kOhm series resistance. circuit attached. On the non-inverting input, i have the thermopile.
1. Due to the imbalance in the series resistors on inverting and non-inverting terminals of the opamp, will this circuit cause any errors? (due to bias currents and auto zero feature)
2. adding a capacitor to Gnd on the non-inverting terminal will help in filtering the input?
3. due to the auto calibration at 350kHz, it is mentioned in datasheet that " no aliasing or flicker noise". i believe this is about the 1/f noise at very low frequencies. but that is the effect of this auto calibration on the output? need recommendation on the output filtering.