I have a two-wire Pt100 element and a 5V ADC and want to measure the temperature. I have made a wheatstone bridge like below and connected it to an instrumentation amp. No matter the resistance of the Pt100 the output is always ~0.3V. Knowing little about electronics, I suspect this is because the negative terminal is clipped as the op amp is trying to bring it below 0V.
One solution would be to use -5V instead of 0V as Vs-, however I do not have -5V available.
How do you use an instrumentation op amp in such a scenario?