Other Parts Discussed in Thread: OPA340
Dear expert,
My customer is evaluating OPA355 in a schematic as below, OPA355 is enabled:
Here are the parameters. The input current is 10nA~1mA, generated by the photodiode after receiving the laser light flows from the negative electrode to the anode of the photodiode. The resistor is 1K~100k (changed by current), capacitance is 0.7pF,
However the output is not changed according to Vout = Vref -I*R. If they replace OPA355 with OPA340, the output is Vout=Vref - I*R. Is there something wrong with the current design? Thanks.