Part Number:OPA388
Hello Sir:
I am trying to build a precision Current to Voltage transfer circuit by OPA388.
As follow, load is R2(10k)
After build it on breadboard, I test it and find out a noise when input is open. And it will stay there with or without input.
If I remove C1, the noise will increase to 15 mV(pk-pk), no frequency change. (I use C2 for measure)
could you please help check where I made mistake?
thanks
zx