I want to design a photodiode current amplifier circuit. The photodiode is Hamamatsu S5973 and the operational amplifier is AD8001. After proofing the PCB board, it is found that the light has no effect on the output voltage of the circuit.
Jessica Veröffentlicht am November 11, 2020
The input bias current of the op amp is higher than the working current of the photodiode, the op amp cannot work.
Jackson Veröffentlicht am November 11, 2020
If this is the case, how can it be resolved?
Samantha Veröffentlicht am November 11, 2020
Look for an op amp with a low input bias current. The lowest input bias current of a good op amp can reach the level of fA.
Ella Veröffentlicht am November 11, 2020
If the circuit is correct, it is recommended that the landlord re-adapt the op amp.
