Dear experts,
I am designing charge amplifier cuicuit to convert charge to voltage output for accelerometers' aquisition circuit.
Sensitivity of the charge amplifier is 10pc/g. I want a sensitivity of 100mV/g. The mission profile is 150degreeC. REF_SHK is 2.5V.
I designed the circuit like this:
Do you have any concern about the circuit?
Op-amp for the first stage should be low input bias current op-amp. How low should the input bias current be so that it won't affect accuracy of the circuit?
Do you have any suggstions about which op-amp should I use?
Thank you very much and have a nice day!
Best Regards,
Xiaoxiao