I am using OPA4188AIPWR for low side current sensing circuit. In the normal condition output I am getting is OK but if I introduce noise at the input I am not getting the exact waveform it's a noisy one. I am using first order low pass filter at the output of the OPAMP. Is there any other filter design I can use so that I get the desired waveform. If you suggest it would be helpful. FYI The output of the circuit goes to ADC.