I’m designing the AFE for a sensor that gives an output of 2-3Vpp.
My design for the AFE is the sensor output which goes to a 2.5m cable, then to a Centre tapped transformer (used for circuit isolation mainly), then to a unity gain instrumentation amplifier (for good CMRR), then to a band pass filter (my freq of interest is 500kHz) and then a notch filter (for 60Hz noise elimination).
I was just unsure if we can place a notch filter after a band pass filter? Or should the notch filter be placed before a band pass filter
I’m getting a lot of electromagnetic noise due to the 2.5 m cable and the power supply source low frequency noise and 60Hz noise which I’m trying to eliminate by designing the hardware to eliminate all the noise.
Please assist me. And which type of filter for both the band pass and notch filter be the best to use to get sharp cutoffs and accurate noise reduction with a clean signal output?