My current measuring circuit goes like this .
Shunt resistor - first opamp amplifier - second opamp for offsetting to my ADC range - low pass filter with Fc at 20Hz - then multiplexer - then ADC.
I have 12 channels which goes into this multiplexer. should I use low pass filter between multiplexer and ADC or before the multiplexer as I lined out above?
Shunt resistor - first opamp amplifier - second opamp for offsetting to my ADC range - low pass filter with Fc at 20Hz - then multiplexer - then ADC.
I have 12 channels which goes into this multiplexer. should I use low pass filter between multiplexer and ADC or before the multiplexer as I lined out above?