I would like to know if ADG732 is able of multiplexing analog DC signals ranging from 1 or 5 mV to 50mV. If not, what multplexer would you recommend? Since I have many channels I wouldn´t like to amplify before multiplexing.
It's a question of the system accuracy and speed you require. If the mux has 1 ohm on resistance,
and you have a 100 load on the output, you have a two resistor voltage divider, so Vout = (100/101)*Vin.
Also, if the capacitance of the mux is 10pF or 100pF or ??, and you have 1k source impedance, you
have an R-C low pass filter.
I personally would amplify as close to the source as possible to get the signal out of the noise,
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