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The best way to get rid off common mode noise at ADC inputs in remote measurement

Question asked by HAW on Nov 10, 2016
Latest reply on Nov 23, 2016 by jcolao

I have to measure DC voltage using 7175-2 pseudo-differentially over 1-2 m wires. In order to avoid any voltage drop in wires the built in input buffers would be enabled, thus there almost no current flow. I expect the wires to catch significant common mode noise from RF to 50 Hz power grid.

Most materials about common mode noise that I found, consider it in the context of power line that involve common-mode chokes. However, I am not sure if this is suitable for my measurement.

Also there are conventional common mode RC filters, but I am not sure if they will be good enough

common mode filters

 

Which else possibilities are there to suppress common mode noise, and what is the best method for a measurement application?

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