I measure DC pseudo-differentially over 1-2 m wires. In order to avoid any voltage drop in wires the built in ADC input buffers are used, thus there almost no current flow. I expect the wires to catch a lot of 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. Howver, I am not sure if this is suitable for my measurement.
Another way is the vanilla common mode filter
But again, I am not sure if it would be good enough and provide adequate level of filtering.
Moreover, there might be more methods that I am not aware of.
What possibilities are there to suppress common mode noise, and what is the best method for a measurement application?
In addition, how much the application of a shielded twisted pair cable would help to ease the problem?