I'm trying to come up with a way that I can multiplex the signals from say, 16 strain gauges. The output of the multiplexer would go to an instrumentation amplifier, and then to an ADC.
Considering that strain gauge signals are in the order of mV's, I am concerned about the inherent 'Ron' of the multiplexer. I am also thinking that the Ron won't matter though? Because the signal is getting boosted by the In-amp
It might matter with the 'flatness' of the multiplexer, but perhaps not because all the strain gauges will be zeroed by their original offset (data-data).
What do you guys think?
Thank you for anytime you can lend to this!
I'm trying to do the same thing. Have you find a way to multiplex between the strain gauges ?
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