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INA282: Min/max or standard Deviation of Differential impedance

Part Number: INA282
Other Parts Discussed in Thread: MUX36D08, INA190

This INA282 data sheet states that the differential input impedance is typically 6 KOhm.

We would like to use the MUX36D08 in front of the INA282 to monitor currents on 8 different rails.

The MUX36D08 puts ~125 Ohms of resistance in series with each input of the INA282.  Working against the input impedance of the INA282, this causes an error of about 4%.

We may be able to tolerate this and account for it, but it would be very useful to have some boundaries on the input impedance so that we can understand the boundaries of this error.

Can you please let us know if there is a min/max for the differential input impedance or a standard deviation that you can provide?

Thanks, best, Steve