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Impact of external Rtia when using internal LPRTIA on AD5940/ADuCM355

Category: Hardware
Product Number: AD5940 ADuCM355
Software Version: NA

Hello,

If there is an external RTIA resistor attached to the RC0_0 and RC0_1 pins, is the use of an internal LP Rtia impacted?  If I solder on a resistor in parallel to C17 on the ADuCM355 eval board then take a measurement (SWV example) on a resistive load the readings are not correct when using an internal Rtia setting.  If I remove the resistor and re-run then the expected values are measured.

Thanks you!