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ADUCM361 Measuring the Thermistor having high resistance value

Category: Software
Product Number: ADUCM361

We are using ADUCM361 to measure the temperature sensor (Thermistor). The resistance of the thermistor varies from 2385 Ohm to 64880 Ohms. We are following the application note CN0359 to measure the this resistance. (Ratio-metric method). We are using 10uA of excitation current for measuring the resistance. We see the measured resistance values are accurate if the resistance is below 12300 Ohm. If the resistance values are above 12300 ohm then its not accurate. Is there any limitation in ADUCM361 to measure the higher resistance values?



We are following the application note CN0359 to measure the this resistance.
[edited by: Vinaya at 2:01 PM (GMT -4) on 6 Jun 2022]