Product: SKU: ZADSR165PROXR
We use this board for ESS Testing our product. We use one of the analog inputs to read the voltage from a temperature sensing circuit inside a temperature chamber. The software shows the temperature reading is not stable. I used the NCD Base software to read the analog input in loop mode. The numbers coming back are ranging as much as 21 numbers while the temperature is stable. A voltmeter on the input to the board shows the voltage is stable, much more stable than the readings from the software would indicate. For instance, at one point, I was reading 10-bit values between 205 to 223, which corresponds to a voltage between 1.0019V and 1.1045V - while the voltmeter was reading 1.053V ±3mv. The values read back correspond to about 60°C to 70°C - while the actual temperature was 65°C.
Is this expected behavior for this board? Or should it be replaced?