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TMP422: Remote temp pulse about +/-1C when the remote thermal sensor is floating.

daniel
Genius 5095 points
Part Number: TMP422

Hi team,


We use TMP422 and the remote pin connect to the thermal sensor by a cable.

If we remove the thermal sensor, we still get +/-1C pulse from I2C remote temperature register. Is it a normal symptom?

In addition, when we use finger press on TMP422 top case, the local temp and remote temp (also disconnect thermal sensor), both temperature ramp up obviously. Is it a normal symptom?

Please kindly help

Thanks