Other Parts Discussed in Thread: LMT84,
One our customer is using LMT84-Q1 and observing misbehavior around 108 deg C, the output reference from the device starts increasing at 108 degC indicating that the temperature is getting reduced after 108deg. The device is used to measure the temperature of 3phase inverter power stage and near to the switching mosfets, 2 LMT84 are used at different locations to measure the power stage temperature and given to controller ADC for average temp measurement. Misbehaving issue is observed at one location were the output track is routed between power tracks,we cut this track and connect the signal directly to ADC using wire but the same issue repeated.
Attached is the schematic, layout and temperature plots for your reference. Can you please help with feedback and observations to rectify this issue.
Thanks in advance for your help and support.