I have integrated LMT70 into my battery-powered node. My node is powered through 2 AAA batteries.
These temperature sensor nodes are deployed in the field and after running for 2-3 months, I get incorrect readings from my sensor. By incorrect reading, I mean any random value. High random values for temperature like 122, 121, -139, etc in degree Celcius.
I have attached my circuit diagram for LMT 70 sensor in my battery-powered node.
In the above circuit, LMT70 is placed on a small PCB having J8 and J9 connectors. A 3-meter wire is drawn from the J8-J9 connector and gets attached to my main node on the J7 connector where my SoC is present.
Kindly suggest something which can resolve this field issue where my sensor turns faulty post 2-3 months in the field.