Hi Team
My customer faced abnormal temp data was read from LM73.
Would you advise below inquiry from the customer?
Q, How acceptable is the noise tolerance of the Vdd line?
A fault occurs with Vdd where ± 250mV spike noise is superimposed on 3.3V.
The recommended voltage is 2.7V or more and 5.5V or less according to the specifications.
Temperatures lower than around 68 ° C indicate normal values.
At around 68 ° C, a failure occurs, and the readings at that time are 58 ° C and 103 ° C
(also when it is 85 ° C). It becomes stable again when the actual temperature exceeds around 70 ° C.
I saw below E2E advice, however our case occurs in recommendation Vdd range.
Any advise should be highly appreciated,
And I can send Vdd waveform if you provide email address because this is customer's data.
Thanks
Best regards,
Shidara
