If I want to measure ambient more accurately, should I remove the ground or any plane under LM57 to limit the heat picking up from the board?
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If I want to measure ambient more accurately, should I remove the ground or any plane under LM57 to limit the heat picking up from the board?
Hi Khoi,
In order to pick up ambient temperature accurately and fast, yes you should remove any ground or power plane beneath the device. If it is possible, you might need to think about the isolation island. The apps note should have all the details.
Let me know if you have further question.
Aaron