LMT70A: Design suggestions for LMT70A temperature sensing Layout PAD

Lin Yueh Feng

Part Number: LMT70A
Other Parts Discussed in Thread: LMT70, TMP117, TMP116

Dear Sir

I have a project to use the temperature sensing IC LMT70A
I would like to ask about Layout Temperature Sensing PAD I want to increase the temperature sensing PAD size
Which pin should I connect to the IC? Thank you

over 3 years ago

0 Josh Wyatt over 3 years ago

TI__Guru* 90906 points

Dear Lin -

Welcome to E2E!

Please follow the layout recommendations in the datasheet and see this application note, and apply recommendations given here, based on your application use case (seems as though the shared ground plane near a heat generating IC measurement would be best for you - sections 3.1.1 and 3.1.2) https://www.ti.com/lit/an/snoa967a/snoa967a.pdf

0 Lin Yueh Feng over 3 years ago in reply to Josh Wyatt

Prodigy 20 points

Dear Sir Josh

These data make me think that LMT70A is only suitable for temperature monitoring design of environmental air.
If I want to apply it to human body temperature sensing, is there a miniaturized recommended IC and design guideline for me?

Best Regards

Porter Lin