LM94021: NEEDED SOLUTION FOR LM94021

Shri Ramya

Part Number: LM94021

HELLO .

I ARE USING THE TEMPERATURE SENSOR LM94021 FOR MY PROJECT. I WANTED TO KNOW HOW MUCH PORTION OF THE SENSOR SHOULD BE EXPOSED TO ATMOSPHERE WHILE DESIGNING THE PCB IF THE TEMPERATURE SENSOR IS ENCLOSED IN IT. PLEASE REPLY ASAP.

THANK YOU

over 5 years ago

0 David Vaseliou over 5 years ago

TI__Expert 6820 points

Hi Shri,

This is dependent on your application and the temperature you are trying to measure. For example, designing a PCB to measure ambient temperature would be different then one for measuring board temperature. The better the thermal path to the LM94021 from the source you would like to measure the better the measurements will be. For more information on designing your PCB I have referenced a few app notes on PCB design for different applications.

https://www.ti.com/lit/an/snoaa01/snoaa01.pdf

https://www.ti.com/lit/an/snoa966b/snoa966b.pdf

https://www.ti.com/lit/an/snoaa26/snoaa26.pdf

http://www.ti.com/lit/an/snoa967a/snoa967a.pdf

Thanks,

0 Shri Ramya over 5 years ago in reply to David Vaseliou

Prodigy 20 points

Hi David,

Thank you for the answer. The PCB which is being designed is used to measure the atmospheric temperature. So I wanted to know how much exposure should be given to the temperature sensor which is being used i.e. LM94021

0 David Vaseliou over 5 years ago in reply to Shri Ramya

TI__Expert 6820 points

Hi Shri,

Please see the above apps notes for measuring ambient temperature. The more exposed the temperature sensor is the better the thermal path will be to the device

Thanks,

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LM94021: NEEDED SOLUTION FOR LM94021