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ADT7310 air temperature

Question asked by xmas79 on Mar 11, 2015
Latest reply on Apr 11, 2015 by xmas79

Hi all,

I want to measure the air temperature with the ADT310. I have mounted three sensors in three different PCBs, and the digital value returned by the sensors is usually 3 or more celsius degrees off than the actual temperature. What's the typical usage of this sensor? Do I have to attach the top of the package to the surface I want to measure?

I read a post here that having a properly power regulators can affect measurements, but this seems not to be my case, since the sensor is powered by a 3.3V LDO (powered by a 5V switching power supply), and has a proper 0.1uF decoup cap near VCC and GND pins. Seems that I have to take into account thermal impedance of the package? Or any other suggestions?

 

Best regards,

xmas.

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