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Measuring temperature with the AD8495

Question asked by DresoM on Jan 3, 2013
Latest reply on Jan 3, 2013 by harryh

Hello,

I am using the AD8495 for temperature measuring using K-type thermocouples.

 

In principle this IC works really well, the only problem I see is that the measured temperature is 2ºC lower that the real one for several minutes after powering the IC up. After this 5-10 minutes the temperature is stable and really accurate compared with other calibrated sensors.

 

I am using offset calibration by software and software linealization but this problem still appears only just after powering up the IC, after a while everything is Ok.

 

I have seen this in several different designs and pcbs, is there any way to avoid this?.

 

Thanks,

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