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?.