I used a TMP36 as temperature sensor. The chip was mounted on an aluminium block using glue. However I found it is very easily to be drifted by something, such as when I put my fingers closed to the wires (about 2 inches), and the value is different when the case is open or closed.
Bypass caps, bead, R/C filter on Vcc, have little improvements. adding a 1kohm resistor between the output and ground stabilizes the output, but according to the datasheet the 1kohm load is too much for the device.
I tested the AD22100 and it has no such problem.
Hi, apologies for delay in getting back. Can you provide more details such as how different are the readings when your fingers approach the wires and value of RC filter components used. A schematic would be very useful.