I've got the most basic circuit to work with this chip, 4-20V supply and reading the voltage with uC or meter. Works fine. But none of the other ones I've tried will work. The useful one to me is the "-55 to 150 degrees C" but it seems to do nothing. I haven't tried using a proper negative supply rather than the 2 1N914 diodes as shown in the datasheet. The output I got from this is really unstable and a negative going voltage with increasing temperature. I used 2 1N4148 diodes, which I believe are about the same as the 1N914.
Any clues? The rest of the example circuits don't have a large enough range.
Any clues? The rest of the example circuits don't have a large enough range.
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