Recently purchased some AD559 CQ thermocouple chips from Ebay, these were sold at around 4x cheaper than the standard retail price! I don't honestly know what to make of these yet, one of the chips looked very suspect - so that will definitely will not be used. the picture shows the 8 purchased (back row) with the one at the front as the test control chip, which I used to make comparisons.
I think what I will do is put them into the boards and feed in some simulator temperatures and see how they compare to the real deal.
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