Best way to read multiple temperatures?

[retepsnikrep]

You could consider the Melexis MLX 90614 infra red sensor for the lower of your two ranges. -70 to +380c

I agree with the others who say you will really struggle with that accuracy over such a huge range.

Why such accuracy?

[jmgelba]

This is all automotive based for testing a piston in a prototype lean burn engine. All numbers are customer specs. Interestingly, the only thing on a engine that gets to 1800 is exhaust gases. I have no idea why they need - 30 to 1800 though.


24bit ADC as SPI slave and set to 8 bit. Output 4 words for each result?