Other Parts Discussed in Thread: LMT70, TMP117
The LMT70A seems a very useful device, I am evaluating it as an IceCell 0C reference point replacement for themocouples.
Using the values in : 8.6 Electrical Characteristics Temperature Lookup Table (LUT)
engineers may find the following 4 quartic piecewise-polynomial for converting voltage to temperature :
It consists of 4 quartic polynomials (5 values each), constrained to be continuous in value and gradient at each breakpoint.
The last 2 columns are the breakpoints (voltages) for which each quartic is valid.
At the quoted table temperature values the following graph shows the output temperature errors as a function of temperature :
So it seems to be better than 1 mK up to 100C.
Using the table voltage for 0C of 1097.987, we get :
Hope that this helps,
Dr. Beau Webber