10 mV/°C scale — the calibration constant
The output scales at 10 mV/°C, so 25°C reads 250 mV on the ADC input. The ±1.5°C accuracy at 25°C sets the system error floor — the rest comes from the ADC reference drift and the PCB trace resistance.
TO-46 metal can — hermetic seal matters
The TO-206AB / TO-46-3 metal can package is the differentiator here. Unlike the plastic TO-92 LM35, the hermetic TO-46 keeps moisture out, which matters in condensing environments, vacuum chambers, or any board that sees conformal-coat solvents.
