... you can measure any temperature with a 0-5 Volts signal, when you select proper resistor bridges to 'fit' the signal in this range.
I've done this for temps from 0 to 800 degC with a PT100 as nearly linear sensor (different calculation for 0-300 and 300-800 degC) and an ADuC847 µC.
This µC has a 24 Bit ADC, but only up to 22 Bit really usefull - so the resolution was 'only' 0.0002 degC ;)
I've done this for temps from 0 to 800 degC with a PT100 as nearly linear sensor (different calculation for 0-300 and 300-800 degC) and an ADuC847 µC.
This µC has a 24 Bit ADC, but only up to 22 Bit really usefull - so the resolution was 'only' 0.0002 degC ;)