Hi
I am using STM32f103 and using its internal temperature sensor to measure ambient temperature. At room temperature(25°C), i get different readings from chip to chip ranging from 23 to 39°C.
The formula to calculate temperature is as follows: Temperature (in °C) = {(V25 - VSENSE) / Avg_Slope} + 25. where, V25 = VSENSE value for 25°C Avg_Slope = Average Slope for curve between Temperature vs. VSENSE (given in mV/°C or µV/°C).
Do i need to calibrate V25 for each chip?
Regards, Jasper