Hello,
I have checked many topics, but I still have not found the right answer. I would like to measure the temperature using a PT1000 sensor (2-wire), using STM32 and its internal ADC. I can not afford to use MAX31865. Operating conditions of the system: Temperature measurement from 0-120 Celsius degrees. The measuring system (analog) will be exposed to temperature changes in the range of 0-70 Celsius degrees. the resolution that interests me is 0.5 degrees. I found some solutions (attachments):
first with current source with compensation, and second - Wheatstone bridge with Voltage reference (eg. LM4040).
Which solution will be better? Can you suggest an alternative, reliable layout?
I have checked many topics, but I still have not found the right answer. I would like to measure the temperature using a PT1000 sensor (2-wire), using STM32 and its internal ADC. I can not afford to use MAX31865. Operating conditions of the system: Temperature measurement from 0-120 Celsius degrees. The measuring system (analog) will be exposed to temperature changes in the range of 0-70 Celsius degrees. the resolution that interests me is 0.5 degrees. I found some solutions (attachments):
first with current source with compensation, and second - Wheatstone bridge with Voltage reference (eg. LM4040).
Which solution will be better? Can you suggest an alternative, reliable layout?
