I want to measure the resistance of a Resistance Temperature Device(RTD) using the analog input of my arduino. Within the temperature range i want to measure the resistance varies from 1700 Ohms to 2300 Ohms. Aditionally i have to restrict the current to 200*10-6 A.
Ideally i would like to measure 0V if the resistance of the RTD is 1700 Ohms and 5V at 2300 Ohms.
Now my question:
What is the advantage of using a wheatstone bridge over a simple voltage divider?
It seems that there is no way of getting around the use of a OA? Is that right?