I need a stable 2.5volt reference voltage. I figured since I already have a stable 5 volt source, that two same value resistors would make a quick and cheap voltage divider. I have two 25.5kΩ 1% resistors wired on a bread board in series. A quick check with a calculator and ohms law indicated that the current draw of the two resistors is approximately 0.1mA. which is very good since I'm intending it to run on battery power. I intend to use the 2.5 volts in a voltage comparator circuit with a MOSFET Op Amp. So it was my thought that the load of the voltage divider output(2.5volts) be more or less negligible. however when checking the voltage with my digital multimeter, the voltage across each resistor is actually 2.46 volts, which is close enough for my application. what has me confused is it reads 5 volts across both.
I'm having a hard time figuring out why the two voltages across the resistors don't add up to 5 volts. Is this normal behavior? are my resistor values too high?
attached is a picture of my set up
I'm having a hard time figuring out why the two voltages across the resistors don't add up to 5 volts. Is this normal behavior? are my resistor values too high?
attached is a picture of my set up