I want to take a signal ( 1 - 50 amps AC input) and run it through a current controlled voltage source and then through attenuation and then a precision rectifier. Do I need to have a level shifter incorporated, if I plan to convert this signal to 1-5 V DC before putting it into the ADC. My intention is to monitor current from a the utility line and convert it to a digital signal represented by 1-5V DC. Can you please provide me with some assistance with the below circuit? Here is what I have started. I think I have a good start but here is my lack of understanding. My development board (which contains the ADC) will only accept a 3.3V signal. I assume that is the signal that powers the development board and not the input. I have a lot of uncertainties and ask for help getting me on the right path. Thank you in advance.