I'm trying to make an instrumentation amplifier to measure a sine wave signal of 0 - 1Vpp (max) 50Hz that comes from a non-invasive current sensor (30A SCT-013-030). It gives 1Vpp at 30A current.
This is the circuit I made. The output goes to an MCU.
I would like to know if this circuit is okay for that kind of application.
Also, I found on the internet that in AC-coupled signals require a common-mode voltage applied to both inputs of the circuit. And that voltage should be the less of the maximum value of the signal which in my case would be 0.5V
Do I need that voltage in my case?
What does it do exactly?