I am currently using a differential amplifier, but the moment I connect the input to the differential amplifier, the input voltage decreases. Below is the diagram.
The input comes from a RMS IC module that has an output impedance of 12.5kohm. The RMS IC module outputs max voltage of 900mV. Per everyone recommendation, I searched for instrumentation amplifier but unfortunately, I cannot seem to find an instrumentation amplifier as it looks like it has a minimum voltage requirement (looking at the diamond plot.)
- I am using a single 9V power supply
- The input voltage varies from 100mV to 900mV.
Based on this, I cannot seem to find an instrumentation amplifier but it looks like it work well with a dual supply. Can anyone recommend me an instrumentation amplifier that works well with an input voltage range of 100mV to 900mV with a single 9V power supply. I hope to hear your response.
I have thought of using a voltage follower but I would like to keep it down to a single op-amp if possible. I hope to hear your opinion.