Other Parts Discussed in Thread: REF2041,
We are measuring an induced AC voltage (50/60Hz) that can range from 100mV PP to 150V. Isolation would be nice but that can come later. We were looking at a peak detector with AC coupling into a 100:1 voltage divider and then to the peak detector. Similar to this:
Thanks Kai for the head start.
R2 provides feedback to the buffered output that includes the diode forward drops. What determines its optimum value?
ADC will be the ADS1220. The opamp power will be rail split for a single 5V supply.