Other Parts Discussed in Thread: TINA-TI
Is there a figure available for the open-loop output impedance of the OPA-x991 at DC? The datasheet has a figure at 1 MHz and a chart that goes from 100 - 40 MHz. The chart for another part, OPA-192, goes down to DC and the result is different than the 1 MHz figure, so I would not assume to extend the line on the OPA-x991 chart. My design goal is to buffer a DC voltage divider reference at < 0.1 ohm source resistance.