FDA input ZIn
My question. In the datasheet fig 41 shows a recommended differential driver (FDA) interfacing to the ADC diff inputs. It looks like the Zin of the amplifier is appx 50ohms. I have a case where I could drive this FDA with another op amp but using a higher load than 50ohms would be easier. Most op amps cannot drive 50ohms directly so I would need to use a series 50ohm to limit current. Is it possible to reconfigure the FDA input a bit to make it maybe 200-500 ohms? Any circuit suggestions? Freq of operation is <= 1MHz.