In my application I have a photo detector voltage that I need to sample. I need good resolution and low latency, but my input is basically DC and requires a high impedance load (no more than 10K). The AD9467 seems to be well matched for my application, but I need to design the interface circuit. Initially my thoughts are to have a unity gain OPAMP to provide the high impedance input, and use a differential buffer like the ADL5562 to DC-couple to the ADC. Any advice from folks who have done similar circuits would be greatly appreciated.
(I say the signal is basically DC, but I must measure very small fluctuations at about 200 MSPS).