Can I used this AD8044 op-amp in general video circuits like buffers, etc like the LM6172? Granted the Ad8044 runs on different power…
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The answer is…maybe.
The magic of the LM6172 is its insanely high slew rate of 3000V/uS.
The AD8044 is ‘only’ 170V/uS, which is still pretty fast.
It depends on the circuit itself…
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thanks. this is for experiments with CVBS so don’t care much for perfection.
also, i got it working! dumb mistake. i forgot to jump the ground from the bread board’s split power rail sections. so there was no true ground in my circuit…giving me super odd results.
Yeah, been there before. 
Ya I’ve had mixed results with the AD8034. Generally it seems to work as a drop in replacement but I’ve had a few circuits that just wouldn’t work until they were swapped for LM6172s. I’ve successfully built a VCO, summer, and a vga based rgb encoder/decoder. I was unsuccessful in using them in a vu007b build however. I haven’t figured out why but it didn’t seem like slew rate was the limiting factor. It’s considerably lower than that of the LM6172 but then again so is the ADA4851
Edit: just realized you were speaking of the ad8044. Whoops, I think some of what I said was still pertinent though