This question generally applies to many situations, but in this case I am trying to figure out the best choice (no limit to the perfection).
I am stuck at both input coupling capacitor and output coupling capacitor.
Datasheet states that 0.1 uF capacitor is recommended. It shows non-polarized capacitor (but that does not 100% guarantee it may not be polarized). People just copy the reference circuit from the datasheet putting caps they have or are easily obtainable - X7R of 0.1 uF.
However reference design uses 1000 pF caps, with this unconfirmed brief info on the AD forum that AD must have used X7R caps. I am skeptical about it, and given tons of documents and opinions read last days I suspect that AD actually uses NP0/G0G 1000pF capacitors (no BOM for the device is available, and I suspect asking AD will not give any outcome). This nominal exists and is available in 0805 package. I did not find direct mentions that X7R are bad to use on the video path, but there're numerous mentions that it is not so good for audio paths, however minding voltage rating of cap (bigger is better).
Am I correct in my conclusions, and it is much better using NP0/C0G as input coupling caps? Or even electrolytics?
I bought EEU-EB1E221SB, which is 220uF/25V rating. Now I am not that sure that I have chosen correct cap. Forums and publications mention that lower ESR is better, but I can not find ESR informaton for EB family of caps. This information is only available for F* families. Looking through forums found out that F* must be "audio-grade" caps. Panasonic does not state the target usage for the families at all, it would be much convenient if they list typical applications for the families.
Do "audio-grade" electrolytic caps apply to the video transmission bandwidth and minimally impede video signal transmission? How to choose this cap type for the video application?
I want to hear your experiences, supported by the proven theory. Please refrain from statements that something will work just OK in generic cases. Please note I do not ask about nominals of the caps, I am asking about technologies of the caps.