Amiga RGB to S Video & composite adapter

[Illuwatar]

I have used the AD724 in my MiniMig and got it working. You can see it in this schematics:

Schematics of a MiniMig

I'm not really familiar in the RGB-output from an Amiga, but the signal going to pin three (FIN) at the AD724, what is that? In my design, it is connected to a PAL (or NTSC) crystal and a parallell capacitor for picture stability adjustment.

I hope you get this working - the AD724 is a rather simple IC to work with.