The RF and RA terminals are swapped in the Diagram on the front-page of the Datasheet (which also appears on their product page). I know this is trivial, but it's really confusing when someone is trying to follow the schematics with the aid of this diagram.
It reminds me of the first project I've got as a circuit designer 12 years ago, trying to build a lock-in amplifier with AD630 these days. It had really taken me a while to figure out that there is actually a typo in the diagram. It's really amusing thinking it still gets me 12 years later.