did a quick calculation and came to the conclusion that there will be no problem to put Aegis spy-1K on a 2200-ton hull. It easier to put it on a boat of 3000 tons for the boat will be stable enough for a Aegis radar, but if you do some tricks with the hull, you should be able to mount it on a lighter hull.
I'm going to say this to you as I have said it to others:
SPY-1 is not AEGIS. AN/SPY-1 is a
part of the AEGIS Combat System. The AEGIS Combat System consists of AN/SPY-1, the Mk-99 Fire Control System, and the command and control systems. Just the AEGIS Combat system itself ends up massing in the 5-800 ton range, and this doesn't account for both power and chilled water production that you will need to run the system. This is why the smallest full AEGIS ship designs (Fridtjof Nansen and DG/AEGIS) were still over 5000t displacement. I would even go so far as to say that the minimum hull size for an effective AEGIS ship would be in the 5000t range.