AD2S90 +AD2S99

Hello.

Is it possible to use one generator AD2S99 with buffer and four AD2S90 IC's?

What to do with pins of AD2S99 SIN COS SYNREF? 

Maybe there are some detailed shematics like in figure 16 of datasheet AD2S90 http://www.analog.com/media/en/technical-documentation/data-sheets/AD2S90.pdf  

What accuracy should we expect?

Velocity not interested, only position.