Hi Kumar,
I am sorry about the short-hand. "BTW" means "by the way." I sometimes forget that I am not sending a text to my 16-year old daughter. Sorry about that!
I am wondering if it would make sense to run 4 AD7960 ADCs in parallel and sum their outputs together, in order to improve the resolution by 2 bits. When you add the outputs together, the signal will increase by 4x, while the noise will only increase by a factor of 2.
Best,
NevadaMark