can any one please tell me how to convert a 10 MHz analog sine wave to a digital square wave?... normal op-amps have range of few KHz as far as I know.

 

I think special comparator ICs can work at such a high frequency.

 

Hello,

What is the amplitude of the 10 Mhz sinus?
What amplitude of sqaure wave do you want?

Greetings,
Bertus

 

You can use a fast voltage comparator - http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1154,C1004,C1012,P1225