Hi Alon,
Do you need LVDS outputs? Typically ADCs benefit from the large swing and fast slew rate of an LVPECL driver.
This circuit note shows an ADF4351 connected to the ADCLK948 and the resulting performance.
http://www.analog.com/static/imported-files/circuit_notes/CN0294.pdf
There is a 1:6 LVPECL buffer similar to the ADCLK846 called the ADCLK946.
http://www.analog.com/static/imported-files/data_sheets/ADCLK946.pdf
If an LVDS buffer is required, you will have to be cautious to meet the input common mode and allowable swing. Since the LVDS buffers are on a 1.8V supply, they cannot handle as large of a swing as the LVPECL buffers.
Image may be NSFW.
Clik here to view.
Let me know if I can help further.
Regards,
Kyle
