Do you have information on the phase noise of the dividers used in your current frequency synthesiser devices ? You publish total device phase noise performance, which is usually adequate, but I want to use the ADF4107 as a programmable divider, and I'm not able to model the system properly...
We have not evaluated the counters and charge pump separately. However, we do know that the CP is not a significant contributor to phase noise. We have deduced this by virtue of the fact that changing the CP current from 5mA to 625µA makes no difference to the overall phase noise. In theory, the best phase noise is achieved with max CP current.
Therefore, it is safe to assume that the PN achieved when used as a counter will be much the same as the phase noise quoted in the data sheet.