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Urgent: ADF4159 fast ramp generation, HOW FAST?

Question asked by Newpp on Jun 9, 2017
Latest reply on Jul 10, 2017 by dyoung1

All experts:


I have important questions to ask about ADF4159 frequency synthesizer.

How fast does a "fast ramp" generate from ADF4159?

What is the definition of fast and low speed FMCW ramp generation on the datasheet?


Take the ADF4159 EVM board for instance:

The reference clock: 100MHz

so fPFD = 100MHz

Time per step: CLK1 x CLK2 x (1/fPFD). Since CLK1 or CLK2 must be greater than 1, so I take CLK1 = 1, CLK2 = 2.

Timer = 2/(100Mhz) = 1/ (50Mhz), frequency = 50Mhz

Will this generate fastest ramp for this example???



Waiting for any good answers!!!