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ADF4106 flicker noise

Question asked by matt7192 on Mar 1, 2012
Latest reply on Apr 25, 2012 by Brigid.Duggan

Currently designing a multiloop synthesizer using three ADF4106 ICs.   I've modeled the various noise sources, except for the 1/f noise specd for the 4106.     Is this noise present on the feedback and reference counter inputs, since it appears to be independent of the divide ratios?.  If so, does this noise get reduced by the divider (20log(N)) for both the reference and feedback inputs or is this 1/f noise present on each divider stage?