Hi ,

How to define the input referred phase detector phase noise spec for HMC767LP6CE or any other HITTITE PLL.

Where do we get these number at 100HZ ,1KHz ,10KHz......offsets.

I know how to derive in-band phase noise floor spec with Ref frequency& division ration but I am not sure for the Hittite PLL's and for the HITTITE PLL software.

Regards,

Kishore.

I've attached a spreadsheet to calculate the input referred PFD noise from the PLL datasheet FOM specification. For any PLL (the HMC767 uses the HMC703 PLL) just enter the flicker and floor FOM numbers into the spreadsheet and set the comparison frequency to the same value as specified in the simulation.