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HMC439QS16GE and HMC3716LP4E input impedance

Question asked by anhchu on Sep 6, 2016
Latest reply on Sep 8, 2016 by anhchu

Hi, in the datasheets of HMC439QS16GE and HMC3716LP4E the input impedance of REF and VCO ports are 50 Ohm differential (page 7 of HMC3716LP4E datasheet), while on this page it is written as 100 Ohm. Which value is correct?

 

 The page is: FAQ: HMC Phase Frequency Detectors  (Impedance. The HMC439QS16GE provides a 50 ohm single ended impedance and improved RL at the REF and VCO ports while the HMC3716LP4E utilizes a 100Ω impedance that provides a 12dBc/hz improvement in phase noise. )

 

Thank you,

Anh

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