HMC6832 SYSREF distribution

pavel_era on Aug 28, 2017

Hello, I would like to use HMC6832 for CLK distribution to ADCs (AD6676). I consider using another HMC6832 for SYSREF distribution as well but I am not sure about HMC minimum operation frequency - 10MHz... because SYSREF is one or several pulses signal only.

I would like to use same chip for both due to same parameters (Number of inputs and outputs, LVDS in/out, prop. delay...).

Do you think there could be a problem with using HMC for SYSREF?

Thanks,

Pavel

0 PMH

on Aug 28, 2017 5:43 PM
Hello,

Datasheet had recommended the HMC7044 since this device had the ability to generate a low phase noise clock source for the AD6676 (if phase noise is important to ones application) along with the SYSREF signal for up to 14 devices..

The HMC6832 also seems reasonable if you simply want to distribute between 4-8 SYSREF to multiple AD6676 devices.
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0 pavel_era on Aug 29, 2017 11:59 AM

Hi,

thanks.

Yes the recommendation says HMC7044 but I need more than 14 devices... I plan to use HMC7044 as "master" clock distribution and its outputs branched by HMC6832.
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