Clock PLL - ADF4001 anyone?

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andrei

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Joined 2002
sfu.ca/~frolov
#1
Hi,

In my next DAC project, I am going to try reclocking from local VCXO, and so I am evaluating my options in analog PLL chips. Has anyone around here used ADF4001? Seems like a nice enough chip on paper, but the bother of setting up MCU just for it... Or maybe the old MC145151? THAT does not need an MCU 🙂.
 
#2
andrei said:
Hi,

In my next DAC project, I am going to try reclocking from local VCXO, and so I am evaluating my options in analog PLL chips. Has anyone around here used ADF4001? Seems like a nice enough chip on paper, but the bother of setting up MCU just for it... Or maybe the old MC145151? THAT does not need an MCU 🙂.
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Hi

We did it the straightforward way

http://members.chello.nl/~m.heijligers/DAChtml/dactop.htm

I do not know what is inside these chips so no clue on their performance

best regards
 
#3
I know about your design. In fact, I have been tempted to build it, but where do you get the now obsolete chips?

But now that you bring it up, I have a question for you. Why did you go for discrete logic instead of integrated phase detector? 7 logic ICs take up a lot of PCB space...
 
#4
andrei said:
I know about your design. In fact, I have been tempted to build it, but where do you get the now obsolete chips?

But now that you bring it up, I have a question for you. Why did you go for discrete logic instead of integrated phase detector? 7 logic ICs take up a lot of PCB space...
Click to expand...

Hi

If you refer to NPC5842: I supply a plugin that emmulates its' function, it is based upon the NPC5847

Discrete phase comperator: Because it is pure, and all other chips we considered are not, or lack linearity.

Board space was a design issue, but low jitter was one as well !

regards
 
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