AnsweredAssumed Answered

AD9739, two device synchronization and their clocking input

Question asked by usaghi on Jan 5, 2014
Latest reply on Jan 6, 2014 by danf

Hi,

 

We are currently designing using AD9518-1 and two AD9739 as multiple synchronization, interleaving ADCLK944 as clock buffer in order to compensate the width of output voltage swing from AD9518-1. Could you please provide advices or check whether the circuit scheme shown in below is good or not ?

 

planning revised design _block.bmp

 

Particular points we are concerning are,

a) Input for ADCLK944 is dc-coupled, however is it not need to be ac-coupled ?

b) In regard to line between ADCLK944 and AD9739 DACCLK, are these parameters adequate at output impedance 200 Ohm, differential line impedance 100 Ohm, and input impedance 100 Ohm ?

c) Please advise on layout of PCB pattern I attached.

 

Best Regards,

Outcomes