LVPECL swing converter

Is there a device which would accept differential LVPECL signal and convert it to differential signal of 6 v p-p or higher...

I am planning to adopt ADN2526 since it has open collector outputs...

My application requires such device with maximum propagation delay of 50ps.

The ADN2526 specs do not list propagation delay...

Please advice,

 

Sincerely,

 

Mathew Orman

  • 0
    •  Analog Employees 
    on Jan 25, 2016 11:17 PM over 4 years ago

    Hi Matthew,

    I apologize for the slow reply. Two devices come to mind: The ADCLK905, and any part in the AD9513/14/15 family.

    The ADLCK905 will give you 2x the swing of an LVPECL driver, and is very fast.

    The AD9513/14/15 have a CMOS mode where the differential pair can be out of phase. However, it's not as fast.

    Hope that helps.

    -Paul Kern

  • The ADCLK905 Paul suggested uses a state of the art SiGe process. It is only half as fast as what you want and the output swing is only about +-800mV.

    I doubt that you will find anything that can get you a propagation delay of 50ps and deliver 6Vpp.

    Just as a sanity check, if your rise time was 50ps on a 6V swing you would need to have 120mA of drive current per pF of load. And normally you want your rise time to be faster than your propagation delay. So this is REALLY hard.

    Klaus

  • Dear Mathew,

    ADN2526 takes a differential voltage modulation input in CML logic, converts this voltage signal to a modulated current sink signal with an internal 50 ohm termination. With a matched load (<50ohm), the max. Imodp/Imodn (compliance) voltage swing could be 2.2Vp-p. ADN2526 could support typ. 32pS, 20% to 80% edge time.

    ADN2526 might not be the perfect device to satisfy your applications. What is the 6Vp-p logic signal compliant to? LVPECL or LVCMOS?

    Best Regards,

    Dongfeng

  • 0
    •  Analog Employees 
    on Aug 2, 2018 3:17 PM over 2 years ago
    This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin