I'm looking to control four HMC347 die devices using the same driver, could you please tell me the resistance and capacitance for the A / B control inputs? Also would you have switch time numbers above 90%RF? Thanks.

Best Regards.

  • 0
    •  Analog Employees 
    on Dec 16, 2014 1:27 AM

    Hi Bill,

    Below is the interface circuit on Ctl A and Ctl B inputs of the HMC347.


    On each of the control paths, CTRLA and CTRL B, the series R is 1250-ohm and the C is the internal FET’s channel capacitance, 1.5pF. R is connected to the Vctl input pin.

    Attached is the typical RF settling time, time measured from 50% of triggered Vctl to >90% of RF out, of the HMC347. The performance was evaluated on HMC347 in LP3 package, but should closely represent the performances on the HMC347 in die and other package forms. The data report also includes our recommendation on forward biasing/gate lag solution to improve the RF settling time of the HMC347.

    Please contact me if you have other questions.

    Best Regards,



  • 0
    •  Analog Employees 
    on Aug 2, 2018 2:51 PM
    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
  • I'm interested in the referenced data report, but I do not see an attachment? Is there a link to access it that is still valid? 

    Thank you