• Power-up/Power-down Sequence VSS VDD Vctrl HMC649A Digital Phase Shifter


    What is the recommended Power-up/Power-down Sequence of VSS, VDD, and 6-bit +ve V-CTRL signals for HMC649A Digital Phase Shifter?

    Is the following sequencing correct ?

    Power-On: VSS, VDD, and Vctrl 

    Power-Off: Vctrl, VDD, and VSS 

    Could this device …

  • HMC649A switching time

    Hi Experts:

    Could you provide the switching time requirement for HMC649A, thanks!

  • HMC649A - connections

    Hi everyone,

    I recently acquired a phase shifter on a evaluation board (HMC649ALP6E).

    When I connect the only the power supply to the shifter, current is about 10 mA. If I connect RFin, the current goes higher, and current limiter activates (I set it…

  • RE: HMC649A

    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,
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  • RE: 36GHz RF oscillation signal source

    You need a PLL which drives a frequency doubler which drives an amplifier. Possible choices might be ADF4371 (PLL),  HMC1105 (frequency doubler) and HMC7229 (amplifier). These are not the only choices.


  • RE: Query

    This part is EAR99. The attached RFIC selection guide lists the ECCN codes for all of ADI's RF products.