HMC545A CONTROL QUESTION

I want to use the HMC545A using a -7V/0V controls.  I can put inductors on the RF outputs to ground and also put blocking capacitors.   Will this work?
Or no inductor but capacitors on the RF, will this work?    Basically I only have a negative supply and ground in my circuit.  Disappointed

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  • +1
    •  Analog Employees 
    on Jul 29, 2020 6:39 PM

    Hi rocketrod,

    It is possible to level shift the HMC545A.

    Please use DC blocks on all RF ports (RFC, RF1, and RF2). Please connect the ground potential to -7V. This way you can use 0V and -7V for the logic controls, A and B. Please be extra careful to isolate the ground around the part on your board.

    Also, side note: The lower cutoff voltage on some of the our older-HMC parts are incorrectly stated. This is not a true-DC part. As we migrate datasheets from the Hittite format to ADI format, we are working on correcting this.

    Thanks,
    HK.

Reply
  • +1
    •  Analog Employees 
    on Jul 29, 2020 6:39 PM

    Hi rocketrod,

    It is possible to level shift the HMC545A.

    Please use DC blocks on all RF ports (RFC, RF1, and RF2). Please connect the ground potential to -7V. This way you can use 0V and -7V for the logic controls, A and B. Please be extra careful to isolate the ground around the part on your board.

    Also, side note: The lower cutoff voltage on some of the our older-HMC parts are incorrectly stated. This is not a true-DC part. As we migrate datasheets from the Hittite format to ADI format, we are working on correcting this.

    Thanks,
    HK.

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