Muting RF output in ADF4360-1

I need disable/enable RF output of ADF4360-1 quickly, i.e. in less than 1 microsecond.

There is no single pin like "TXON" or "Output Enable". I don't see a way to access "MUTE" block either, which is driven by "Lock Detect" only (?).

My question is:

May I disable RF output by disconnecting RFoutA and RFoutB pins from DC supply?

In that case, all the tail current of the output differential pair transistors would flow probably through their B-E junctions; is it safe?

Any other suggestions how to mute RF output quickly?

Thanks in advance

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  • 0
    •  Analog Employees 
    on Oct 19, 2011 4:45 PM over 9 years ago

    Hello  ,

    Yes it is possible to disable the RFOUT by removing the power to the RFOUT pins, and this can be implemented using a standard transistor and a pulse generator, however, after it is re-applied the output frequency can show a pulling effect, and will need to re-lock.

    The CE pin is generally used to control RFOUT on/off time, but again, the device will need to re-lock.

    Regards,

    Brigid.

Reply
  • 0
    •  Analog Employees 
    on Oct 19, 2011 4:45 PM over 9 years ago

    Hello  ,

    Yes it is possible to disable the RFOUT by removing the power to the RFOUT pins, and this can be implemented using a standard transistor and a pulse generator, however, after it is re-applied the output frequency can show a pulling effect, and will need to re-lock.

    The CE pin is generally used to control RFOUT on/off time, but again, the device will need to re-lock.

    Regards,

    Brigid.

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