• What is the purpose of 0-ohm resistance on RF out lines of ADF4350?

    Oh the evaluation board of ADF4350 generator, each RF output line has a zero-ohm resistance marked as "L 0r".

    What is the purpose of this component? Should it have some specific properties?


  • ADF4350 no-OS driver example project

    Is an example c project available for the ADF4350 no-OS driver ?  Perhaps a test program written when the ADF4350.c driver was developed?

  • ADF4350 Not locking to required frequency

    HI Analog team,

    We are trying to generate 800 to 1312MHz LO signal from ADF4350 PLO. Step size shall be 10KHz.

    We are using 24.576MHz LVCMOS clock as a reference.

    Below are the schematic and register values used.

    With this settings, we are unable to…

  • ADF4350 lock detect (LD pin)

    We are experiencing a weird thing that the ADF4350 LD pin is always HIGH, or the locked LED is ON even if the output frequency is wrong. 


    For example, we have 10MHz REF IN and set ADF4350 to have 1600MHz output.

    However the output is 2200MHz instead and…

  • ADF4350/4351 punch/sawn LFCSP package

    There is a PCN from 2014 saying that ADF4350/4351 has switched to the sawn package.

    However, I'm seeing ADF4350 devices with date codes of 2018/2019 that are in the punched package.

    Are the punched package ADF4350s still being produced, or are these…

  • ADF4350 - 500MHz Output Waveform

    Hi. I am building a communication system and will be using ADF4350 as a local oscillator.
    I need 500 MHz or 600 MHz constant output from both RF outputs.

    What I've learnt from the related topics is that output waveform becomes more like a square wave rather…

  • ADF4350 S-parameters

    ADF4350 S-parameters by icollins

    Attached s-parameters for ADF4350 outputs.

    These were measured with RFoutA+/- output stage powered up at different power settings. RFoutA+ is connected to a network analyser while RFoutA- is connected to a 50 Ohm termination…

  • No output from ADF4350 when programmed correctly at certain frequencies


    I'm using the ADF4350 to generate the clock for the AD9914 and I would like the frequency to be either 2^31 Hz = 2147.483648 MHz or 3500 MHz which I generate from a 100 MHz reference. Using the evaluation software gives me the values I need to…

  • ADF4350 and ADF4351 evaluation board files

    ADF4350 and ADF4351 evaluation board files attached:

    • Gerber files
    • Schematic
    • Layout
    • Bill of Materials

    The schematic and layout were created in Mentor Graphics PADS. Get a free viewer here: http://www.pads.com/downloads/pads-pcb-viewer/