• ADF4355, ADF4355-2, ADF4355-3, ADF4356, ADF5355, and ADF5356 evaluation board control software

    Installation process:

    1. Disconnect any evaluation board.
    2. Download and run the attached installer.
    3. Click Next/Continue/Finish when asked.
    4. Connect your evaluation board.
    5. Windows will detect the evaluation board and install the drivers.
    6. Run the…
  • ADF4355/ADF4355-2/ADF4355-3/ADF4356/ADF5355/ADF5356 Evaluation Software (Rev. 1.4.5) Source Code

    Source code of ADF4355/ADF4355-2/ADF4355-3/ADF4356/ADF5355/ADF5356 Evaluation Software is attached.


  • ADF4355-3 programming.

    Hello. Could someone answer the following about the ADF4355-3 synthesizer:

    1. If I want to use software power down mode after I programmed the IC, is there a register sequence to get back to power on mode or do I just flip the bit back? Is it possible…

  • ADF4355-3 VCO Calibration temperature range

    Hi sir,

    I don't find in ADF4355-3 data sheet the allowable temperature range for VCO not being re-calibrated.

    Is it -40°C to -105°C so 145°C?



  • RE: ADF4356 Vs ADF4355-3


    Unfortunately, VCO supply is 5 V for ADF4356.


  • ADF4355-3 Thermal Issue


    I have been having repeatable issue with the ADF4355-3 where heating up the IC will cause unstable RF output. What I'm seeing is the Lock Detect mux output is toggling between '1' and '0' repeatedly. When I update the registers with a new frequency…

  • ev-adf4355-3 power supplies 5V?

    The ADF4355-3 data sheet says all power supplies must be 3.3V

    I am looking at "EZ-ADF4355-3SD1Z User Guide". In the schematic and parts list it has the VCO etc supplied from a 5V regulator (reference VR2). Is this a mistake?

  • ADF4355-3 has spurious at 1.8kHz


    Our board output of ADF4355-3 has spurious at 1. 8kHz.  The spurious is constant in different output frequency, bleed current and CP current. 

    We attempt to replace DC-DC with external power supply,but the spurious still unchanded. 

    We have a few questions…

  • ADF4355-3 failure to lock and general questions

    I am trying to use ADF4355-3 as an upgrade for an existing product that successfully uses ADF4350.

    I do not have the evaluation board, but I am using ADIsimPLL to verify some register settings and my loop filter

    I am pretty sure I am communicating SPI…

  • ADF4355-3


    I had designed recently ADF4355-3 own board.In that I want to know

       1. whether Vvco and Vdd of ADF4355-3 can be given same 3.3v from one regulator or not?

       2. what happens if these  Pin23(Vref) and Pin24(Vbias) are connected to 3.3v?

       3.Does any thing…