Driving ADL5350 from ADF4360-7

The ADL5350 needs about 4dBm LO drive. In my case the LO is around 1700 MHz. Do I need a balun and a LO buffer to use the ADF4360-7 as the LO source? Or perhaps some smart trick allows me to connect it differently as LO harmonics is not important as the mixer is already square wave? My goal would be to save the power used by a LO buffer.

  • 0
    •  Analog Employees 
    on Oct 9, 2017 9:15 PM over 3 years ago

    Hi,

    It seems your frequency plan is similar to the Board B on our evaluation board. The board B configuration is designed for the frequency below.

    You may need to tweak the matching network if frequency plan is different from above.

    The nominal LO power needed for this frequency is 6dBm. The performance will be degraded if power is not high enough, e.g. conversion loss as below

    If you are using ADF4360, I believe a buffer amplifier is needed.

    Regards.