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ADF4382 OUTPUT CIRCUITS

Thread Summary

The user inquires about converting the differential output (OUTP, OUTN) of the ADF4382 evaluation board to a single-ended output using a balun to reduce the number of SMA connectors. The final answer advises that Analog Devices does not recommend a specific balun but suggests terminating the unused differential output with 1uF capacitors to ground and powering down the output from software.
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Category: Hardware
Product Number: ADF4382

The evaluation board output of ADF4382 is OUTN and OUTP matched with a single-ended 50Ω line with 2 SMA connectors, respectively, and one of them connected with a 50Ω load when using a single-ended output, Now that a relatively compact circuit is needed, can OUTP OUTN be converted to a single-ended output via a BALUN? so that only one SMA output connector is needed, please recommend some BALUN. Also, what should be taken care of with PCB design for another output that is not intended to be used, directly dangling pins or via 100Ω matching to  ground?

  • Hi Eric,

    So we cannot really recommend a balun for you as it is not a product we offer.

    For an unused output, you should terminate the differential using 1uF each to ground, ensure you powerdown the output from software and no need for pull-up inductors on that output trace.

     Regards,

    Jude