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CC2640R2F: Inductor Orientation at Single Ended RF External Bias?

Markel Robregado
Guru 86745 points
Part Number: CC2640R2F

Hi,

   Would there be any bad effects in RF if for example the inductors have been placed by PCB manufacturer with wrong orientation maybe reversed? I read the Murata post below and different inductor orientations outputs different inductance value.

https://www.murata.com/en-sg/products/emiconfun/inductor/2012/05/14/en-20120514-p1

-kel

  • 0
    TI__Guru**** 317180 points
    I assume that you mean position 2 instead of position 1 with reference to the article? If that is the case I would assume that the impact of the wrong orientation is less than the component tolerance and hence you should not be able to see any impact.

    If they have just mounted one the wrong way and this is in the balun, the balun could be slightly more not balanced since RF_P will see a slightly different value than RF_N.

    We have not tested with both orientations.
  • 0 in reply to TER
    Guru 86745 points

    Hi TER,

    This is the Single Ended RF External Bias Configuration. As you can see 2 inductors indicates Pin 1 and Pin 2. What If the PCB Manufacturer mounted the inductors reversed, what is the impact in RF?

    -kel

  • 0 in reply to Markel Robregado
    TI__Guru**** 317180 points
    As said I would assume that the impact is minimal but since we haven't measured this we can't know for sure.

    Have you done any measurements on this?
  • 0 in reply to TER
    Guru 86745 points
    No, we just finished PCB design and we just worried if that might happen during PCB Manufacturing. Anyway, thanks I will mark this post as "Answered".

    -kel