Balun nRF52

[vidal]

Hello,

Can you share with us the balun of the nRF52 chipset or at least the ZLoad equivalent, that is R + jX value.

The Balun if the nRF52 is a 6-Element Balun or 4-Element Balun?.

Thanks in advance.

Jose.

[AmbystomaLabs]

There is no balun required for nRF52 SoC's. All the antenna connections are single ended.

Only nRF 51 chipsets have balanced antenna connections and require a balun.

[AmbystomaLabs]

You should contact Nordic directly if you are interested in the internal architecture of their SoC's. This site is really about implementation of their chips into products. The internal RF structure of the chips isn't useful for the hardware design.

With regard to external matching, again they are all single ended products. Most people follow the reference designs verbatim. Otherwise if you are doing a highly custom design it is always recommended to employ a VNA and standard matching techniques to come up with your own solution as your embedded RF environment will likely differ significantly from the reference design. Generally they don't even specify Zin for this reason. Your embedded Zin will differ from the reference design unless you follow the reference design absolutely. As such designing around a spec'd Zin will be largely futile.