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Nordic Case Info

Case ID: 355365

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nRF54L family RF pin (ANT) output/input impedance

sebasr 4 months ago

I am curious about the RF pin impedance, as this parameter is not listed in the relevant specification for nRF54 SoC family (i.e. datasheet v1.0).

I wonder whether it is 50 Ohm allowing for direct antenna or amplifier connection.

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sebasr 4 months ago in reply to Asbjørn +1

In some cases, the PCB itself (material, stack-up) can impact the performance of the matching network. So it is reasonable to recalculate the circuitry. But to do so, the pin impedance is required.
Asbjørn 4 months ago in reply to sebasr +1

Hello Sebastian, yes, manufacturing and process can and will affect the performance and that is why we recommend to manually tune the circuit performance by changing component values on the specific…

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0 PaKa 4 months ago

You should use the recommended schematic and layout as the external components are a doing both impedance matching and adding a harmonics filter. Trying to bypass this will be a design that will most likely not be compliant with regulations anywhere in the world.
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0 PaKa 4 months ago

You should use the recommended schematic and layout as the external components are a doing both impedance matching and adding a harmonics filter. Trying to bypass this will be a design that will most likely not be compliant with regulations anywhere in the world.
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