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NRF52811-QCAA-R Datasheet(PDF) 434 Page - Nordic Semiconductor

Part # NRF52811-QCAA-R
Description  nRF52811
PDF  444 Pages
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Manufacturer  NORDIC [Nordic Semiconductor]
Direct Link  https://www.nordicsemi.com/
Logo NORDIC - Nordic Semiconductor

NRF52811-QCAA-R Datasheet(HTML) 434 Page - Nordic Semiconductor

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Hardware and layout
Fast switching digital signals should not be routed close to the crystal or the power supply lines. Capacitive
loading of fast switching digital output lines should be minimized in order to avoid radio interference.
7.3.9 PCB layout example
The PCB layout shown as the example is a reference layout for the QFN48 package with internal LDO
setup.
Important: Pay attention to how the capacitor C3 is grounded. It is not directly connected to the
ground plane, but grounded via VSS pin 31. This is done to create additional filtering of harmonic
components.
For all available reference layouts, see Reference layout nRF52 Series.
Figure 164: Top silk layer
Figure 165: Top layer
4454_140 v1.0
434



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