NRF402 Datasheet, PDF (11/16 Pages) List of Unclassifed Manufacturers – 433MHz Single Chip RF Transmitter

PRODUCT SPECIFICATION
nRF402 Single Chip RF Transmitter
VCO1/VCO2 pad and the centre of the inductor pad should be 5.4 mm, see Figure 12
(c) (layout, top view), for a 2 layer, 1.6 mm thick FR4 PCB.
PCB layout example
Figure 12 shows a PCB layout example for the application schematic in Figure 11.
A double-sided FR-4 board of 1.6mm thickness is used. This PCB has a continuous
ground plane on the bottom layer. Additionally, there are ground areas on the
component side of the board to ensure sufficient grounding of critical components. A
large number of via holes connect the top layer ground areas to the bottom layer
ground plane. There is no ground plane beneath the antenna.
For more layout information, please refer to application note nAN400-06,
“nRF402 RF and antenna layout”.
Nordic VLSI ASA
Revision: 2.1
Vestre Rosten 81, N-7075 Tiller, Norway -
Page 11 of 16
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February 2000