Datasheet > NRF402

NRF402

更新时间： 2024-11-04 23:54:27

品牌	Logo	应用领域
其他 - ETC		射频无线
页数	文件大小	规格书
10页	216K
描述
Wireless Component application notes/nRF402， RF and Antenna Layout

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APPLICATION NOTE

nRF402 RF and antenna layout

nAN400-06

General

Gerber files for RF layouts have been made for Nordic VLSI’s nRF402 Single Chip

433MHz RF Transmitter [1]. Three different loop antennas for 433MHz have also

been made available.

The Gerber files for each layout are compressed into the Zip archive format. The Zip

archive files includes a file named readme.wri that must be read before importing the

Gerber files into the PCB editor.

All described layouts should be fabricated on standard 1.6mm double-sided FR4

printed circuit board.

RF layout for nRF402

The RF layouts include all necessary circuitry to design the radio frequency part of a

short range communication system based on nRF402. The transmitter data and

control lines DIN, CS and PWR_UP are available at the perimeter of the RF layout

and should be connected to the digital part of a customer’s application. +3V and GND

are also available at the perimeter of the RF layout. The +3V for the RF part of the

application circuit should be filtered separately from the supply voltages of any digital

circuitry. Star routing is strictly recommended from the +3V supply source to the RF,

digital or other parts of the application circuit.

All RF layouts presented below are equal except for the antenna connection circuitry.

Solutions for differential connection to loop antenna and single ended connection to

50W antenna are presented.

2.1. Differential connection to loop antenna

Figure 1 shows the schematics for RF layout with differential connection to a loop

antenna. The PCB layout is shown in Figure 2. The loop antenna layouts described in

chapter 3 can easily be placed together with this RF layout. The connection points

numbered 1, 2 and 3 on the loop antenna layouts should be connected exactly to the

corresponding connection points numbered 1, 2 and 3 on the RF layout.

If the loop antenna of practical reasons has to be connected further away from the

nRF402, the connection has to be symmetrical and the length of the PCB tracks must

not exceed about 6cm. Since the loop antenna is a tuned antenna, the tuning of the

antenna has to be checked in this case.

The Gerber files Zip archive filename is PCB_nRF402_diff.zip.

Nordic VLSI ASA

Revision: 1.1

Vestre Rosten 81, N-7075 Tiller, Norway

Phone +47 72 89 89 00

Fax +47 72 89 89 89

February 2000

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与NRF402相关器件

型号	品牌	获取价格	描述	数据表
NRF403	ETC	获取价格	315/433 MHz Single Chip RF Transceiver
NRF403-IC	ETC	获取价格	315/433 MHz Single Chip RF Transceiver
NRF51	ETC	获取价格	Multi-protocol ANT System-on-Chip
NRF51422	ETC	获取价格	Multi-protocol ANT System-on-Chip
NRF51822	ETC	获取价格	Multi-protocol Bluetooth Low Energy and 2.4GHz proprietary system-on-chip
nRF51822-DK	ETC	获取价格	Multi-protocol Bluetooth Low Energy and 2.4GHz proprietary system-on-chip
NRF52810-QCAA-T	ETC	获取价格	NRF52810-QCAA QFN 32 PIN
NRF52810-QFAA-R	ETC	获取价格	NRF52810-QFAA QFN 48 PIN
NRF52810-QFAA-R7	ETC	获取价格	NRF52810-QFAA QFN 48 PIN
nRF6700	ETC	获取价格	Multi-protocol Bluetooth Low Energy and 2.4GHz proprietary system-on-chip

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