參數(shù)資料
型號: OL2381AHN
廠商: NXP Semiconductors N.V.
元件分類: 微波射頻器件
英文描述: Highly Integrated Single Chip Sub 1-GHz RF Transceiver
封裝: OL2381AHN<SOT617-3 (HVQFN32)|<<http://www.nxp.com/packages/SOT617-3.html<1<Always Pb-free,;
文件頁數(shù): 36/43頁
文件大?。?/td> 2978K
代理商: OL2381AHN
AN11017
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Application note
Rev. 2 — 10 May 2011
36 of 43
NXP Semiconductors
AN11017
Transceiver OL2381 using wireless M-BUS
Figure 39
shows a typical application schematic for the OL2381 operating in the 868 MHz
telemetry band.
Note the following:
At layout, there must be one whole ground plane on the underside.
A transitional ground plane must be below the RF signal path.
All components that have a ground pin, must have a via to the ground plane as short
as possible.
The resistors can be removed if the microcontroller always drives the inputs to a legal
state. Floating inputs can lead to increased current consumption.
The inductance and capacitance values at the RF_IN and RF_OUT path depend on
the parasitic of the layout. To ensure a good RF performance, verify these values after
board layout.
The capacitors connected to the V
CC
pins depend on the layout. The 100 pF capacitor
types must be as close as possible to the pin. If the pin has another 100 nF capacitor
nearby, some 100 nF capacitors can be removed.
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