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參數(shù)資料
| 型號(hào)： | NRF902 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Single chip 868 MHz Transmitter |
| 中文描述： | 單芯片868兆赫發(fā)射機(jī) |
| 文件頁(yè)數(shù)： | 7/13頁(yè) |
| 文件大小： | 160K |
| 代理商： | NRF902 |
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PRELIMINARY PRODUCT SPECIFICATION
nRF902 Single chip 868 MHz Transmitter
Nordic VLSI ASA - Vestre Rosten 81, N-7075 Tiller, Norway - Phone +4772898900 - Fax +4772898989
Revision: 1.0
Page 7 of 13
April 2000
ASK modulation.
ASK modulation can be realised by using the REXT pin (see Figure 8). When R2 is
connected to VDD, the chip transmits a carrier. When the bias resistor is connected to
VSS then the internal output power amplifier is turned off. These two situations
represent logic ‘1’ and logic ‘0’ in an ASK system. When ASK modulation is used,
the FSK pin must be connected to VDD.
Matching Network/
Antenna
X1 13.567MHz
REXT
xtal
XO8
VDD
1
2
3
4
VDD
R2
R1
Clock
Output
FSK
VSS
8
ant1
Data
Input
ant2
VDD
7
6
5
C1
C2
VDD
nRF902
Figure 8. FSK transmitter in ASK Transmit mode
Antenna output
The “ant” output pins provide a balanced RF output to the antenna. The pins must
have a DC path to V
DD
, either via a RF choke or via the centre point in a loop antenna.
The load impedance seen between the ant1/ant2 outputs should be in the range 200-
700
. A load impedance of 400
is recommended if maximum output power
(10dBm) is needed. Lower load impedance (for instance 50
) can be obtained by
fitting a simple matching network or a RF transformer (balun). The 50
load can
also be connected directly between the ant1/ant2 pins, but this will result in higher
current consumption for a given output power to the antenna.
Note: Application notes of antenna layout solutions with matching networks will soon
be available on our website:
http://www.nvlsi.no.
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| NRF903 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Evaluation board |
| NRF903G | 制造商:Nordic Semiconductor 功能描述: |
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| nRF905 | 功能描述:射頻收發(fā)器 1.9-3.6V 433/868/ 915MHz TRNSCVR RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
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