参数资料
型号: RXM-418-LR_
厂商: Linx Technologies Inc
文件页数: 17/40页
文件大小: 0K
描述: RECEIVER 418MHZ LR SERIES
标准包装: 25
系列: LR
频率: 418MHz
灵敏度: -112dBm
数据传输率 - 最大: 10 kbps
调制或协议: ASK,OOK
应用: ISM,车库门开启器,RKE
电流 - 接收: 5mA
数据接口: PCB,表面贴装
天线连接器: PCB,表面贴装
特点: 远程
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 70°C
封装/外壳: 16-SMD 模块
包装: 管件
其它名称: RXM-418-LR
RXM-418-LR-S
The Data Output
The CMOS-compatible data output is normally used to drive a digital de-
coder IC or a microprocessor that is performing the data decoding. In addi-
tion, the module can be connected to an RS-232 level converter chip, like
the MAX232, to a Linx USB module for interfacing to a PC, or to a standard
UART. Since a UART uses high marking to indicate the absence of data, a
designer using a UART may wish to insert a logic inverter between the data
output of the receiver and the UART.
The receiver’s output may appear to switch randomly in the absence of a
transmitter. This is a result of the receiver sensitivity being below the noise
floor of the board. This noise can be handled in software by implementing
a noise-tolerant protocol as described in Application Note AN-00160. If a
software solution is not appropriate, the squelch circuit in the figure below
can be used and the designer can make a compromise between noise
level and range.
VCC
VCC
R5
1M
R2
500k
R6
1M
VCC
RSSI
D1
C1
0.1 μ
R1
2M
2
3
-
+
U1
LMV393
1
R4
100k
6
5
-
+
U1
LMV393
7
R8
10k
Squelched Data
R3
5M
Figure 15: LR Receiver and LS Decoder
DATA
– 13 –
R7
2M
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