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| 型号： | TRM-433-LT |
| 厂商： | Linx Technologies Inc |
| 文件页数： | 17/44页 |
| 文件大小： | 0K |
| 描述： | TRANSCEIVER RF 433MHZ LT SERIES |
| 产品目录绘图： | TRM-433-LT Top TRM-433-LT Side |
| 特色产品： | LT Series Long-Range RF Transceiver Modules |
| 标准包装： | 34 |
| 系列： | LT |
| 频率： | 433MHz |
| 数据传输率 - 最大： | 10kbps |
| 调制或协议： | AM，OOK |
| 应用： | 双向传呼，ISM，机器人，遥测 |
| 功率 - 输出： | 10dBm |
| 灵敏度： | -112dBm |
| 电源电压： | 2.1 V ~ 3.6 V |
| 电流 - 接收： | 6.1mA |
| 电流 - 传输： | 12mA |
| 数据接口： | PCB，表面贴装 |
| 天线连接器： | PCB，表面贴装 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 表面安装 |
| 包装： | 管件 |
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and spurious emissions. The transmitter is comprised of a VCO locked
by the PLL. The output of the VCO is amplified and buffered by a power
amplifier. The amplifier is switched by the incoming data to produce a
modulated carrier. The internal digital logic controls a switch that connects
the LNA input to ground when in transmit mode, preventing the transmitter
from de-sensitizing the receiver. The carrier is filtered to attenuate
harmonics, and then output on the 50-ohm RF port.
The transceiver’s topology makes the module highly immune to frequency
pulling, mismatch, temperature, and other negative effects common to
some low-cost architectures. The LT Series design and component
quality enable it to outperform many far more expensive transceiver
products, making it well-suited for a wide range of consumer and industrial
applications.
Power Supply Requirements
The module does not have an internal
voltage regulator; therefore, it requires a
clean, well-regulated power source. While it
is preferable to power the unit from a battery,
it can also be operated from a power supply
as long as noise is less than 20mV. Power
supply noise can significantly affect the
receiver sensitivity; therefore, providing clean
power to the module should be a design
Figure 22: Supply Filter
priority. A 10-ohm resistor in series with the
supply followed by a 10μF tantalum capacitor from V CC to ground will help
in cases where the quality of the supply power is poor. Note that the values
may need to be adjusted depending on the noise present on the supply
line.
– 13 –
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