ADM2483参考设计电路|差分总线收发器应用电路

ADM2483差分总线收发器是一款集成式电流隔离器件，适用于多点总线传输线路的双向数据通信。此篇主要介绍了ADM2483特性、应用范围、参考设计电路以及电路分析，帮助大家缩短设计时间。

ADM2483特性：集成电气数据隔离的RS-485收发器；高共模瞬变抗扰度：>25kV/μs；热关断保护；低功耗工作：2.5mA最大值

ADM2483典型应用范围：隔离接口；楼宇控制网络；多点数据传输系统

ADM2483参考设计应用电路：

图1ADM2483内部结构图

TheADM2483 is slew-limited to reduce reflections with improperly terminated transmission lines. The controlled slew rate limits the data rate to 500 kbps. The device’s input impedance is 96 kΩ, allowing up to 256 transceivers on the bus. Its driver has an active-high enable feature.

图2ADM2483参考设计图

TheADM2483 requires isolated power capable of 5 V at 100 mA to be supplied between the VDD2 and GND2 pins. If no suitable integrated power supply is available, a discrete circuit,such as the one in Figure 30, can be used. A center-tapped transformer provides electrical isolation.

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