The ADM2481BRWZ is a Half-duplex iCoupler Isolated RS-485 Transceiver designed for bidirectional data communication on balanced, multipoint bus transmission lines. Using iCoupler? technology, it combines a 3-channel isolator, a three-state differential line driver and a differential input receiver. The ADM2481 is slew-limited to reduce reflections with improperly terminated transmission lines. The controlled slew rate limits the data rate to 500kbps. Its driver has an active-high enable feature. The driver differential outputs and receiver differential inputs are connected internally to form a differential I/O port. When the driver is disabled or when VDD1/VDD2=0V, this imposes minimal loading on the bus. An active-high receiver disable feature, which causes the receiver output to enter a high impedance state, is provided as well. The receiver inputs have a true fail-safe feature that ensures a logic-high receiver output level when the inputs are open or shorted.
- RS-485 transceiver with electrical data isolation
- Complies with ANSI TIA/EIA-485-A and ISO 8482:1987 (E)
- 500kbps Data rate
- Slew rate-limited driver outputs
- Low power operation (2.5mA maximum)
- High common-mode transient immunity ( >25kV/μs)
- True fail-safe receiver inputs
- Chatter-free power-up/power-down protection
- 256 Nodes on bus
- Thermal shutdown protection
信号处理, 建筑自动化
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