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
●ESD sensitive device, take proper precaution while handling the device.
