**ADM2491EBRWZ: A Robust 75 kV Isolated RS-485/RS-422 Transceiver for Industrial Systems**

In the demanding world of industrial automation, process control, and building management, reliable communication over long distances is paramount. The **ADM2491EBRWZ** from Analog Devices stands out as a premier solution, engineered specifically to meet the rigorous challenges of these environments. This integrated transceiver combines a high-speed, robust data link with critical safety isolation, making it an indispensable component for modern industrial systems.

At its core, the ADM2491EBRWZ is a **complete galvanically isolated RS-485/RS-422 transceiver**. Its most defining feature is its **integrated isolation capability, rated at 75 kV/μs (common-mode transient immunity - CMTI)**. This exceptional level of noise immunity ensures data integrity even in the presence of severe electrical noise, large ground potential differences, and voltage transients commonly found on factory floors, where heavy machinery and motor drives can disrupt communication lines. The device incorporates Analog Devices' renowned **iCoupler® technology**, which provides both the signal isolation and the required isolated power on a single chip, eliminating the need for an external DC-DC converter and simplifying design.

Beyond its isolation prowess, the ADM2491EBRWZ delivers full RS-485 performance. It supports data rates up to **16 Mbps**, catering to high-speed network requirements. The transceiver is designed for **full-duplex communication** and features a proprietary slew-rate limited driver that minimizes electromagnetic interference (EMI) and reduces reflections caused by improperly terminated cables, ensuring a more robust and error-free data link.

For system safety and reliability, the device includes robust protection features. It offers **true fail-safe receiver inputs**, which guarantee a logic-high output if the inputs are open or shorted. Furthermore, the transceiver can withstand severe fault conditions, with **driver short-circuit protection** and **ESD protection of ±15 kV** on the bus pins (IEC 61000-4-2 Air-Gap Discharge), safeguarding the IC and the system behind it from electrostatic discharge events.

Housed in a compact, surface-mount 20-lead wide-body SOIC package, the ADM2491EBRWZ provides a space-efficient and highly reliable solution for applications such as industrial fieldbus networks, motor control systems, HVAC systems, and renewable energy inverters.

**ICGOO**DFIND: The ADM2491EBRWZ is a superior integrated solution that delivers **high-noise immunity**, **simplified design**, and **robust system protection**, making it an ideal choice for engineers developing reliable industrial communication networks.

**Keywords:** Galvanic Isolation, RS-485 Transceiver, Common-Mode Transient Immunity (CMTI), Industrial Communication, iCoupler Technology.