**ADM2687EBRIZ: A Comprehensive Guide to the 5 kV rms Signal and Power Isolated RS-485 Transceiver**

In the world of industrial automation, process control, and building automation, robust and reliable communication is paramount. Harsh electrical environments, characterized by high voltages, ground loops, and significant electrical noise, can easily disrupt data transmission and damage sensitive equipment. The **ADM2687EBRIZ from Analog Devices** stands as a critical solution to these challenges, serving as a fully integrated, **5 kV rms isolated RS-485 transceiver** that simplifies design and enhances system resilience.

This device is far more than a simple interface chip; it is a complete, self-contained isolation solution. Its core function is to create a galvanic isolation barrier between the logic-level circuits of a host controller (the "clean side") and the high-voltage, noisy RS-485 communication bus (the "field side"). The **ADM2687EBRIZ achieves this 5 kV rms isolation** for both the data signals and the power supply, eliminating the need for separate isolated DC-DC converters. This high level of isolation protects the host system from damaging voltage transients and prevents ground potential differences from corrupting data.

The architecture of the ADM2687EBRIZ is a marvel of integration. It incorporates a **RS-485 transceiver, Analog Devices' renowned iCoupler® technology for signal isolation, and an isoPower® integrated isolated DC-DC converter**. This single-chip approach drastically reduces board space, component count, and design complexity compared to discrete solutions. Designers no longer need to source and lay out multiple isolated power modules and optocouplers, accelerating time-to-market and improving system reliability.

Key features that define the ADM2687EBRIZ's performance include:

* **High-Speed Data Transfer:** It supports data rates up to **16 Mbps**, making it suitable for high-bandwidth industrial network applications.

* **Robust Bus Fault Protection:** The bus pins are protected from **faults up to ±15 kV ESD and overvoltage conditions up to ±25 V**, ensuring longevity in demanding environments.

* **Integrated Diagnostics:** Some versions offer advanced features like **open- and short-circuit receiver fail-safe** guarantees, ensuring a known logic state under fault conditions on the bus.

* **Compliance and Safety:** The device is certified according to key international safety standards, including **UL 1577, VDE V 0884-10, and CSA**, providing critical assurance for end-product certification.

Typical applications for the ADM2687EBRIZ are found anywhere robust, long-distance communication is needed. This includes **Programmable Logic Controllers (PLCs), industrial network equipment, motor control systems, and building environmental control systems**. Its ability to operate reliably in the presence of severe noise makes it an indispensable component for modern industrial IoT (IIoT) infrastructure.

**ICGOO**

**ICGOODFIND:** The ADM2687EBRIZ is a premier choice for engineers seeking a **highly integrated, robust, and reliable isolation solution** for RS-485 networks. By combining signal and power isolation in a single package with **exceptional 5 kV rms protection**, it simplifies design, reduces risk, and ensures data integrity in the most electrically challenging environments.

**Keywords:**

1. **Galvanic Isolation**

2. **RS-485 Transceiver**

3. **5 kV rms Isolation**

4. **Integrated DC-DC Converter**

5. **Industrial Communication**