ADM2481BRWZ-RL7

Overview

The ADM2481BRWZ-RL7 is a half-duplex, iCoupler isolated RS-485 transceiver manufactured by Analog Devices. It integrates a differential bus transceiver with a digital isolator in a single SOIC-16 package. The device supports data rates up to 500 kb/s and operates from a single 3 V or 5 V power supply. Key electrical parameters include a minimum common-mode transient immunity of 25 kV/µs and an operating temperature range of -40°C to +85°C. It features fail-safe circuitry and bus fault detection to ensure data integrity in noisy industrial environments.

Feature Summary

• Integrates galvanic isolation with RS-485 transceiver functionality using iCoupler technology
• Provides high-speed common-mode transient immunity for reliable communication in electrically noisy environments
• Includes built-in fail-safe circuitry and bus fault detection to maintain defined output states during idle or fault conditions

Applications

• Industrial automation control systems requiring isolated RS-485 communication
• Factory floor sensor networks and instrumentation interfaces
• Building automation and HVAC control units

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when ordering. Confirm the BRWZ variant corresponds to the commercial temperature grade and SOIC-16 package dimensions required for your PCB layout. Ensure compatibility with your system's voltage levels and isolation requirements before finalizing procurement.

Selection Notes

Select this component when bidirectional data transfer over balanced lines is required with integrated signal isolation. It is suitable for designs needing reduced component count by combining transceiver and isolator functions. Consider the 500 kb/s speed limit and half-duplex operation constraints relative to your network topology needs.

Part Context

This part belongs to the ADM2481 series of isolated RS-485 transceivers. It utilizes magnetic coupling technology to provide galvanic isolation without external transformers. The series is designed to replace traditional optocoupler-based solutions, offering higher reliability and smaller form factors for industrial interface applications.

Replacement Considerations

Direct substitutes within the same family include the ADM2481BRWZ (tape and reel) or ADM2481BRMZ variants. Verify pinout compatibility and isolation voltage ratings when cross-referencing with other isolated RS-485 devices from different manufacturers.