ADM2481BRWZ

Overview

The ADM2481BRWZ is a half-duplex, galvanically isolated RS-485 transceiver from Analog Devices. It integrates a single driver and receiver with iCoupler magnetic coupling technology for bidirectional data communication. The device operates on 3 V or 5 V supplies with a maximum data rate of 500 kb/s. It features a 2500 Vrms isolation rating and supports a common-mode transient immunity of 25 kV/µs. The component is housed in a 16-pin SOIC package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates galvanic isolation using iCoupler magnetic coupling technology to eliminate the need for external isolation components.
• Provides high common-mode transient immunity of 25 kV/µs for reliable operation in electrically noisy industrial environments.
• Supports standard RS-485 half-duplex communication protocols with integrated driver and receiver functionality.

Applications

• Industrial process control systems requiring isolated field bus connections
• Factory automation and building control networks
• Medical equipment with strict safety isolation requirements

Procurement Notes

Verify the specific suffix (RL7) against the manufacturer's current datasheet to confirm packaging configuration and reel specifications. Ensure the procurement source provides valid RoHS compliance documentation. Cross-reference the part number with official Analog Devices distributors to confirm active status and availability constraints before finalizing orders.

Selection Notes

Select this component when designing RS-485 interfaces that require robust galvanic isolation without the size and power penalties of optocouplers. It is suitable for applications needing moderate data rates up to 500 kb/s. Consider the 16-pin SOIC footprint for PCB layout compatibility. Verify that the required isolation voltage meets the system's safety standards.

Part Context

This part belongs to the ADM2481 series of iCoupler digital isolators. It is distinct from higher-speed variants like the ADM2483 or ADM2485, which offer faster data rates. The series utilizes proprietary magnetic coupling technology to provide isolation barriers certified for creepage and clearance requirements.

Replacement Considerations

Direct replacements include other ADM2481 variants such as the ADM2481ARWZ for extended temperature ranges. For higher speed requirements, consider the ADM2483BRWZ or ADM2485BRWZ, though these differ in data rate capabilities. Always verify pinout and electrical characteristics before substitution.