ADM2483BRW

Overview

The ADM2483BRW is a half-duplex, galvanically isolated RS-485 transceiver utilizing iCoupler technology. It integrates a three-channel isolator, differential line driver, and receiver in a single package. The device supports data rates up to 500 kbps with a controlled slew rate to minimize reflections. It operates on a 3 V or 5 V logic supply and a 5 V bus supply. Key electrical parameters include a 2500 Vrms isolation voltage, 96 kΩ input impedance supporting up to 256 nodes, and a maximum propagation delay of 600 ns. It functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a three-channel digital isolator with the RS-485 transceiver for compact design
• Provides true fail-safe receiver operation ensuring known output states during idle conditions
• Includes current limiting and thermal shutdown protection against short circuits and contention

Applications

• Industrial automation control systems requiring galvanic isolation
• Building automation networks using balanced multipoint bus lines
• Process control instrumentation interfaces

Procurement Notes

Verify the specific suffix (e.g., BRW vs BRWZ) against the manufacturer's official datasheet to confirm package type and lead-free compliance status. Ensure the selected variant matches the required operating temperature range and supply voltage specifications for the target application environment before finalizing procurement.

Selection Notes

Select this component when high-density integration of isolation and RS-485 functionality is required. It is suitable for applications needing robust noise immunity and simplified board layout due to the integrated three-channel isolator. Consider the 500 kbps speed limit and 5 V bus supply requirement when designing the system architecture.

Part Context

This part belongs to Analog Devices' iCoupler family of isolated interface products. It combines magnetic coupling technology with standard RS-485 transceiver functions. The series is designed to replace traditional optocoupler-based solutions, offering improved reliability and smaller form factors for industrial communication standards.

Replacement Considerations

Check for direct pin-compatible alternatives within the ADM248x series. Verify that any substitute maintains the same 500 kbps data rate, 2500 Vrms isolation rating, and 96 kΩ input impedance to ensure bus compatibility.