ADM2491EBRWZ-REEL7

Overview

The ADM2491EBRWZ-REEL7 is a high-speed, ESD-protected, half- or full-duplex iCoupler isolated RS-485 transceiver manufactured by Analog Devices Inc. It integrates magnetic coupling technology to provide galvanic isolation between the logic and bus sides. The device supports data rates up to 16 Mbps with a propagation delay of 45 ns. It features ±8 kV ESD protection on the RS-485 input/output pins and offers a common-mode transient immunity of 25 kV/µs. Operating from a single power supply between 3 V and 5.5 V, it draws typical supply currents of 6 mA for the driver side and 50 mA for the receiver side. The component is housed in a 16-lead SOIC package.

Feature Summary

• Integrates iCoupler magnetic coupling technology for galvanic isolation without external transformers
• Provides configurable half-duplex or full-duplex operation for RS-485 communication
• Features robust ±8 kV ESD protection on RS-485 I/O pins for harsh environments
• Delivers high common-mode transient immunity of 25 kV/µs

Applications

• Industrial automation control systems requiring isolated RS-485 communication
• Building automation networks utilizing RS-485 protocols
• Process control instrumentation with ground potential differences
• Energy metering devices needing galvanic isolation

Procurement Notes

Verify the specific suffix REEL7 confirms tape-and-reel packaging when ordering. Confirm the voltage grade (E) and temperature range match design requirements. Check current availability status as distribution may vary. Ensure the 16-SOIC footprint aligns with PCB layout constraints. Validate RoHS compliance documentation for regulatory adherence.

Selection Notes

Select this component when designing RS-485 interfaces requiring integrated isolation to break ground loops. It is suitable for applications demanding high ESD resilience and fast data transmission up to 16 Mbps. Consider the dual-supply architecture if separate logic and bus power domains are necessary. Evaluate the 16-SOIC package size against available board space. Compare CMTI specifications against noise levels in the target environment.

Part Context

This part belongs to the ADM2491E series of isolated transceivers from Analog Devices. It utilizes iCoupler technology, which embeds microtransformers within the semiconductor die. This approach reduces the need for bulky external isolation components. The series is designed for reliable communication in electrically noisy industrial settings.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.