ADUM1281WARZ-RL7

Overview

The ADUM1281WARZ-RL7 is a dual-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It operates within a supply voltage range of 2.7 V to 5.5 V and supports data rates up to 100 Mb/s. The device provides an isolation voltage of 3000 Vrms with a minimum common-mode transient immunity of 25 kV/µs. Key timing parameters include a propagation delay of 50 ns and a working supply current of 15 mA. It is qualified under AEC-Q100 standards for automotive applications and functions reliably across an operating temperature range of -40°C to +125°C.

Feature Summary

• Integrates high-speed CMOS circuitry with monolithic air-core transformer technology for robust signal transmission.
• Provides bidirectional signal isolation between two independent channels without requiring isolated power supplies.
• Features tight channel-to-channel matching to ensure precise timing synchronization in differential signaling applications.

Applications

• Automotive electronic control units (ECUs) requiring certified isolation
• Industrial communication interfaces such as RS-485 and CAN bus systems
• Medical equipment needing galvanic isolation for safety compliance

Procurement Notes

Verify the specific suffix 'W' indicates automotive grade qualification and 'ARZ' denotes the SOIC-8 package variant. Confirm that the '-RL7' suffix corresponds to reel packaging requirements. Ensure compatibility with AEC-Q100 standards if used in automotive environments. Cross-reference datasheet revisions to confirm material composition changes or manufacturing site transfers.

Selection Notes

Select this component when bidirectional isolation is required at speeds up to 100 Mb/s. The 3000 Vrms rating suits applications demanding higher isolation barriers than standard 2500 Vrms devices. Consider the 125°C maximum junction temperature for high-thermal environments. Evaluate power consumption against system constraints given the 15 mA supply current per side.

Part Context

This part belongs to the ADUM1281 series of dual-channel digital isolators. It shares the iCoupler architecture with other members like the ADUM1281BRZ but differs in automotive qualification and specific electrical tolerances. The series represents a transition from optical isolation to magnetic coupling for improved reliability and lower power consumption.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical parameter overlaps before considering alternative manufacturers or different series within the same vendor portfolio.