ADUM1280ARZ-RL7

Overview

The ADUM1280ARZ-RL7 is a dual-channel digital isolator from Analog Devices, utilizing magnetic coupling technology for signal transmission. It operates within a supply voltage range of 3.135 V to 5.5 V and supports data rates up to 1 Mb/s. The device provides an insulation voltage of 3000 Vrms and exhibits a common mode transient immunity of 25 kV/µs. Key electrical parameters include a propagation delay of 23 ns, with rise and fall times of 3 ns each. It functions reliably across an extended temperature range from -40°C to +125°C. Packaged in an SOIC-8 surface-mount format, it draws operating currents of 1.1 mA and 2.7 mA per channel.

Feature Summary

• Provides galvanic isolation between circuits using on-chip transformer technology
• Supports unidirectional signal transmission for digital logic interfaces
• Ensures high noise immunity against fast-rising voltage transients

Applications

• Industrial communication bus isolation
• Medical equipment signal isolation
• Power management system monitoring

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging when sourcing. Confirm the manufacturer part number matches exactly to ensure correct die revision and performance characteristics. Check current availability status as distribution may vary by region. Ensure compatibility with existing PCB footprint designs requiring SOIC-8 packages.

Selection Notes

Select this component for applications requiring bidirectional or unidirectional digital isolation with moderate data rates. Consider the 3000 Vrms isolation rating for safety-critical environments. Evaluate power consumption requirements against the specified operating currents. Verify that the SOIC-8 package dimensions fit the target board layout constraints.

Part Context

This part belongs to the ADuM128x family of digital isolators designed for robust signal integrity. It replaces legacy optocoupler solutions by offering smaller form factors and lower power consumption. The series is engineered for high reliability in harsh electromagnetic environments typical of industrial and automotive sectors.

Replacement Considerations

Direct substitutes include other ADuM128x variants such as ADUM1281, ADUM1285, or ADUM1286, depending on required channel directionality and speed specifications. Cross-reference datasheets to confirm pinout compatibility and electrical parameter alignment before substitution.