ADUM7440CRQZ

Overview

The ADUM7440CRQZ is a four-channel digital isolator utilizing iCoupler magnetic coupling technology. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 25 Mbps with a propagation delay of 50 ns. The device provides an isolation rating of 1000 Vrms and exhibits common-mode transient immunity of 15 kV/µs. It is housed in a 16-lead QSOP package and functions bidirectionally across channels.

Feature Summary

• Integrates four independent digital isolation channels using on-chip transformer technology
• Provides bidirectional signal transmission capability for flexible circuit design
• Delivers high common-mode transient immunity to maintain signal integrity in noisy environments

Applications

• Industrial automation control systems requiring galvanic isolation
• Medical equipment interfaces demanding safety-rated isolation barriers
• Power electronics gate drive circuits for switching protection

Procurement Notes

Verify the specific suffix designation against official Analog Devices documentation to confirm package type and tape/reel configuration. Confirm RoHS compliance status through current manufacturer declarations. Ensure the component matches the required thermal performance specifications for the intended operating environment before procurement.

Selection Notes

Select this component when four isolated channels are required within a single package footprint. Consider the 1000 Vrms isolation rating for basic insulation requirements. Evaluate the 25 Mbps data rate limit against system timing constraints. Verify that the QSOP package dimensions fit the available PCB space.

Part Context

This part belongs to the ADuM744x family of digital isolators from Analog Devices. These devices replace traditional optocouplers by offering superior performance, smaller size, and greater reliability. The family utilizes proprietary iCoupler technology to integrate isolation barriers directly onto the silicon die.

Replacement Considerations

Official substitutes include the ADUM7440BRIZ and ADUM7440ARIZ variants. These alternatives share identical functional specifications but differ in manufacturing location or specific qualification standards. Verify pin compatibility and electrical parameters before substitution.