ADUM4471ARIZ

Overview

The ADUM4471ARIZ is a four-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It integrates an isolated DC/DC converter to provide power across the isolation barrier. The device operates with supply voltages between 3 V and 5.5 V on both sides. Key electrical specifications include a data rate of 25 Mb/s, a maximum propagation delay of 55 ns, and an insulation voltage rating of 5000 Vrms. It features a common-mode transient immunity of 25 kV/µs and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Integrates an isolated DC/DC converter for simultaneous signal and power transmission across the isolation barrier
• Employs iCoupler magnetic coupling technology for high reliability and small form factor
• Provides unidirectional signal isolation with four independent channels
• Offers high common-mode transient immunity for robust noise rejection

Applications

• Pulse Width Modulation (PWM) control circuits
• Transistor driver interfaces
• Industrial automation systems requiring galvanic isolation
• Power supply feedback loops

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and moisture sensitivity level prior to soldering. Check for specific ordering suffixes that may indicate packaging variations. Ensure storage conditions meet humidity requirements to prevent package damage before reflow processes.

Selection Notes

Select this component when bidirectional communication is not required, as it supports only unidirectional data flow. Consider the integrated power supply capability if secondary side isolation power generation is needed. Evaluate the SOIC-20 package dimensions against available PCB real estate. Compare propagation delay characteristics against system timing constraints.

Part Context

This part belongs to the ADuM447x family of digital isolators designed for applications demanding high isolation voltage and integrated power conversion. It complements other interface ICs by combining signal integrity with power delivery in a single package. The series targets industrial and automotive environments where space savings and reliability are critical design factors.

Replacement Considerations

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