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GENERAL DESCRIPTION

The ADuM5401/ADuM5402/ADuM5403/ADuM54041 are quad-

channel digital isolators with isoPower?, an integrated, isolated dc-

to-dc converter. Based on the Analog Devices, Inc., iCoupler? technology, the dc-to-dc converter provides up to 500 mW of

regulated, isolated power at either 5.0 V or 3.3 V from a 5.0 V input supply, or at 3.3 V from a 3.3 V supply at the power levels shown in Table 1. These devices eliminate the need for a separate, isolated

dc-to-dc converter in low power, isolated designs. The iCoupler

chip scale transformer technology is used to isolate the logic

signals and for the power and feedback paths in the dc-to-dc

converter. The result is a small form factor, total isolation

solution.

The ADuM5401/ADuM5402/ADuM5403/ADuM5404 isolators

provide four independent isolation channels in a variety of

channel configurations and data rates (see the Ordering Guide for more information).

isoPower uses high frequency switching elements to transfer

power through its transformer. Special care must be taken

during printed circuit board (PCB) layout to meet emissions

standards. See the AN-0971 Application Note for board layout recommendations.

FEATURES

isoPower integrated, isolated dc-to-dc converter

Regulated 3.3 V or 5.0 V output

Up to 500 mW output power

Quad dc-to-25 Mbps (NRZ) signal isolation channels 16-lead SOIC package with 7.6 mm creepage High temperature operation: 105°C maximum

High common-mode transient immunity: >25 kV/μs

Safety and regulatory approvals

UL recognition

2500 V rms for 1 minute per UL 1577 CSA Component Acceptance Notice 5A

VDE certificate of conformity IEC 60747-5-2 (VDE 0884, Part 2)

VIORM = 560 V peak CQC certification per GB4943.1-2011

APPLICATIONS

RS-232/RS-422/RS-485 transceivers

Industrial field bus isolation

Power supply start-up bias and gate drives

Isolated sensor interfaces Industrial PLCs