ADUM3470WCRSZ

Overview

The ADUM3470WCRSZ is a four-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It integrates a PWM controller and transformer driver to provide an isolated DC/DC power supply, eliminating the need for separate isolation converters in 2W designs. The device supports bidirectional signal transmission at data rates up to 25 Mb/s with an insulation voltage of 2500 Vrms. It operates within a temperature range of -40°C to +105°C and features AEC-Q100 qualification. Packaged in a 20-lead SSOP, it includes protection mechanisms such as soft start, cycle-by-cycle overcurrent protection, and thermal shutdown.

Feature Summary

• Integrates PWM controller and transformer driver for isolated power generation
• Provides bidirectional signal isolation across four channels
• Includes built-in protection against overcurrent and thermal events

Applications

• Isolated DC/DC converter bias supplies
• Industrial fieldbus isolation
• Gate drive isolation for power switches
• RS-232/RS-422/RS-485 transceiver isolation

Procurement Notes

Verify the specific suffix 'WCRSZ' against official documentation to confirm package type and reel specifications. Ensure compatibility with AEC-Q100 automotive requirements if applicable. Cross-reference part numbers carefully as variations exist within the ADUM347x series regarding channel directionality and packaging formats.

Selection Notes

Select this component when a combined signal isolation and isolated power solution is required in a compact footprint. It is suitable for applications needing 2W of isolated power without external magnetics. Consider the bidirectional nature of the channels and the integrated driver capabilities when designing the isolation barrier.

Part Context

This part belongs to the ADUM347x family of digital isolators designed by Analog Devices. The series leverages silicon dioxide (SiO2) based iCoupler technology to achieve high performance in a small package. Other variants in the family differ primarily in channel configuration, such as unidirectional versus bidirectional paths, while sharing similar core isolation and power management features.

Replacement Considerations

Direct substitutes include other members of the ADUM347x series, such as ADUM3470ARSZ or ADUM3470CRSZ, depending on the required channel directionality and packaging format. Verify that alternative parts maintain the same insulation voltage and operating temperature range.