ADUM3470WCRSZ-RL7

Overview

The ADUM3470WCRSZ-RL7 is a four-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It integrates a PWM controller and transformer driver to support isolated DC/DC power conversion. The device operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 25 Mb/s. It provides an insulation voltage of 2500 Vrms and functions reliably across a temperature range of -40°C to +105°C. Packaged in a 20-pin SSOP, it meets AEC-Q100 automotive qualification standards.

Feature Summary

• Integrates PWM controller and transformer driver for isolated DC/DC converter applications
• Provides bidirectional signal isolation via magnetic coupling technology
• Supports high common-mode transient immunity for robust noise rejection
• Includes protection features such as soft-start and thermal shutdown

Applications

• Isolated DC/DC power supply designs
• Industrial fieldbus isolation
• RS-232/RS-422/RS-485 transceiver isolation
• Gate drive isolation for power switches

Procurement Notes

Verify the specific suffix 'W' indicates wide operating temperature or package variant compliance with your design requirements. Confirm AEC-Q100 qualification status if automotive application is intended. Check current availability as distribution may be limited. Ensure the SSOP-20 footprint matches your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when bidirectional isolation is required alongside integrated power management capabilities. It is suitable for designs needing to generate isolated bias voltages without external transformers. Compare channel count and data rate against alternatives like the ADUM3472 if unidirectional flow is sufficient. Verify that the 2500 Vrms insulation rating meets your safety certification needs.

Part Context

This part belongs to the ADuM347x series of digital isolators from Analog Devices. The series combines signal isolation with power conversion functionality on a single chip. Other variants in the family include ADUM3470, ADUM3471, ADUM3472, ADUM3473, and ADUM3474, differing primarily in channel directionality and configuration.

Replacement Considerations

ADUM3470ARSZ-RL7 is a related bidirectional variant within the same series. ADUM3470CRSZ-RL7 is another bidirectional option. Verify pinout compatibility and electrical specifications before substituting.