ADUM3470ARSZ

Overview

The ADUM3470ARSZ is a four-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It integrates a PWM controller and transformer driver for isolated DC/DC power conversion. The device operates on a single 3 V to 5.5 V supply with a maximum data rate of 25 Mb/s per channel. It provides an isolation voltage of 2500 Vrms and supports bidirectional signal transmission. Key electrical parameters include a propagation delay of 55 ns and a pulse width tolerance of 40 µs. The component functions within a temperature range of -40°C to +105°C and is housed in a 20-lead SSOP package.

Feature Summary

• Integrates PWM controller and transformer driver for generating isolated power supplies without external converters
• Utilizes iCoupler magnetic coupling technology for high-speed digital signal isolation
• Provides bidirectional data transmission across four independent channels
• Includes built-in protection mechanisms such as soft-start and thermal shutdown

Applications

• Isolated DC/DC converter designs requiring integrated control
• Industrial fieldbus isolation interfaces
• RS-232, RS-422, and RS-485 transceiver isolation
• Gate drive isolation for power switches
• Isolated sensor interface circuits

Procurement Notes

Verify the specific suffix 'ARSZ' to confirm the unidirectional configuration and tube packaging variant. Confirm RoHS compliance status through official manufacturer documentation. Ensure the order matches the required directionality, as other variants like ADUM3470CRSZ offer bidirectional options. Check current availability status directly with authorized distributors due to potential supply constraints.

Selection Notes

Select this part when designing isolated power systems that require integrated PWM control and signal isolation in a compact form factor. Choose the ARSZ variant specifically for unidirectional applications requiring tube packaging. Consider the 2500 Vrms isolation rating and 25 Mb/s data rate against system requirements. Evaluate the 55 ns propagation delay for timing-sensitive interfaces compared to higher-speed alternatives.

Part Context

This component belongs to the ADuM347x series of quad-channel digital isolators. The series shares common iCoupler technology but varies in channel directionality and packaging. The ADUM3470ARSZ specifically denotes the unidirectional version in a tube package, distinguishing it from reel-packaged or bidirectional counterparts within the same family.

Replacement Considerations

ADUM3470CRSZ offers identical electrical performance but features bidirectional channels and tube packaging. ADUM3470ARSZ-RL7 provides the same unidirectional functionality but utilizes reel packaging instead of tubes. Verify pin compatibility and directionality requirements before substituting.