ADUM3481BRSZ

Overview

The ADUM3481BRSZ is a quad-channel digital isolator utilizing Analog Devices iCoupler technology. It provides bidirectional signal isolation with a maximum data rate of 25 Mb/s and a common-mode transient immunity of 25 kV/µs. The device operates within a supply voltage range of 3 V to 5.5 V, drawing typical quiescent currents of 6.7 mA or 7.9 mA per channel depending on the logic state. It features a propagation delay of 33 ns and supports an operating temperature range from -40°C to +125°C. Packaged in a 20-lead SSOP, it offers 3750 Vrms isolation voltage.

Feature Summary

• Integrates four independent digital channels for high-density signal isolation
• Utilizes monolithic air core transformer technology for magnetic coupling
• Provides robust common-mode transient immunity against fast voltage spikes
• Supports bidirectional data transmission across isolation barriers

Applications

• Industrial automation control systems requiring galvanic isolation
• Medical equipment needing reinforced safety isolation
• Power metering and energy monitoring circuits
• Inverter drives and motor control interfaces

Procurement Notes

Verify the specific suffix BRSZ confirms the unidirectional variant if required, as the base model may vary. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the SSOP-20 package dimensions match the target PCB footprint exactly. Check for any recent lifecycle notices regarding obsolescence or alternative recommendations directly from Analog Devices.

Selection Notes

Select this component when bidirectional communication is required across the isolation barrier. Compare power consumption metrics against unidirectional alternatives like the ADUM3482 if lower current draw is critical. Ensure the 25 Mb/s data rate meets system timing requirements. Verify that the 3750 Vrms isolation rating satisfies the specific safety standards applicable to the end application environment.

Part Context

This part belongs to the ADuM348x family of small, quad-channel digital isolators. These devices are designed to replace traditional optocouplers in space-constrained applications. The family includes variants with different channel directions and data rates, all sharing the same compact SSOP-20 package and core iCoupler architecture for consistent performance characteristics.

Replacement Considerations

The EVAL-ADUM3481EBZ serves as an evaluation board for this series but is not a functional replacement. Direct pin-compatible substitutes within the same family include the ADUM3480ARSZ for bidirectional operation or the ADUM3482ARSZ for unidirectional needs, provided the data rate and directionality align with design requirements.