ADUM3481ARSZ

Overview

The ADUM3481ARSZ is a small, quad-channel digital isolator from Analog Devices Inc., utilizing iCoupler technology. It provides 3750 Vrms isolation voltage with a common-mode transient immunity of 25 kV/µs. The device supports data rates up to 1 Mbps and features maximum propagation delays of 90 ns. It operates on supply voltages ranging from 1.8 V to 5.5 V for both sides and functions within a temperature range of -40°C to +125°C. Packaged in a 20-SSOP housing.

Feature Summary

• Integrates four independent channels for bidirectional or unidirectional signal isolation using magnetic coupling technology.
• Provides robust electrical isolation with high common-mode transient immunity to protect sensitive circuitry.
• Supports wide operating supply voltage ranges compatible with various logic families without external level shifting.

Applications

• Industrial automation systems requiring galvanic isolation between control and sensor interfaces.
• Medical equipment needing isolated communication links for patient safety compliance.
• Power electronics monitoring circuits where high-voltage noise rejection is critical.

Procurement Notes

Verify the specific suffix (ARSZ) against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure compatibility with your PCB footprint requirements for the 20-SSOP package. Cross-reference the datasheet revision date to confirm current technical parameters before finalizing procurement decisions.

Selection Notes

Select this component when four isolated channels are required in a compact form factor. Consider the 1 Mbps data rate limit and 90 ns propagation delay for timing-sensitive designs. Evaluate the 3750 Vrms isolation rating against system voltage requirements. Compare power consumption characteristics if battery operation is a constraint.

Part Context

This part belongs to the ADuM348x family of quad-channel digital isolators. It shares architectural similarities with the ADUM3480 and ADUM3482, differing primarily in channel directionality configurations. The series leverages silicon dioxide insulation layers for reliable long-term performance in harsh environments.

Replacement Considerations

Official substitutes include the ADUM3480 and ADUM3482 variants within the same family. Verify pinout compatibility and channel directionality differences before substitution. Check for updated datasheet revisions that may affect parameter tolerances or recommended operating conditions.