ADUM2281ARIZ

Overview

The ADUM2281ARIZ-RL is a dual-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It provides 5000Vrms isolation with a data rate of 1Mbps and common-mode transient immunity of 25kV/µs. The device operates on a single supply voltage between 3V and 5.5V. It features two unidirectional channels in a 16-SOIC package, with maximum propagation delays of 50ns for both high-to-low and low-to-high transitions.

Feature Summary

• Utilizes proprietary iCoupler magnetic coupling technology for signal transmission without external magnetics
• Provides robust electrical isolation rated at 5000Vrms to protect sensitive circuitry
• Offers high common-mode transient immunity of 25kV/µs for reliable operation in noisy environments

Applications

• Industrial automation systems requiring galvanic isolation
• Medical equipment needing patient isolation barriers
• Power electronics control circuits

Procurement Notes

Verify the specific suffix (e.g., -RL) matches the required packaging format such as tape and reel. Confirm the operating temperature range aligns with system requirements. Ensure the 16-SOIC footprint fits the PCB layout constraints. Check for RoHS compliance status if mandated by project specifications.

Selection Notes

Select this component when bidirectional communication is not required, as it supports only unidirectional channels. Consider the 1Mbps speed limit against higher-speed application needs. Evaluate the 50ns propagation delay for timing-critical designs. Compare power consumption against other iCoupler variants if efficiency is a primary constraint.

Part Context

This part belongs to the ADUM228x series of small, dual-channel digital isolators. It shares the iCoupler architecture with other members like the ADUM2280 and ADUM2281, differing primarily in channel directionality and configuration options within the same 16-pin SOIC form factor.

Replacement Considerations

The ADUM2281ARIZ is functionally similar to the ADUM2281ARIZ-RL, differing mainly in packaging quantity rather than electrical performance. Verify pinout compatibility before substituting with other dual-channel isolators from different manufacturers.