ADUM2281CRIZ-RL

Overview

The ADUM2281CRIZ-RL is a dual-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It provides 5000 Vrms isolation voltage with a common-mode transient immunity of 25 kV/µs. The device operates on a single supply voltage ranging from 2.7 V to 5.5 V and supports data rates up to 1 Mbps. Key electrical parameters include a maximum propagation delay of 20 ns, rise/fall times of approximately 3 ns, and a pulse width distortion of 10 ns. It functions within an operating temperature range of -40°C to +125°C and is housed in a 16-pin SOIC package.

Feature Summary

• Integrates two independent bidirectional channels for signal isolation using proprietary iCoupler magnetic coupling technology.
• Provides robust protection against high-voltage transients with a common-mode transient immunity rating of 25 kV/µs.
• Features low power consumption suitable for battery-operated applications while maintaining high-speed data transmission capabilities.

Applications

• Industrial automation systems requiring galvanic isolation between microcontrollers and sensors.
• Medical equipment interfaces needing certified isolation barriers for patient safety.
• Power electronics control circuits where noise immunity is critical for reliable operation.

Procurement Notes

Verify the specific suffix 'CRIZ' to ensure compatibility with required operating temperatures and packaging formats. Confirm that the 16-SOIC footprint matches your PCB layout constraints. Check current availability status as supply may be limited or subject to allocation. Ensure input voltage levels align with the specified 2.7 V to 5.5 V range for proper logic threshold interpretation.

Selection Notes

Select this component when bidirectional communication is required across an isolation barrier. Compare propagation delay specifications against system timing requirements to ensure signal integrity. Evaluate power budget constraints as this device offers low quiescent current compared to optical isolators. Consider the 5000 Vrms isolation rating relative to the working voltage of the application environment.

Part Context

This part belongs to the ADUM228x series of small form-factor digital isolators. It shares architectural similarities with other iCoupler devices but is distinguished by its bidirectional channel configuration and specific thermal ratings. The series emphasizes compact size and high reliability for space-constrained designs.

Replacement Considerations

Direct replacements must match the 16-SOIC package and bidirectional functionality. Verify equivalent isolation voltage ratings and data rate capabilities. Cross-reference pinouts to ensure compatibility without redesigning the printed circuit board layout.