ADUM2281ARIZ-RL

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 unidirectional signal transmission in a 1/1 channel configuration. Key electrical parameters include a maximum propagation delay of 50ns for both high-to-low and low-to-high transitions, with a typical rise and fall time of 2.5ns. The component is housed in a 16-SOIC package.

Feature Summary

• Utilizes proprietary iCoupler magnetic coupling technology for robust signal isolation without external transformers.
• Provides high common-mode transient immunity to prevent false triggering in noisy environments.
• Supports bidirectional power delivery through integrated isolated DC-DC converter capability when paired with appropriate external components.

Applications

• Isolated communication interfaces such as SPI and UART in industrial automation systems.
• Gate drive circuits requiring galvanic isolation for power electronics.
• Medical equipment requiring reinforced isolation for patient safety compliance.

Procurement Notes

Verify the specific suffix 'ARIZ-RL' against the manufacturer's current datasheet to confirm pinout compatibility and packaging type. Ensure that the required isolation voltage ratings align with your system's safety standards. Check for moisture sensitivity level (MSL) requirements during storage and handling to prevent package damage before reflow soldering.

Selection Notes

Select this component when high-speed digital isolation is required with minimal propagation delay. The 16-pin SOIC package offers a compact footprint suitable for dense PCB layouts. Consider the 5000Vrms isolation rating for applications demanding high dielectric strength between isolated domains.

Part Context

This part belongs to the ADuM228x family of dual-channel digital isolators. It shares architectural similarities with other iCoupler devices but is optimized for general-purpose digital isolation tasks. The family emphasizes low power consumption and high reliability compared to traditional optocoupler solutions.

Replacement Considerations

Direct replacements within the same family include the ADUM2280 and ADUM2281 variants, which differ primarily in channel directionality. Verify functional equivalence regarding propagation delay and isolation voltage before substitution.