ADUM6421ABRNZ5

Overview

The ADUM6421ABRNZ5 is a quad-channel digital isolator featuring an integrated isolated DC-to-DC converter. It provides four channels of data isolation with a 3:1 directionality configuration, supporting data rates up to 100 Mb/s. The device offers 5000 Vrms insulation voltage and 75 kV/µs common-mode transient immunity. It operates within a supply voltage range of 4.5 V to 5.5 V and functions across a temperature range of -40°C to +125°C. Packaged in a 28-pin SOIC (BSSOP) format, it combines signal isolation with power delivery.

Feature Summary

• Integrates a high-frequency isolated DC-to-DC converter to provide power to the secondary side without external magnetics
• Provides robust galvanic isolation for four independent bidirectional or unidirectional data channels
• Features low electromagnetic interference characteristics suitable for noise-sensitive applications
• Includes shutdown functionality to minimize power consumption during idle periods

Applications

• Industrial automation systems requiring isolated communication interfaces
• Medical equipment needing reinforced isolation for patient safety
• Automotive electronics utilizing CAN bus or LIN bus networks
• Power metering devices with isolated measurement circuits

Procurement Notes

Verify the specific suffix designation to ensure compatibility with required packaging and tape-and-reel specifications. Confirm that the 3:1 channel directionality aligns with the system architecture, as this variant differs from symmetric configurations. Check for lead time constraints due to potential limited availability status. Ensure the operating environment remains within the specified thermal limits for long-term reliability.

Selection Notes

Select this component when a compact solution combining signal isolation and isolated power generation is required. The 3:1 data directionality suits applications where most signals flow in one direction while maintaining a return path. Consider the 28-pin package size against board space constraints. Evaluate the need for integrated power conversion versus discrete solutions based on efficiency and complexity requirements.

Part Context

This part belongs to the ADuM642x family of quad-channel isolators with integrated converters. It shares architectural similarities with the ADUM6423A but differs in data directionality configuration. The family addresses the need for simplified design by eliminating external transformer components typically required for isolated power supplies in standard digital isolator designs.

Replacement Considerations

The ADUM6423ABRNZ5-RL serves as a functional alternative within the same family, offering similar isolation and power integration capabilities. Note that the ADUM6423A features a 1:3 data directionality configuration compared to the 3:1 orientation of the ADUM6421A. Verify pinout compatibility and control logic alignment before substitution.