ADUM1250ARZ-RL7

Overview

The ADUM1250ARZ-RL7 is a hot-swappable digital isolator featuring two nonlatching, bidirectional communication channels compatible with I²C interfaces. It supports data rates up to 1 Mbps and operates within a supply voltage range of 3 V to 5.5 V. The device provides an isolation voltage of 2500 Vrms and includes integrated thermal protection circuits to prevent data faults during hot insertion. It utilizes magnetic coupling technology for signal transmission across the isolation barrier.

Feature Summary

• Integrates hot-swap protection circuitry to maintain bus integrity when inserting unpowered cards into active systems
• Provides dual bidirectional channels specifically designed for complete isolation of standard I²C protocols without signal splitting
• Employs iCoupler magnetic coupling technology to achieve high common-mode transient immunity and compact form factor

Applications

• Isolated I²C, SMBus, or PMBus interface implementations
• Multi-drop I²C interface architectures in industrial automation
• Battery management systems (BMS) in hybrid electric vehicles
• Power supply control loops requiring galvanic isolation

Procurement Notes

Verify the specific suffix RL7 indicates reel packaging configuration distinct from tube variants. Confirm RoHS compliance status and lead-free certification against current regulatory requirements. Ensure the SOIC-8 package dimensions match your PCB footprint constraints. Validate that the 2500 Vrms isolation rating meets your safety standards for the intended application voltage levels.

Selection Notes

Choose this component when bidirectional I²C isolation with hot-swap capability is required. It eliminates the need for separate transmit and receive isolators compared to discrete optocoupler solutions. Consider the 162 ns propagation delay and 1 Mbps speed for timing-sensitive designs. Evaluate the 3 V to 5.5 V operating range against your system power rails.

Part Context

This part belongs to the ADuM1250 series of digital isolators from Analog Devices. It is part of the iCoupler family, which uses chip-level transformer technology. The series offers alternatives like the ADUM1251 for mixed channel configurations. These devices are designed to replace traditional optocouplers in space-constrained and high-speed applications.

Replacement Considerations

Direct functional substitutes include other ADuM125x series variants such as ADUM1251ARZ for different channel polarity needs. Verify pin compatibility and isolation voltage ratings when cross-referencing with competitor products. Ensure replacement parts support the same hot-swap functionality and I²C protocol compatibility.