ADUM1250SRZ

Overview

The ADUM1250SRZ is a dual-channel digital isolator from Analog Devices, designed for hot-swappable I²C interfaces. It features magnetic coupling technology with a 2500 Vrms isolation rating and supports bidirectional communication at data rates up to 1 Mbps. The device operates within a supply voltage range of 3 V to 5.5 V and includes integrated hot-swap protection circuits to prevent bus faults during insertion. Packaged in an 8-lead SOIC, it functions reliably across an industrial temperature range of -40°C to +105°C.

Feature Summary

• Integrated hot-swap protection circuitry prevents data corruption when inserting unpowered cards into active buses
• Provides two fully bidirectional channels compatible with standard I²C, SMBus, and PMBus protocols without signal splitting
• Utilizes iCoupler magnetic technology for galvanic isolation without the need for external transformer drivers

Applications

• Isolated I²C, SMBus, or PMBus interface connections
• Multi-master I²C bus systems requiring electrical isolation
• Battery management systems (BMS) in hybrid electric vehicles
• Industrial automation and motor control applications

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm package type and tape/reel specifications. Ensure the component matches the required isolation voltage ratings for your safety standards. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status, as supply constraints may apply to this evaluation-grade or specific reel configuration.

Selection Notes

Select this component when designing isolated I²C interfaces that require hot-swap capability to protect the bus during dynamic insertion events. It is suitable for applications needing robust galvanic isolation between microcontrollers and peripheral devices. Consider the 8-lead SOIC package constraints and ensure the operating voltage aligns with the 3V to 5.5V specification range for reliable logic level translation.

Part Context

This part belongs to the ADuM125x family of digital isolators, which are optimized for high-speed I²C communication. The SRZ designation indicates a specific surface-mount SOIC-8 packaging variant. These devices replace traditional optocouplers by offering higher speed, lower power consumption, and better reliability through on-chip transformer technology.

Replacement Considerations

Official substitutes include ADUM1250ARZ and ADUM1250BRZ for equivalent performance in tube packaging. For different package requirements, consider ADUM1250ARZ-RL7 for reel-based assembly. Verify pinout compatibility and isolation ratings before substituting.