ADUM1250ARZ

Overview

The ADUM1250ARZ is a dual-channel digital isolator utilizing iCoupler magnetic coupling technology. It features two bidirectional communication channels compatible with I²C interfaces, supporting data rates up to 1 Mbps. The device operates on a supply voltage range of 3 V to 5.5 V and provides an isolation voltage of 2500 Vrms. Key electrical parameters include a maximum propagation delay of 162 ns and a common-mode transient immunity of 25 kV/µs. It is housed in an 8-pin SOIC package and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Integrates two bidirectional channels for complete isolated I²C interface support without signal splitting
• Includes hot-swap protection circuitry to prevent data faults during insertion of unpowered cards into active buses
• Utilizes chip-level transformer technology for compact size and low power consumption compared to optical couplers

Applications

• Isolated I²C, SMBus, or PMBus interfaces
• Multi-master I²C interfaces
• Battery management systems (BMS) in hybrid electric vehicles
• Industrial automation and smart motion control
• Medical health equipment and instrumentation

Procurement Notes

Verify the specific suffix against official Analog Devices documentation to confirm packaging configuration, as variations exist between tube and reel formats. Ensure the component meets required insulation ratings for your application safety standards. Cross-reference the manufacturer part number with authorized distributors to confirm current availability status and lead times before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring robust isolation for bidirectional I²C communication. It is suitable for applications needing hot-swap capability and high common-mode transient immunity. Consider the 8-SOIC package constraints and operating temperature range relative to your system environment. Verify that the 2500 Vrms isolation rating aligns with your regulatory compliance requirements.

Part Context

This part belongs to the ADUM1250 series of digital isolators from Analog Devices. It is part of the iCoupler product family, which leverages silicon process integration to replace traditional optocouplers. The series offers advantages in speed, power efficiency, and reliability for industrial and automotive isolation applications.

Replacement Considerations

Check for direct pin-compatible alternatives within the ADUM12xx series. Verify if other variants offer different channel configurations or isolation voltages while maintaining the same SOIC-8 footprint.