ADUM1251WARZ-RL7

Overview

The ADUM1251WARZ-RL7 is a hot-swappable digital isolator featuring two bidirectional communication channels designed for I2C interfaces. It utilizes iCoupler magnetic coupling technology to provide electrical isolation without the need for external components. The device operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 400 kb/s. Key electrical parameters include an insulation voltage of 2500 Vrms, a propagation delay of 162 ns, and low power consumption with operating currents of 2.5 mA and 2.8 mA. It functions reliably across an extended temperature range from -40°C to +105°C and is housed in an SOIC-8 surface-mount package.

Feature Summary

• Integrates dedicated hot-swap circuitry to prevent data corruption during live bus insertion or removal
• Provides galvanic isolation via on-chip transformer technology eliminating bulky discrete components
• Supports bidirectional signal transmission compatible with standard I2C protocol requirements

Applications

• Isolated I2C interface connections
• Multi-master I2C bus systems
• Industrial automation control modules
• Battery management system communications

Procurement Notes

Verify component authenticity through authorized Analog Devices distributors or certified partners. Confirm that the specific suffix matches the required packaging format. Check current availability status as supply constraints may affect lead times. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet to maintain reliability before soldering.

Selection Notes

Select this component when designing systems requiring robust protection against hot-swap events on I2C buses. Consider the bidirectional nature of the channels for complex multi-master topologies. Evaluate the thermal performance within the specified operating range for harsh environments. Compare power consumption metrics against other isolators if energy efficiency is a primary design constraint.

Part Context

This part belongs to the ADUM1251 series of dual-channel digital isolators. It shares architectural similarities with the ADUM1250 but includes enhanced features for handling dynamic bus conditions. The series is widely recognized for replacing traditional optocouplers in space-constrained applications requiring high reliability and fast switching speeds.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.