ADUM1255ASA+T

Overview

The ADUM1255ASA+T is a digital isolator manufactured by Analog Devices Inc. It features two channels within an SOIC-8 package, utilizing magnetic coupling for galvanic isolation. The device supports bidirectional and unidirectional signal transmission with a maximum insulation voltage of 848 Vrms. It operates on a supply voltage ranging from 2.25 V to 5.5 V, drawing a typical operating current of 1 mA. The component functions reliably across a temperature range of -40°C to +85°C.

Feature Summary

• Provides galvanic isolation between circuits using magnetic coupling technology
• Supports mixed channel configurations including one open-drain bidirectional and one unidirectional channel
• Designed for low power consumption with minimal operating current requirements

Applications

• Isolated I2C interfaces
• SMBus communication links
• PMBus monitoring systems
• Industrial automation control loops
• Battery management system data acquisition

Procurement Notes

Verify the specific suffix against official manufacturer documentation to confirm tape-and-reel packaging and exact pinout configuration. Ensure the component meets required safety certifications such as UL or VDE standards for your specific application environment. Cross-reference the datasheet revision date to validate parameter accuracy before finalizing procurement specifications.

Selection Notes

Select this component when mixed directional isolation is required within a compact footprint. The dual-channel design allows integration of both bidirectional control lines and unidirectional data paths in a single package. Consider the thermal performance and propagation delay characteristics relative to the target system speed requirements during the design phase.

Part Context

This part belongs to the ADUM125x family of digital isolators from Analog Devices. These devices replace traditional optocouplers by offering superior performance in terms of speed, power efficiency, and size. The family is engineered to provide robust signal transmission across isolation barriers while maintaining high reliability in demanding electronic environments.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify that any substitute maintains identical channel directionality and insulation voltage ratings.