ADUM1252AUA+

Overview

The ADUM1252AUA+ is a dual-channel bidirectional digital isolator utilizing iCoupler magnetic coupling technology. It supports I2C and SMBus interfaces with data rates up to 2 MHz. The device features independent power supplies on both sides, ranging from 1.71 V to 5.5 V, enabling voltage level translation. It provides galvanic isolation with an insulation voltage of 300 Vrms and operates within a temperature range of -40°C to +125°C in an 8-pin MSOP package.

Feature Summary

• Integrated hot-swappable protection for the second side prevents bus contention during connection by pre-charging pins and monitoring bus states.
• Low output logic low voltage on the first side enhances I2C device compatibility across different voltage domains.
• Independent wide supply voltage ranges on both sides support flexible logic level interfacing without external components.

Applications

• Isolated I2C/SMBus interface connections
• Battery management systems requiring isolated communication
• Power over Ethernet (PoE) controller interfaces
• Motor control system isolation

Procurement Notes

Verify the specific suffix 'AUA+' corresponds to the MSOP-8 package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation. Check current availability as distribution may be limited or subject to allocation. Ensure design-in reviews account for the specific thermal characteristics of the narrow body MSOP footprint.

Selection Notes

Select this component when high-speed I2C isolation up to 2 MHz is required alongside hot-swap capabilities. The independent supply rails allow seamless translation between 1.8V and 5.5V logic levels. Consider the MSOP-8 package constraints for board space. Validate that the 300 Vrms insulation rating meets the safety requirements of the target application environment.

Part Context

This part belongs to the ADuM125x family of digital isolators from Analog Devices. It shares functional similarities with the ADUM1250 and ADUM1251 but offers higher data rate performance. The family utilizes proprietary iCoupler technology for robust signal transmission across isolation barriers without optical components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify cross-references with Analog Devices directly for equivalent or pin-compatible alternatives.