ADUM1253AUA+T

Overview

The ADuM1253AUA+T is a two-channel digital isolator utilizing proprietary capacitive coupling technology. It provides galvanic isolation for I2C applications with one unidirectional and one bidirectional channel. The device operates within a supply voltage range of 2.25 V to 5.5 V. It features an operating temperature range from -40°C to +125°C. The component is housed in an 8-MSOP package.

Feature Summary

• Provides galvanic isolation for I2C bus signals using capacitive coupling technology
• Integrates one unidirectional and one bidirectional open-drain channel
• Supports operation across extended industrial temperature ranges

Applications

• I2C bus isolation in industrial control systems
• Isolation for sensor interfaces requiring bidirectional data transfer
• Protection of low-voltage logic circuits in noisy environments

Procurement Notes

Verify the specific suffix 'AUA+T' against official Analog Devices documentation to confirm the 8-MSOP package and tape-and-reel orientation. Ensure compatibility with existing PCB footprints, as MSOP dimensions differ from SOIC variants. Confirm RoHS compliance status through current manufacturer declarations before finalizing procurement plans.

Selection Notes

Select this component when designing I2C interfaces that require bidirectional communication alongside unidirectional signal transmission. The dual-channel architecture simplifies board layout compared to discrete solutions. Verify that the required isolation voltage and CMTI specifications meet system safety standards. Consider thermal performance if operating near the upper temperature limit.

Part Context

This part belongs to the ADuM125x family of ultra-low-power I2C digital isolators. The series leverages silicon dioxide (SiO2) insulation technology for high reliability. Other members include the ADUM1250, ADUM1251, and ADUM1252, which vary in channel directionality and configuration while sharing similar core isolation characteristics.

Replacement Considerations

The ADUM1252ASA+T is a related two-channel bidirectional isolator but lacks the mixed unidirectional/bidirectional configuration. Verify pinout compatibility and functional requirements before substitution. No direct public substitute part numbers are confirmed for this specific mixed-channel variant.