ADUM1252AUA+T

Overview

The ADUM1252AUA+T is a dual-channel bidirectional digital isolator utilizing iCoupler magnetic coupling technology. It supports I2C and SMBus protocols with data rates up to 2 MHz. The device features independent power supplies for both sides, ranging from 1.71 V to 5.5 V, enabling voltage level translation. It includes integrated hot-swap protection on the secondary side to prevent bus contention during connection. The component operates within an ambient temperature range of -40°C to +125°C and is housed in an 8-lead MSOP package.

Feature Summary

• Integrated hot-swap protection prevents bus contention by pre-charging pins and monitoring bus states before connection.
• Dual independent power domains support flexible voltage level shifting between 1.71 V and 5.5 V rails.
• Low output logic low voltage on the primary side enhances compatibility with various I2C slave devices.

Applications

• I2C and SMBus interface isolation
• Battery management systems
• Power over Ethernet (PoE) controllers
• Motor control systems

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer designation matches Analog Devices Inc. or Maxim Integrated legacy branding. Ensure the component meets RoHS compliance requirements for your region. Validate that the 8-lead MSOP footprint aligns with your PCB layout constraints.

Selection Notes

Select this component for applications requiring robust I2C isolation with hot-swap capabilities. The wide supply voltage range accommodates diverse logic levels without external translators. Consider the thermal performance and package size relative to system density requirements. Verify that the 2 MHz maximum data rate satisfies the communication speed needs of the target bus topology.

Part Context

This part belongs to the ADuM125x family of high-speed digital isolators designed for I2C applications. It leverages iCoupler technology to provide galvanic isolation without the need for external transformer drivers. The series addresses common challenges in multi-controller bus topologies and cross-domain signal integrity.

Replacement Considerations

The ADUM1250ARZ serves as a related variant within the same family but lacks the integrated hot-swap protection feature found in the ADUM1252. Designers must evaluate whether the additional complexity of the ADUM1252 is necessary for their specific bus environment.