ADUM1254ASA+

Overview

The ADUM1254ASA+ is a digital isolator manufactured by Analog Devices, designed for galvanic isolation in electronic circuits. It features two open-drain channels configured as one unidirectional and one bidirectional path, making it suitable for I2C applications. The device operates within a supply voltage range of 2.25 V to 5.5 V and draws a typical operating current of 1 mA. Key electrical parameters include an insulation voltage of 848 Vrms and a propagation delay of 128.4 ns. It supports data rates up to 10 Mb/s with a maximum fall time of 64.7 ns and pulse width distortion of 94.2 ns. The component functions reliably across a temperature range of -40°C to +85°C and is housed in a WSOIC-8 surface-mount package.

Feature Summary

• Provides galvanic isolation with two open-drain channels supporting both unidirectional and bidirectional signal transmission.
• Optimized for I2C bus isolation applications requiring low power consumption and high reliability.
• Operates over an extended industrial temperature range with robust electromagnetic interference immunity.

Applications

• Isolation of I2C buses in industrial control systems
• Signal isolation in measurement and sensor interfaces
• Protection of microcontroller communication lines in noisy environments

Procurement Notes

Verify the specific suffix 'ASA+' against the manufacturer's official datasheet to confirm pinout compatibility and package dimensions. Ensure that the procurement source provides valid RoHS compliance documentation. Confirm that the supplier can guarantee authenticity through traceable channels, as counterfeit components may exhibit incorrect insulation ratings or channel functionality.

Selection Notes

Select this component when designing systems requiring isolated I2C communication with mixed directionality needs. Consider the 848 Vrms insulation rating for safety requirements and the 1 mA current consumption for low-power battery-operated devices. Evaluate the WSOIC-8 package size against available PCB space constraints and thermal management requirements for the target application environment.

Part Context

The ADUM1254ASA+ belongs to the ADUM125x family of digital isolators from Analog Devices. This series utilizes capacitive isolation technology to provide high-speed data transmission while maintaining electrical isolation between circuit sections. The part is distinct from other variants in the family by its specific channel configuration and package type, serving as a specialized solution for bidirectional serial communication protocols.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official cross-reference guide for verified alternatives.