ADUM1253AWA+

Overview

The ADUM1253AWA+ is an ultra-low-power I2C digital isolator featuring two open-drain channels. It supports bidirectional data transmission with one unidirectional SCL channel, making it suitable for I2C applications requiring hot-swap capability. The device operates within a supply voltage range of 1.71 V to 5.5 V and provides galvanic isolation with a rated insulation voltage of 445 Vrms. Key electrical parameters include a maximum propagation delay of 10 ns, operating supply currents of 146 µA and 270 µA, and propagation delays of 93.7 ns and 82.6 ns. It functions across a temperature range from -40°C to +85°C.

Feature Summary

• Ultra-low-power design optimized for I2C bus isolation
• Supports idle-bus hot-swap functionality with low VOL
• Provides extended VDD support for flexible system integration

Applications

• I2C bus isolation in industrial systems
• Applications requiring bidirectional data transmission on open-drain channels
• Systems needing idle-bus hot-swap capability

Procurement Notes

Verify availability status as the component may be subject to limited supply or special factory orders. Confirm RoHS compliance and package details (8-SOIC) against specific project requirements. Ensure compatibility with existing I2C bus specifications regarding voltage levels and timing constraints before procurement.

Selection Notes

Select this part when low power consumption and I2C-specific features like hot-swap are critical. Compare with ADUM1252 if bidirectional channels are required instead of mixed unidirectional/bidirectional configurations. Verify that the 8-SOIC package fits the PCB layout constraints and that the operating voltage range meets system power supply standards.

Part Context

This component belongs to the ADuM125x family of digital isolators from Analog Devices/Maxim Integrated. These devices utilize proprietary CMOS technology to provide high-speed signal isolation with low power consumption. The ADUM1253 variant specifically targets I2C applications, offering distinct channel configurations compared to other models in the series.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the available documentation. Users should consult official Analog Devices resources for qualified replacements or verify pin-to-pin compatibility with similar I2C isolators from the same manufacturer.