ADUM1401BRW

Overview

The ADUM1401BRW is a quad-channel digital isolator from Analog Devices, utilizing iCoupler magnetic coupling technology. It features four independent channels with a unidirectional configuration (3 Tx / 1 Rx). The device supports data rates up to 10 Mb/s and provides an isolation voltage of 2500 Vrms. It operates on a single power supply ranging from 2.7 V to 5.5 V. Key electrical parameters include a propagation delay of 32 ns, typical rise/fall times of 3 ns, and a pulse width distortion of 1000 ns. The component is housed in a 16-lead SOIC package and functions within a temperature range of -40°C to +105°C.

Feature Summary

• Implements iCoupler magnetic coupling technology to replace traditional optocouplers, eliminating issues related to current transfer ratio instability and non-linear transfer functions.
• Provides robust signal isolation with high common-mode transient immunity, ensuring reliable operation in electrically noisy environments without external driver components.
• Features a patented refresh mechanism that maintains DC correctness for input logic states even when one side of the isolator lacks power.

Applications

• Isolation of SPI interfaces and data converters
• General-purpose multi-channel signal isolation
• Industrial fieldbus systems

Procurement Notes

Verify the specific suffix against official documentation to confirm performance grades and packaging formats. Ensure compatibility with system voltage requirements and thermal constraints. Confirm RoHS compliance status through manufacturer datasheets prior to integration.

Selection Notes

Select this component for applications requiring low-power, high-reliability digital isolation where bidirectional communication is not necessary. It serves as a direct replacement for optocouplers in designs demanding improved speed and reduced board space. Consider the unidirectional channel layout when mapping input and output signals.

Part Context

This part belongs to the ADuM1400/ADuM1401/ADuM1402 family of quad-channel digital isolators. These devices are designed to offer superior performance over conventional optocouplers by leveraging CMOS process technology and on-chip transformer capabilities for efficient signal transmission across isolation barriers.

Replacement Considerations

Direct functional substitutes within the same family include the ADUM1400 and ADUM1402. Verify pinout compatibility and specific channel configurations before swapping between these variants.