ADUM3402CRWZ

Overview

The ADUM3402CRWZ is a quad-channel digital isolator utilizing Analog Devices iCoupler technology, which integrates high-speed CMOS circuitry with monolithic air-core transformer coils. This component provides bidirectional signal isolation across four independent channels within a single 16-lead SOIC package. It operates on a supply voltage range of 2.7 V to 5.5 V and supports data rates up to 90 Mb/s. The device offers a common-mode transient immunity of 25 kV/µs and an insulation voltage rating of 2500 Vrms. Typical propagation delay is 32 ns, with rise and fall times of approximately 3 ns. It functions reliably within an industrial temperature range from -40°C to +105°C.

Feature Summary

• Integrates four independent bidirectional digital channels using proprietary magnetic coupling technology for galvanic isolation.
• Provides high common-mode transient immunity to reject noise spikes in electrically noisy environments.
• Eliminates the need for external bootstrap capacitors or isolated power supplies typically required by optical isolators.
• Maintains signal integrity with low pulse width distortion and consistent propagation delays across all channels.

Applications

• Isolating microcontroller buses such as SPI, I2C, and UART in industrial automation systems.
• Protecting gate drive signals in motor control applications involving high-voltage inverters.
• Connecting sensor interfaces in medical equipment requiring strict safety isolation standards.
• Implementing isolated communication links in energy metering and smart grid infrastructure.

Procurement Notes

Verify the specific suffix CRWZ to confirm the tape-and-reel packaging format and commercial temperature grade. Confirm RoHS compliance status and lead-free finish requirements against current regulatory standards. Check for any recent product change notices regarding manufacturing site transfers or datasheet revisions that may affect pin compatibility or electrical specifications. Ensure the supplier provides traceability documentation for critical industrial or medical deployments.

Selection Notes

Choose this component when bidirectional data flow is required across the isolation barrier, unlike unidirectional variants in the same family. Select based on the 90 Mb/s data rate requirement; lower speed options like the ADUM3402BRWZ offer reduced power consumption if bandwidth permits. Consider the 16-SOIC package constraints for PCB layout and thermal management. Evaluate the 2500 Vrms isolation rating against system safety clearance and creepage distance requirements.

Part Context

The ADUM3402CRWZ belongs to the ADuM340x series of quad-channel digital isolators from Analog Devices. This series leverages iCoupler technology to replace traditional optocouplers, offering superior performance in terms of speed, size, and reliability. The part is designed for applications demanding robust isolation between low-voltage digital logic and high-voltage power stages or noisy environments.

Replacement Considerations

The ADUM3402BRWZ serves as a verified alternative within the same package, offering identical functionality but with a lower maximum data rate of 10 Mbps. Other members of the ADuM340x family, such as the ADUM3400 or ADUM3401, provide different channel configurations (unidirectional or mixed) rather than direct functional replacements for the quad-bidirectional topology.