**ADUM3402CRWZ: A Comprehensive Guide to the Quad-Channel Digital Isolator**

In the world of electronic design, ensuring signal integrity and protecting sensitive circuitry from high voltages and ground loops is paramount. The **ADUM3402CRWZ** from Analog Devices stands as a critical component in this endeavor, offering robust isolation in a compact package. This quad-channel digital isolator leverages **Analog Devices' renowned iCoupler® technology** to provide superior performance compared to traditional optocoupler-based solutions.

The core function of the ADUM3402CRWZ is to transmit digital signals across an isolation barrier. It features **four independent isolation channels**, which can be configured in a variety of channel directions (e.g., 3 in/1 out, 2 in/2 out) to suit diverse application needs. Each channel utilizes high-speed CMOS technology coupled with monolithic air-core transformer technology, enabling **data rates of up to 150 Mbps** while consuming significantly less power than optocouplers. This makes it ideal for applications requiring both high speed and low power consumption.

A key advantage of this isolator is its **high common-mode transient immunity (CMTI) of >100 kV/μs**. This specification is crucial in noisy industrial environments where rapid voltage transients at the isolation barrier could cause data corruption. The ADUM3402CRWZ effectively rejects these transients, ensuring reliable data transmission. Furthermore, it supports **isolation ratings of up to 5.0 kV RMS** for one minute, providing a critical safety margin for high-voltage applications.

The device operates from a **wide supply voltage range of 2.5 V to 5.5 V**, allowing for seamless interfacing with both 3.3 V and 5 V logic families without the need for additional level-shifting components. Its default output state is high, which can be a critical safety feature in ensuring a known state during power-up or fault conditions. Housed in a narrow-body, 16-lead SOIC_W package, it meets international safety standards including UL, CSA, and VDE.

Typical applications for the ADUM3402CRWZ are extensive. It is indispensable in **industrial automation** for isolating PLCs, motor controls, and data acquisition systems. In power electronics, it provides isolation in solar inverters, battery management systems (BMS), and switch-mode power supplies (SMPS). It also finds use in medical equipment for patient safety isolation and in isolated communication interfaces like RS-485, CAN, and SPI.

**ICGOO**

**DFIND**

In summary, the ADUM3402CRWZ is an exceptionally versatile and high-performance quad-channel digital isolator. Its combination of high speed, robust isolation, excellent noise immunity, and low power consumption makes it a superior choice for designers across industrial, renewable energy, medical, and automotive sectors, ensuring both system safety and data reliability.

**Keywords:** Digital Isolator, iCoupler Technology, Common-Mode Transient Immunity (CMTI), Signal Integrity, High Voltage Isolation.