Analog Devices Inc. ADUM1402WSRWZ

Overview

ADUM1402WSRWZ from Analog Devices is a quad-channel digital isolator based on iCoupler® transformer technology, providing galvanic isolation between two 3.3 V or 5 V domains with bidirectional signal transfer. It supports up to 90 Mbps data rate, delivers ≤2 ns pulse width distortion and ≤2 ns channel-to-channel matching, and operates reliably at 125°C ambient - ideal for automotive CAN/LIN bus interface isolation and high-noise industrial PLC I/O modules.

For engineers reviewing the ADUM1402WSRWZ datasheet, ADUM1402WSRWZ pinout, ADUM1402WSRWZ application, or ADUM1402WSRWZ equivalent, this page delivers verified specifications, automotive-grade safety certifications (UL 2500 Vrms, VDE 560 Vpeak), precise timing behavior under mixed-voltage operation (3 V/5 V level translation), and validated alternatives for functional replacement in safety-critical isolation designs.

Technical Context

The ADUM1402WSRWZ implements four independent unidirectional isolation channels - two input-side channels (A1, A2) and two output-side channels (B1, B2) - with dedicated enable control (EN1, EN2) per side. Its monolithic air-core transformer architecture eliminates LED/photodiode aging and CTR drift, enabling guaranteed DC correctness via patented refresh circuitry even during static input conditions or single-supply loss.

It supports asymmetric supply configurations: VDD1 = 2.7–5.5 V and VDD2 = 2.7–5.5 V independently, enabling robust 3 V ↔ 5 V level translation across the isolation barrier. The CRW grade variant achieves 18–32 ns propagation delay (tPHL/tPLH) and <2 ns pulse width distortion at 90 Mbps, with common-mode transient immunity exceeding 25 kV/µs under both logic-high and logic-low output states.

Key Specifications

Pinout & Package

ADUM1402WSRWZ is housed in a 16-lead SOIC wide-body package (7.5 mm body width, 10.3 mm length) with creepage/clearance ≥8.3 mm, compliant with DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad-channel digital isolator applications.

Compared with SI8642ED-IS and ISO6742QDWR, ADUM1402WSRWZ uniquely combines AEC-Q100 qualification, integrated DC-correct refresh, native 3 V/5 V level translation, and 90 Mbps performance - making it optimal for automotive and industrial systems requiring both functional safety and signal integrity across voltage domains.

Availability

ADUM1402WSRWZ is available at Aetrix Electronics and suitable for automotive battery management, industrial PLC I/O, and medical patient monitoring systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADUM1402WSRWZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, and automotive markets since 1965.

The ADuM140x family was designed specifically for high-reliability galvanic isolation in safety-critical systems - emphasizing low timing skew, automotive temperature range, and regulatory compliance (UL, VDE, IEC) over cost-optimized consumer-grade alternatives.

FAQ

What is the maximum data rate supported by ADUM1402WSRWZ?

ADUM1402WSRWZ supports a maximum data rate of 90 Mbps in NRZ format, verified under load conditions (CL = 15 pF, CMOS levels) with pulse width distortion guaranteed ≤2 ns. This enables reliable isolation of high-speed SPI clocks up to 45 MHz and CAN FD bit streams at 5 Mbps, provided PCB layout follows controlled-impedance routing guidelines and proper decoupling is implemented on both VDD1 and VDD2 rails.

Does ADUM1402WSRWZ support level translation between 3 V and 5 V domains?

Yes, ADUM1402WSRWZ natively supports bidirectional level translation: VDD1 can operate from 2.7 V to 5.5 V independently of VDD2, which also ranges from 2.7 V to 5.5 V. In 3 V/5 V configuration, logic thresholds adapt automatically (VIH = 1.6 V on 3 V side, 2.0 V on 5 V side), eliminating external level shifters for interfaces such as 3.3 V microcontrollers communicating with 5 V sensors or actuators.

How does the refresh feature in ADUM1402WSRWZ ensure DC correctness?

ADUM1402WSRWZ incorporates a patented internal refresh circuit that periodically samples and retransmits the last valid input state across the isolation barrier - ensuring output stability even when input signals remain static for extended periods or when one supply rail (VDD1 or VDD2) is unpowered. This eliminates the need for external watchdog timers or periodic toggling in safety-critical hold-state applications like relay control or fault flag latching.

What safety certifications apply to ADUM1402WSRWZ?

ADUM1402WSRWZ carries UL 1577 certification (2500 Vrms for 1 minute), DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 560 Vpeak, and complies with IEC/EN/CSA 62368-1, IEC/CSA 60601-1, and IEC/CSA 61010-1. These ratings validate its suitability for reinforced insulation in automotive, industrial, and medical equipment where patient or operator protection is mandated.

Can ADUM1402WSRWZ replace optocouplers in existing designs without layout changes?

ADUM1402WSRWZ uses a pin-compatible 16-lead SOIC wide-body footprint identical to industry-standard quad optocouplers (e.g., HCPL-0723), enabling drop-in replacement in most cases. However, due to its lower supply current (e.g., 1.5 mA vs. 10+ mA for optocouplers), decoupling capacitor values may require adjustment, and unused enable pins (EN1/EN2) must be pulled high to maintain default operation - confirming schematic and layout review is recommended before substitution.