Analog Devices Inc. ADUM242E0BRWZ

Overview

ADUM242E0BRWZ from Analog Devices is a quad-channel digital isolator based on iCoupler® technology, providing 5.0 kV_rms reinforced insulation for high-noise industrial and medical systems. It delivers 150 Mbps guaranteed data rate, 13 ns max propagation delay at 5 V, and operates across 1.8 V to 5 V supply rails with fail-safe low output configuration. It is used in isolated SPI interfaces for motor drives and PLC I/O modules.

For engineers reviewing the ADUM242E0BRWZ datasheet, ADUM242E0BRWZ pinout, ADUM242E0BRWZ application, or ADUM242E0BRWZ equivalent, key selection criteria include reinforced isolation rating (5.0 kV_rms), channel directionality (2 forward / 2 reverse), fail-safe low behavior, SOIC_W package creepage (7.8 mm), and compatibility with 1.8 V–5 V logic translation across the barrier.

Technical Context

The ADUM242E0BRWZ implements two independent forward-direction channels (A, B) and two reverse-direction channels (C, D), enabling bidirectional communication without external direction control. Its monolithic air-core transformer architecture ensures dc-correct output states even during input inactivity, eliminating optocoupler-style refresh requirements.

It features integrated undervoltage lockout (UVLO) with 1.6 V turn-on threshold and 0.1 V hysteresis per side, plus robust common-mode transient immunity of 100 kV/µs. The device supports fail-safe low operation-outputs default to logic low when VDD1 is unpowered or inputs are disabled-critical for safety-critical shutdown signaling.

Key Specifications

Pinout & Package

ADUM242E0BRWZ uses a 16-lead RoHS-compliant RW-16 wide-body SOIC package (SOIC_W), qualified for automotive applications and rated for operation up to +125°C ambient. The package provides reinforced insulation with minimum external creepage and clearance of 7.8 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM242D0BRWZ and SI8642ED-B-IS, the ADUM242E0BRWZ uniquely combines fail-safe low behavior, full IEC 60601-1 2 MOPP compliance, and iCoupler® transformer-based dc correctness-making it the only option for safety-critical medical power control and certified industrial shutdown circuits.

Availability

ADUM242E0BRWZ is available at Aetrix Electronics and suitable for industrial motor drives, isolated data acquisition systems, and medical imaging power supplies requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADUM242E0BRWZ 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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The ADUM242E0BRWZ belongs to the ADuM24xxE family of reinforced-isolation digital isolators designed specifically for safety-critical, high-noise applications demanding certified 5.0 kV_rms insulation and fail-safe operation.

FAQ

What is the fail-safe behavior of ADUM242E0BRWZ?

The ADUM242E0BRWZ defaults its outputs to logic low when VDD1 is unpowered or inputs are disabled. This fail-safe low state ensures downstream circuitry-such as gate drivers or safety relays-enters a known safe condition during primary-side power loss. Unlike ADUM242D0BRWZ (fail-safe high), this behavior is fixed and cannot be configured via pins or registers. The ADUM242E0BRWZ maintains this behavior across all operating voltages (1.8 V–5 V) and temperatures (−40°C to +125°C).

Does ADUM242E0BRWZ support 1.8 V logic on both sides?

Yes, ADUM242E0BRWZ supports independent 1.8 V to 5 V operation on VDD1 and VDD2. At 1.8 V, it guarantees 150 Mbps data rate with ≤15 ns propagation delay and maintains full common-mode transient immunity (100 kV/µs). Input thresholds scale to 0.7×VDDx and 0.3×VDDx, ensuring reliable interfacing with 1.8 V CMOS logic without level shifters. The ADUM242E0BRWZ also retains UVLO protection (1.6 V turn-on) and fail-safe functionality at 1.8 V.

What safety certifications does ADUM242E0BRWZ hold?

ADUM242E0BRWZ is certified to UL 1577 (5000 V_rms), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (2 MOPP), IEC/CSA 61010-1, CQC GB4943.1, and DIN EN IEC 60747-17 (VDE 0884-17). It achieves reinforced insulation with VIORM = 849 V_peak and meets creepage/clearance requirements (7.8 mm) for pollution degree 2. These certifications are validated for the RW-16 SOIC_W package and apply directly to the ADUM242E0BRWZ part number.

How does ADUM242E0BRWZ differ from ADUM240E0BRWZ?

ADUM242E0BRWZ provides two forward and two reverse channels (A/B forward, C/D reverse), whereas ADUM240E0BRWZ has all four channels unidirectional (forward only). This makes ADUM242E0BRWZ suitable for bidirectional protocols like SPI (SCLK/MOSI forward, MISO/CS reverse), while ADUM240E0BRWZ requires additional isolators for return paths. Both share identical isolation rating, speed, and package-but channel directionality is fixed per part number and not configurable. The ADUM242E0BRWZ pinout is not compatible with ADUM240E0BRWZ.

Can ADUM242E0BRWZ replace optocouplers in existing designs?

Yes, ADUM242E0BRWZ can replace discrete optocoupler solutions in most cases-offering superior speed (150 Mbps vs. typical 10 Mbps), lower power (quiescent current as low as 1.6 mA per side), tighter timing (≤3 ns channel matching), and no LED aging or temperature drift. However, direct drop-in replacement requires verifying pin compatibility (RW-16 SOIC matches standard 16-pin SOIC footprints) and confirming that fail-safe low behavior aligns with system safety requirements. The ADUM242E0BRWZ eliminates the need for external base resistors, pull-ups, or refresh clocks required by optocouplers.