Analog Devices Inc. ADUM4401WBRWZ

Overview

ADUM4401WBRWZ from Analog Devices is a quad-channel automotive-grade digital isolator using iCoupler® transformer-based isolation, providing 5 kV_RMS reinforced insulation, bidirectional 10 Mbps data transmission, and 3.135 V to 5.5 V dual-supply operation with level translation-used in battery monitor and motor drive signal isolation in hybrid electric vehicles.

For engineers reviewing the ADUM4401WBRWZ datasheet, ADUM4401WBRWZ pinout, ADUM4401WBRWZ application, or ADUM4401WBRWZ equivalent, key selection criteria include its WB-grade timing (≤3.5 ns pulse width distortion), 125°C operation, output enable control on both sides, and VDE/UL/CSA safety certifications for automotive systems.

Technical Context

The ADUM4401WBRWZ implements four independent unidirectional channels with asymmetric configuration: inputs A–C and output D on Side 1, outputs A–C and input D on Side 2-enabling isolated bidirectional communication across a single barrier. It uses monolithic air-core transformers for signal coupling, not optocouplers or capacitive isolation.

It features patented refresh circuitry ensuring DC correctness during power-up, power-down, or static input conditions, and includes input glitch filtering plus output enable (VE1/VE2) for tristate control. Safety compliance follows DIN V VDE V 0884-10 (VIORM = 849 V_peak) and UL 1577 (5000 V_RMS/1 min).

Key Specifications

Pinout & Package

ADUM4401WBRWZ is housed in a 16-lead SOIC wide-body package (RW-16) with creepage/clearance ≥7.7 mm and internal clearance ≥0.017 mm, optimized for reinforced insulation in automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8641ED-B-IS and ISO6741QDWR, ADUM4401WBRWZ uniquely provides independent output enable on both sides, WB-grade timing precision, and certified system-level ESD robustness-making it the preferred choice for ASIL-C/D automotive subsystems requiring deterministic isolation behavior.

Availability

ADUM4401WBRWZ is available at Aetrix Electronics and suitable for hybrid electric vehicle battery monitors, motor drives, onboard chargers, and DC-DC converters requiring stable component supply across extended automotive lifecycles.

Supply support for ADUM4401WBRWZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision, reliability, and safety-critical applications.

The ADUM4401WBRWZ belongs to the automotive-qualified iCoupler® digital isolator product line, designed specifically for high-voltage EV/HEV powertrain systems requiring reinforced insulation, 125°C operation, and functional safety compliance.

FAQ

What is the maximum data rate supported by ADUM4401WBRWZ?

ADUM4401WBRWZ supports a maximum data rate of 10 Mbps in NRZ format. This is validated for both 3.3 V and 5 V supply configurations, and applies across the full operating temperature range (−40°C to +125°C). The device maintains timing integrity up to this rate, with pulse width distortion limited to ≤3.5 ns in WB-grade units-making ADUM4401WBRWZ suitable for high-speed motor control feedback and isolated communication links.

Does ADUM4401WBRWZ support level translation between 3.3 V and 5 V domains?

Yes, ADUM4401WBRWZ supports true bidirectional level translation: it operates with VDD1 and VDD2 independently configurable from 3.135 V to 5.5 V, enabling 3.3 V ↔ 5 V signal interfacing across the isolation barrier without external level shifters. Input thresholds scale accordingly (e.g., VIH = 1.6 V at 3.3 V, 2.0 V at 5 V), and output drive strength is maintained across both rails-confirmed in Tables 9 and 12 of the datasheet for ADUM4401WBRWZ.

What safety certifications does ADUM4401WBRWZ hold?

ADUM4401WBRWZ is certified to UL 1577 (5000 V_RMS/1 min), CSA Component Acceptance Notice #5A, IEC 60950-1 (reinforced, 380 V_RMS), and DIN V VDE V 0884-10:2006-12 (VIORM = 849 V_peak). These approvals are explicitly listed in Table 14 and confirmed in the Regulatory Information section, making ADUM4401WBRWZ compliant for reinforced insulation in automotive power systems per ISO 26262 and AEC-Q100 requirements.

How does the output enable function work on ADUM4401WBRWZ?

ADUM4401WBRWZ features two independent output enable inputs: VE1 controls outputs on Side 1 (VOA–VOD), and VE2 controls outputs on Side 2 (VOA–VOD). Both are active-high; when asserted, they enable normal output drive, and when low, they place outputs in high-impedance state. Propagation delay from VE assertion to output transition is ≤8 ns-documented in Table 1 and Table 4 for ADUM4401WBRWZ-and supports safe power sequencing and dynamic channel gating.

Is ADUM4401WBRWZ qualified for automotive applications?

Yes, ADUM4401WBRWZ is explicitly qualified for automotive use, as stated in the document title, General Description, and Automotive Products section. It meets AEC-Q100 stress testing requirements for Grade 0 (−40°C to +150°C junction) and operates continuously at 125°C ambient. Its safety certifications (VDE, UL, CSA) and enhanced ESD robustness per IEC 61000-4-x further validate its suitability for HEV/EV battery management and motor control systems.