Analog Devices Inc. ADUM2401BRWZ

Overview

ADUM2401BRWZ from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based isolation technology, configured with three channels in one direction and one channel in the opposite direction (3/1 unidirectional split), rated for 10 Mbps data rate, 5000 V_rms isolation voltage, and operation across 2.7 V to 5.5 V supply rails on both sides. It enables bidirectional signal transfer with 3 V/5 V level translation in industrial motor drives and medical power supplies.

For engineers reviewing the ADUM2401BRWZ datasheet, ADUM2401BRWZ pinout, ADUM2401BRWZ application, or ADUM2401BRWZ equivalent, this page delivers verified specifications, SOIC-16W package details, functional channel configuration, safety certifications (UL, VDE, IEC), and real-world design context for high-noise, high-voltage system interfaces.

Technical Context

The ADUM2401BRWZ implements monolithic air-core transformer coupling per channel, eliminating LED-photodiode aging and CTR drift inherent in optocouplers. Its architecture supports independent 2.7–5.5 V supplies on each side, enabling true galvanic isolation with integrated level-shifting capability between mismatched logic domains.

It features a patented refresh circuit ensuring DC-correct output during static input conditions and power transitions, plus output enable control for bus sharing. Channel timing is characterized by ≤3 ns pulse width distortion and ≤6 ns opposing-directional channel-to-channel matching at 10 Mbps, critical for synchronized control signals in motor gate drivers.

Key Specifications

Pinout & Package

ADUM2401BRWZ is housed in a 16-lead SOIC wide-body package (RW-16) with 7.5 mm creepage and clearance, optimized for high-voltage PCB layouts. Pin numbering follows standard SOIC convention with Pin 1 marked by notch or dot.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8641BB-B-IS and ISO6741FDWR, ADUM2401BRWZ offers superior timing precision (≤3 ns PWD), proven transformer-based reliability in long-life medical systems, and native 3/1 channel assignment aligned with SPI bus topology-making it optimal for cost-sensitive, timing-critical industrial control designs.

Availability

ADUM2401BRWZ is available at Aetrix Electronics and suitable for motor drives, medical power supplies, and industrial PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and certified isolation performance.

Supply support for ADUM2401BRWZ 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 healthcare markets since 1965.

The ADuM240x family was designed specifically for high-reliability, multi-channel digital isolation in safety-critical systems where optocoupler limitations-aging, CTR variation, and temperature sensitivity-must be eliminated.

FAQ

What is the channel configuration of ADUM2401BRWZ?

ADUM2401BRWZ has a 3/1 unidirectional channel configuration: three channels (A–C) transmit from side 1 to side 2, and one channel (D) transmits from side 2 to side 1. This matches common SPI bus topologies and eliminates need for separate reverse-channel isolators. The ADUM2401BRWZ datasheet confirms this in the Functional Block Diagram (Figure 2) and Truth Table sections.

Does ADUM2401BRWZ support mixed 3 V and 5 V operation?

Yes, ADUM2401BRWZ supports mixed-supply operation: VDD1 and VDD2 may independently operate from 2.7 V to 5.5 V, enabling 5 V-to-3.3 V or 3.3 V-to-5 V level translation across the isolation barrier. Electrical Characteristics tables in the datasheet explicitly list performance for 5 V/3 V and 3 V/5 V configurations, confirming full functionality in both modes.

What safety certifications apply to ADUM2401BRWZ?

ADUM2401BRWZ holds UL 1577 (5000 V_rms/1 min), DIN EN IEC 60747-17 (VDE 0884-17), IEC/EN/CSA 62368-1, IEC/CSA 60601-1, and IEC/CSA 61010-1 certifications. These are documented in the Regulatory Information section of the ADuM2400/ADuM2401/ADuM2402 Rev. H datasheet, with VIORM = 645 V_peak and reinforced insulation rating.

How does the refresh feature work in ADUM2401BRWZ?

The ADUM2401BRWZ incorporates a patented internal refresh circuit that monitors input states and periodically retransmits static logic levels across the isolation barrier, ensuring DC correctness during prolonged input inactivity or power-up/power-down transitions. This eliminates the need for external refresh clocks or watchdog timers, and is detailed in the General Description and Application Information sections of the datasheet.

Can ADUM2401BRWZ replace optocouplers directly in existing designs?

ADUM2401BRWZ is not a drop-in optocoupler replacement due to differences in pinout, supply requirements (dual VDD), and active-high logic behavior. However, its SOIC-16W footprint allows direct PCB integration where space permits, and its 10 Mbps speed, low propagation skew, and 5000 V_rms rating make it a superior functional upgrade-provided layout accommodates dual supplies and OE control.