Analog Devices Inc. ADUM3301BRWZ

Overview

ADUM3301BRWZ from Analog Devices is a triple-channel, bidirectional digital isolator based on iCoupler® transformer technology, delivering 10 Mbps data rate, 3 ns pulse width distortion, and 22 ns max propagation delay at 3.3 V/5 V operation. It enables level translation between 3.3 V and 5 V domains while maintaining high common-mode transient immunity (>25 kV/µs) for industrial I/O and SPI isolation.

For engineers reviewing the ADUM3301BRWZ datasheet, ADUM3301BRWZ pinout, ADUM3301BRWZ application, or ADUM3301BRWZ equivalent, this page provides verified specifications, SOIC-16W package details, functional differences versus ADUM3300BRWZ and ADUM3301CRWZ, and real-world use cases in isolated data acquisition and fieldbus interfaces.

Technical Context

The ADUM3301BRWZ implements three independent galvanic isolation channels using monolithic air-core transformers, supporting bidirectional signal flow per channel with integrated refresh logic to guarantee DC correctness during idle or power transitions. Its architecture eliminates optocoupler limitations such as CTR drift and temperature-dependent timing.

It operates across 3.0–5.5 V on both sides, enabling asymmetric supply configurations (e.g., 3.3 V primary / 5 V secondary), and features output enable control, precise channel-to-channel matching (≤6 ns opposing-directional skew), and robust ESD resilience per IEC 61000-4-x system-level testing.

Key Specifications

Pinout & Package

ADUM3301BRWZ is housed in a 16-lead SOIC wide-body (SOIC_W) RoHS-compliant package with 7.5 mm body width and 1.27 mm pitch, optimized for creepage/clearance compliance in reinforced isolation designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM3300BRWZ, ADUM3301BRWZ adds bidirectional capability on its third channel-critical for SPI MISO-and compared with ADUM3301CRWZ, it trades speed for lower dynamic power and higher system-level ESD margin, making it optimal for industrial control where reliability outweighs bandwidth.

Availability

ADUM3301BRWZ is available at Aetrix Electronics and suitable for industrial PLCs, isolated data acquisition systems, and RS-485 node designs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADUM3301BRWZ 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 since 1965.

The ADuM3300/ADuM3301 product line delivers reinforced galvanic isolation for industrial interfaces, emphasizing system-level reliability (IEC 61000-4-x), low power, and seamless voltage translation-designed specifically for harsh EMC environments.

FAQ

What is the maximum data rate supported by ADUM3301BRWZ?

ADUM3301BRWZ supports a maximum data rate of 10 Mbps, verified with ≤3 ns pulse width distortion and 20–50 ns propagation delay under load. This rating applies across 3.3 V and 5 V supply configurations and is guaranteed per the Rev. F datasheet Table 1 and Table 2 switching specifications for BRWZ grade devices.

Does ADUM3301BRWZ support level translation between 3.3 V and 5 V domains?

Yes, ADUM3301BRWZ supports true bidirectional level translation: VDD1 may be 3.3 V while VDD2 is 5 V (or vice versa), with logic thresholds automatically adapting (VIH = 1.6 V at 3.3 V side, 2.0 V at 5 V side). This eliminates external level shifters in mixed-voltage isolation barriers.

How does ADUM3301BRWZ ensure DC correctness during signal inactivity?

ADUM3301BRWZ incorporates a patented refresh circuit that periodically samples input states and retransmits them across the isolation barrier-even with no input transitions-ensuring output stability during power-up, power-down, or static logic conditions without external watchdog circuitry.

What safety certifications apply to ADUM3301BRWZ?

ADUM3301BRWZ is certified to UL 1577 (2500 V rms, 1 minute), DIN EN IEC 60747-17 (VDE 0884-17, VIORM = 560 V peak), IEC/EN/CSA 62368-1, IEC/CSA 60601-1, and IEC/CSA 61010-1, enabling use in medical, industrial, and test equipment requiring reinforced insulation.

Can ADUM3301BRWZ replace ADUM3300BRWZ on the same PCB?

No-ADUM3301BRWZ and ADUM3300BRWZ share the same SOIC-16W package and pinout but differ in channel directionality: ADUM3300BRWZ has two unidirectional and one unidirectional channel, while ADUM3301BRWZ has two unidirectional and one bidirectional channel. Pin compatibility exists, but functional replacement requires verification of signal direction requirements.