Analog Devices Inc. ADUM3301CRWZ-RL

Overview

ADUM3301CRWZ-RL from Analog Devices is a triple-channel, high-speed digital isolator based on iCoupler® transformer technology, delivering 90 Mbps data rate, 2 ns pulse width distortion, and bidirectional signal isolation across a reinforced 2500 V_rms barrier. It operates from 3.3 V or 5 V supplies on either side, supports level translation, and features output enable for bus management in industrial SPI and RS-485 interfaces.

For engineers reviewing the ADUM3301CRWZ-RL datasheet, ADUM3301CRWZ-RL pinout, ADUM3301CRWZ-RL application, or ADUM3301CRWZ-RL equivalent, key selection criteria include guaranteed 90 Mbps NRZ operation, <2 ns channel-to-channel matching at 105°C, 25 kV/µs common-mode transient immunity, and UL/VDE-certified 2500 V_rms isolation with 560 V_peak working voltage.

Technical Context

The ADUM3301CRWZ-RL implements three independent unidirectional isolation channels using monolithic air-core transformers and integrated CMOS interface circuitry. Its architecture eliminates optocoupler limitations-no current transfer ratio drift, no LED aging, and no external bias components required.

All channels support independent supply domains (VDD1/VDD2 = 3.0–5.5 V), enabling 3.3 V/5 V level translation. A patented refresh circuit ensures DC-correct output during idle periods and power transitions, while output enable (EN) allows tri-state control of all outputs simultaneously.

Key Specifications

Pinout & Package

ADUM3301CRWZ-RL is housed in a 16-lead SOIC wide-body (7.5 mm body width), RoHS-compliant package with creepage/clearance >8.3 mm, optimized for reinforced isolation and high-voltage reliability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM3301BRWZ-RL and SI8631BB-B-IS, ADUM3301CRWZ-RL uniquely combines 90 Mbps performance, medical-grade safety certifications (IEC 60601-1), and guaranteed DC correctness-making it optimal for high-speed, safety-critical industrial and medical isolation where timing precision and regulatory compliance are non-negotiable.

Availability

ADUM3301CRWZ-RL is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic equipment, motor drive controllers, and isolated data acquisition systems requiring stable component supply and long-term lifecycle assurance.

Supply support for ADUM3301CRWZ-RL 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 ADuM3300/ADuM3301 product line was designed specifically for robust, high-speed digital signal isolation in safety-critical and electrically noisy environments-emphasizing ESD-hardened system-level reliability and certified reinforced insulation.

FAQ

What is the maximum guaranteed data rate for ADUM3301CRWZ-RL?

The ADUM3301CRWZ-RL is specified for a maximum data rate of 90 Mbps under NRZ conditions with ≤2 ns pulse width distortion. This rating is guaranteed across the full operating temperature range (−40°C to +105°C) and supply voltages (3.0–5.5 V on either side), as verified in Table 1 of the Rev. F datasheet.

Does ADUM3301CRWZ-RL support level translation between 3.3 V and 5 V domains?

Yes, ADUM3301CRWZ-RL supports true bidirectional level translation: VDD1 and VDD2 can operate independently at 3.3 V or 5 V (3.0–5.5 V range each). Input thresholds adapt automatically (1.6 V/0.4 V for 3.3 V side; 2.0 V/0.8 V for 5 V side), and output swing tracks the local VDD, enabling seamless interfacing between mixed-voltage subsystems without external level shifters.

How does the refresh feature in ADUM3301CRWZ-RL ensure DC correctness?

The ADUM3301CRWZ-RL incorporates a patented internal refresh circuit that periodically samples the input state-even during static conditions-and retransmits it across the isolation barrier. This guarantees correct output logic levels during prolonged DC input states and through power-up/power-down transitions, eliminating output uncertainty inherent in basic capacitive or transformer-based isolators without refresh.

What safety certifications apply to ADUM3301CRWZ-RL?

ADUM3301CRWZ-RL carries UL 1577 (2500 V_rms/1 min), 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 certifications. These validate its suitability for reinforced insulation in industrial, medical, and test equipment applications requiring stringent creepage, clearance, and working voltage compliance.

Can ADUM3301CRWZ-RL replace ADUM3300CRWZ-RL in a design?

Yes, ADUM3301CRWZ-RL is a functional replacement for ADUM3300CRWZ-RL with identical pinout, package, and electrical specifications. The key difference is channel directionality: ADUM3301CRWZ-RL has all three channels configured input→output (INA→OUTA, INB→OUTB, INC→OUTC), whereas ADUM3300CRWZ-RL has two inputs and one output. Verify signal flow direction matches your schematic before substitution.