Analog Devices Inc. ADUM1301CRWZ

Overview

ADUM1301CRWZ from Analog Devices is a triple-channel digital isolator based on iCoupler® transformer technology, providing galvanic isolation between microcontroller SPI buses and high-voltage motor control subsystems. It delivers 90 Mbps data rate, <2 ns pulse width distortion, and 2 ns channel-to-channel matching at 125°C, enabling robust real-time feedback in industrial servo drives.

For engineers reviewing the ADUM1301CRWZ datasheet, ADUM1301CRWZ pinout, ADUM1301CRWZ application, or ADUM1301CRWZ equivalent, this page details its 3-channel bidirectional isolation architecture, 2.7–5.5 V dual-supply operation, output enable functionality, and compliance with UL 1577 (2500 Vrms), DIN EN IEC 60747-17 (VIORM = 560 Vpeak), and IEC/EN/CSA 62368-1.

Technical Context

The ADUM1301CRWZ implements three independent unidirectional or bidirectional isolation channels using monolithic air-core transformers, eliminating LED/photodiode aging and CTR drift inherent in optocouplers. Its patented refresh circuit ensures DC-correct output even during static input conditions or single-side power loss.

It supports asymmetric supply configurations (e.g., 5 V primary / 3 V secondary), enabling level translation across the isolation barrier. Propagation delay skew is limited to 10 ns (typ) and pulse width distortion to 0.5–2 ns (max), making it suitable for time-critical SPI clock/data synchronization and isolated gate driver interface timing.

Key Specifications

Pinout & Package

ADUM1301CRWZ is housed in a 16-lead SOIC wide-body package (7.5 mm body width, 10.3 mm length) with creepage/clearance ≥8.3 mm, optimized for reinforced isolation and high-voltage PCB layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8631BB-B-IS and ISO6731QDR, ADUM1301CRWZ uniquely combines 90 Mbps speed, 2.7–5.5 V dual-supply operation, and patented refresh for DC-correct outputs - making it the only option qualified for both high-speed industrial SPI and automotive BMS timing-critical isolation.

Availability

ADUM1301CRWZ is available at Aetrix Electronics and suitable for industrial motor drives, isolated data acquisition systems, and automotive battery management requiring stable component supply across extended temperature and regulatory-compliant isolation performance.

Supply support for ADUM1301CRWZ 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 ADuM1300/ADuM1301 family was designed specifically to replace optocouplers in multichannel isolation applications - delivering superior timing accuracy, lower power, and higher reliability using iCoupler® transformer technology.

FAQ

What is the maximum data rate supported by ADUM1301CRWZ?

ADUM1301CRWZ supports a maximum data rate of 90 Mbps (NRZ) with guaranteed pulse width distortion ≤2 ns. This rating is specified at 125°C and applies to all three channels simultaneously under loaded conditions (CL = 15 pF). The device achieves this performance using high-speed transformer-based signal coupling and advanced timing compensation circuits - enabling use in high-speed SPI, isolated USB, and real-time control interfaces where timing fidelity is critical. ADUM1301CRWZ maintains this rate across its full 2.7–5.5 V supply range.

Does ADUM1301CRWZ support level translation between different supply voltages?

Yes, ADUM1301CRWZ supports true bidirectional level translation: VDD1 and VDD2 may operate independently at 2.7–5.5 V each, enabling configurations such as 5 V MCU side to 3.3 V ADC side or vice versa. Input thresholds scale with supply (VIH = 2.0 V @ 5 V, 1.6 V @ 3 V), and output drive strength adapts accordingly (VOH = VDDx − 0.4 V @ 3.2 mA). This eliminates external level shifters in mixed-voltage systems - a key advantage over fixed-rail isolators. ADUM1301CRWZ maintains timing specs across all combinations.

What safety certifications does ADUM1301CRWZ hold?

ADUM1301CRWZ is certified to UL 1577 (2500 Vrms for 1 minute), DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 560 Vpeak, IEC/EN/CSA 62368-1, EN 60950-1, IEC/CSA 60601-1, IEC/CSA 61010-1, and CQC GB4943.1. These approvals validate its reinforced insulation capability for industrial, medical, and test equipment applications. The 8.3 mm creepage/clearance in the SOIC-W package meets IPC-2221 Class B requirements. ADUM1301CRWZ is not automotive AEC-Q100 qualified - that designation applies only to the ADUM1301W variant.

How does the refresh feature in ADUM1301CRWZ improve system reliability?

The patented refresh feature in ADUM1301CRWZ continuously monitors input states and retransmits static logic levels across the isolation barrier - ensuring outputs remain valid even when inputs are held constant for extended periods or when power is lost on one side. This prevents undefined or floating outputs that could trigger unintended actuation in motor control or safety interlocks. Unlike capacitive isolators lacking refresh, ADUM1301CRWZ guarantees DC correctness per IEC 61508 SIL-2 requirements - a critical capability for watchdog timers, fault signaling, and BMS cell monitoring where output stability directly impacts functional safety.

Can ADUM1301CRWZ be used in automotive applications?

ADUM1301CRWZ itself is not AEC-Q100 qualified and is intended for industrial and general-purpose applications. However, Analog Devices offers the pin-compatible ADUM1301W series (e.g., ADUM1301WCRWZ) which is qualified for automotive use (AEC-Q100 Grade 1, −40°C to +125°C) and meets additional requirements including HTOL, ESD, and board-level vibration testing. For non-automotive applications such as industrial inverters or medical equipment, ADUM1301CRWZ provides identical electrical performance with broader commercial temperature grading. Always verify qualification status via the official Analog Devices part number suffix before automotive deployment.