Analog Devices Inc. ADUM231D0BRIZ-RL

Overview

ADUM231D0BRIZ-RL from Analog Devices is a triple-channel, 5.0 kV_RMS digital isolator based on iCoupler® technology, designed for high-noise industrial and medical interfaces. It delivers 150 Mbps data rate, 13 ns max propagation delay at 5 V, 100 kV/µs common-mode transient immunity, and operates across 1.8 V to 5 V supply rails with fail-safe high output configuration. It is used in SPI isolation for isolated ADC/DAC systems requiring reinforced insulation.

For engineers reviewing the ADUM231D0BRIZ-RL datasheet, ADUM231D0BRIZ-RL pinout, ADUM231D0BRIZ-RL application, or ADUM231D0BRIZ-RL equivalent, this page provides verified specifications, safety-rated package details, channel-level timing behavior, and validated alternatives for industrial fieldbus and medical data converter isolation designs.

Technical Context

The ADUM231D0BRIZ-RL implements three independent unidirectional CMOS-isolated channels using monolithic air-core transformers, enabling dc-correct operation without input transitions. Its architecture ensures tight channel matching (≤3.0 ns skew) and low pulse width distortion (≤3 ns), critical for synchronous serial protocols like SPI clock/data alignment.

It supports dual-supply operation (VDD1/VDD2 = 1.7–5.5 V), enabling level translation across the isolation barrier. Fail-safe logic high outputs activate when input power is absent or inputs are disabled - a key requirement for safety-critical monitoring paths in IEC 60601-1 and IEC 61010-1 systems.

Key Specifications

Pinout & Package

ADUM231D0BRIZ-RL uses a 16-lead, RoHS-compliant wide-body SOIC package (RW-16) with 8.3 mm creepage/clearance, rated for reinforced insulation and 5.0 kV_RMS withstand voltage.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM231D0BRIZ-RL, ADUM231D1BRIZ-RL offers identical performance except inverted fail-safe polarity, while SI8631BB-B-IS trades certified medical safety and superior noise immunity for lower unit cost in less demanding environments.

Availability

ADUM231D0BRIZ-RL is available at Aetrix Electronics and suitable for industrial PLC I/O modules, SPI-isolated data acquisition systems, medical patient monitors, and motor drive gate driver interfaces requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for ADUM231D0BRIZ-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 precision instrumentation, industrial automation, and healthcare markets.

The ADuM231D series belongs to Analog Devices' iCoupler® digital isolator product line, engineered specifically for reinforced insulation in safety-critical industrial and medical systems where reliability, timing accuracy, and regulatory compliance are non-negotiable.

FAQ

What is the fail-safe output behavior of ADUM231D0BRIZ-RL?

The ADUM231D0BRIZ-RL features a fail-safe high output configuration: when VDD1 is unpowered or the DISABLE1 pin is asserted, all three output channels (AOUT, BOUT, COUT) transition to and hold a logic high state. This behavior is confirmed in the Truth Tables section of the Rev. C datasheet and ensures predictable shutdown in safety-critical monitoring paths. The ADUM231D0BRIZ-RL does not require external pull-ups to enforce this state.

Does ADUM231D0BRIZ-RL support 1.8 V operation on both sides?

Yes, ADUM231D0BRIZ-RL supports independent 1.8 V operation on both VDD1 and VDD2 supplies, with guaranteed 150 Mbps data rate and 15 ns maximum propagation delay. Electrical Characteristics tables for 1.8 V operation (Table 7) confirm full functionality across −40°C to +125°C, including VIH/VIL thresholds scaled to 0.7× and 0.3× VDDx. This enables direct interfacing with ultra-low-voltage MCUs without level-shifting circuitry.

What safety certifications apply to ADUM231D0BRIZ-RL?

ADUM231D0BRIZ-RL carries UL 1577 (5000 V_RMS, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (849 V_PEAK), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (2 MOPP), and IEC/CSA 61010-1 approvals. These are documented in Table 11 of the datasheet for the RW-16 package. Certification evidence includes VDE certificate No. 40051926 and CQC certificate No. CQC16001147385.

How does ADUM231D0BRIZ-RL differ from ADUM230D0BRIZ-RL?

ADUM231D0BRIZ-RL and ADUM230D0BRIZ-RL share identical isolation rating, speed, and package, but differ in channel directionality: ADUM231D0BRIZ-RL has all three channels unidirectional (input→output), while ADUM230D0BRIZ-RL has two channels bidirectional and one unidirectional. This makes ADUM231D0BRIZ-RL optimal for SPI isolation (SCLK/MOSI/MISO), whereas ADUM230D0BRIZ-RL suits UART or I²C with shared data lines.

What is the minimum creepage distance for ADUM231D0BRIZ-RL?

The ADUM231D0BRIZ-RL in the RW-16 package provides a minimum external creepage distance of 8.3 mm between input and output pins, measured along the package body surface. This value is specified in Table 9 (Insulation and Safety Related Specifications) and satisfies reinforced insulation requirements for pollution degree 2 and altitudes ≤2000 m per IEC 62368-1 and IEC 60601-1.