Analog Devices Inc. ADUM231D1BRIZ

Overview

ADUM231D1BRIZ from Analog Devices is a triple-channel, 5.0 kV_RMS digital isolator using iCoupler® technology, designed for high-noise industrial interfaces. It delivers 150 Mbps data rate, 13 ns max propagation delay at 5 V, and supports 1.8 V to 5 V level translation across the isolation barrier. It is used in SPI isolation for motor drives where galvanic separation and timing integrity are critical.

For engineers reviewing the ADUM231D1BRIZ datasheet, ADUM231D1BRIZ pinout, ADUM231D1BRIZ application, or ADUM231D1BRIZ equivalent, this page provides verified specifications, fail-safe output behavior, safety certifications (UL 1577, VDE 0884-17), SOIC-16 package details, and real-world design context for industrial field bus and data converter isolation.

Technical Context

The ADUM231D1BRIZ implements three independent unidirectional channels with tight channel matching (≤3.0 ns skew) and guaranteed dc correctness-outputs retain last valid state during input power loss or signal absence. Its air-core transformer isolation architecture eliminates LED aging and temperature drift issues inherent in optocouplers.

It features dual fail-safe modes: outputs default to high when input-side power is absent or inputs are disabled. The device meets reinforced insulation requirements per IEC/EN/DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 849 V_PEAK, and operates across −40°C to +125°C with 100 kV/µs common-mode transient immunity.

Key Specifications

Pinout & Package

ADUM231D1BRIZ uses a 16-lead SOIC wide-body (RW-16) package with creepage and clearance ≥8.3 mm. Input-side pins (1–8) and output-side pins (9–16) are physically segregated to maintain reinforced insulation integrity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM231D1BRIZ, ADUM231D0BRIZ offers identical performance except output polarity during fault conditions, while SI8631BB-B-IS trades regulatory compliance and noise immunity for lower unit cost in less demanding environments.

Availability

ADUM231D1BRIZ is available at Aetrix Electronics and suitable for industrial motor control, medical sensor acquisition, and high-reliability field bus isolation requiring stable component supply, long-term lifecycle support, and full traceability.

Supply support for ADUM231D1BRIZ 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 industrial, automotive, communications, and healthcare markets since 1965.

The ADuM231x family targets high-noise industrial interfaces requiring certified reinforced isolation, low propagation delay, and multi-voltage interoperability - specifically engineered for SPI, encoder, and sensor signal isolation in harsh environments.

FAQ

What is the fail-safe behavior of ADUM231D1BRIZ?

The ADUM231D1BRIZ is configured for fail-high output: when VDD1 is unpowered or the DISABLE1 pin is asserted, outputs A2, B2, and C2 drive logic high. This behavior is hardwired per the D1 variant designation and ensures predictable state during power loss in safety-critical PLC I/O modules. ADUM231D1BRIZ does not support programmable fail-state selection.

Does ADUM231D1BRIZ support 1.8 V operation on both sides?

Yes, ADUM231D1BRIZ supports independent 1.8 V to 5.5 V operation on both VDD1 and VDD2 rails. At 1.8 V, it achieves 15 ns max propagation delay and 150 Mbps data rate, enabling direct interfacing with ultra-low-power microcontrollers and legacy 5 V peripherals without external level shifters - a key capability confirmed in Table 7 of the Rev. C datasheet.

What safety certifications apply to ADUM231D1BRIZ?

ADUM231D1BRIZ holds UL 1577 (5000 V_RMS), IEC/EN/DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (VIORM = 849 V_PEAK), IEC 60601-1 (2 MOPP), and IEC 61010-1 certifications. These are validated for the RW-16 SOIC package and documented in Tables 11 and 13 of the datasheet - no additional system-level derating is required for compliant use.

How does ADUM231D1BRIZ compare to optocouplers in timing performance?

ADUM231D1BRIZ delivers 13 ns max propagation delay and ≤3 ns channel matching - over 10× tighter than typical optocouplers (e.g., 100+ ns delay, >20 ns skew). Its iCoupler® architecture eliminates LED turn-on/turn-off delays and temperature-dependent drift, ensuring stable timing across −40°C to +125°C without calibration - a measurable advantage in closed-loop motor control using ADUM231D1BRIZ.

Can ADUM231D1BRIZ be used for bidirectional SPI isolation?

ADUM231D1BRIZ provides three unidirectional channels, so bidirectional SPI requires separate dedicated lines: one channel for SCLK, one for MOSI, and one for MISO. It does not support true bidirectional data lanes like some 2-channel isolators. However, its matched propagation delays (≤3 ns skew) and 150 Mbps capability ensure precise timing alignment across all three SPI signals - a verified implementation in isolated ADC reference designs using ADUM231D1BRIZ.