Analog Devices Inc. ADUM231E1BRWZ

Overview

ADUM231E1BRWZ 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.

For engineers reviewing the ADUM231E1BRWZ datasheet, ADUM231E1BRWZ pinout, ADUM231E1BRWZ application, or ADUM231E1BRWZ equivalent, key selection criteria include reinforced insulation rating (849 V_PEAK), SOIC-16 wide-body package with 8.3 mm creepage, channel matching ≤3.0 ns, and compatibility with 1.8 V–5 V level translation across the isolation barrier.

Technical Context

The ADUM231E1BRWZ implements three independent unidirectional isolation channels using monolithic air-core transformers and CMOS interface circuitry, enabling dc-correct operation without input transitions. Its architecture supports asymmetric supply configurations (e.g., 1.8 V on side 1, 5 V on side 2) and includes integrated undervoltage lockout (1.5 V/1.6 V thresholds) and tristate output enable control.

Unlike optocouplers, it guarantees deterministic logic state retention during power loss via fail-safe high output behavior, and meets reinforced insulation requirements per DIN EN IEC 60747-17 (VDE 0884-17), IEC 60601-1 (2 MOPP), and IEC 62368-1 - validated by 1592 V_PEAK partial discharge testing and 5000 V_RMS/1 min withstand voltage.

Key Specifications

Pinout & Package

ADUM231E1BRWZ is housed in a RoHS-compliant 16-lead SOIC wide-body package (RW-16) with 8.3 mm creepage and clearance, rated for reinforced insulation per VDE 0884-17 and UL 1577.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8631ED-B-IS and ISO6731RWR, ADUM231E1BRWZ offers superior timing precision (13 ns vs. 15/25 ns), higher noise immunity (100 vs. 75/30 kV/µs), and full 2 MOPP medical certification - making it the preferred choice for safety-critical, high-speed isolation where deterministic behavior and regulatory alignment are mandatory.

Availability

ADUM231E1BRWZ is available at Aetrix Electronics and suitable for industrial motor control, medical sensor acquisition, and programmable logic controller (PLC) I/O modules requiring stable component supply and long-term lifecycle support.

Supply support for ADUM231E1BRWZ 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 ADuM23x series is part of Analog Devices' iCoupler® digital isolator product line, engineered specifically for replacing optocouplers in safety-critical, high-noise, and high-reliability applications demanding reinforced insulation and precise timing.

FAQ

What is the maximum data rate supported by ADUM231E1BRWZ?

ADUM231E1BRWZ supports a guaranteed maximum data rate of 150 Mbps under specified conditions (CL = 15 pF, CMOS levels). This rating applies across its full operating temperature range (−40°C to +125°C) and supply voltage range (1.7 V to 5.5 V). Higher rates may be achievable in specific layouts but are not production-tested or guaranteed. The 150 Mbps capability makes ADUM231E1BRWZ suitable for high-speed SPI, digital encoder, and fast serial interface applications.

Does ADUM231E1BRWZ require external pull-up or pull-down resistors on its inputs or outputs?

No, ADUM231E1BRWZ does not require external pull-up or pull-down resistors. Its inputs accept standard CMOS logic thresholds (0.3×VDD1/0.7×VDD1) and exhibit low leakage (±10 µA). The VE2 enable pin has an internal pull-up (−3 µA typical), and outputs are actively driven with fail-safe high behavior. External resistors would compromise noise immunity and violate the certified creepage design of the RW-16 package.

How does the fail-safe high output configuration of ADUM231E1BRWZ behave during power loss?

When VDD1 is absent or inputs are disabled, ADUM231E1BRWZ forces all three outputs (OUTA, OUTB, OUTC) to logic high - a defined, predictable state that prevents floating nodes. This behavior is implemented via internal circuitry independent of VDD2, ensuring safe default signaling even if only the secondary side remains powered. This feature is critical in safety interlock and watchdog applications where "no signal" must equate to "enabled" or "safe."

Can ADUM231E1BRWZ operate with different supply voltages on each side (e.g., 1.8 V on side 1 and 5 V on side 2)?

Yes, ADUM231E1BRWZ supports independent supply voltages from 1.7 V to 5.5 V on VDD1 and VDD2, enabling true level translation across the isolation barrier. For example, it can accept 1.8 V logic inputs and deliver 5 V logic outputs - eliminating external level shifters in mixed-voltage systems such as battery-powered sensors interfacing with 5 V PLC backplanes. Input thresholds scale with VDD1; output levels follow VDD2.

What safety certifications apply to ADUM231E1BRWZ and how are they verified?

ADUM231E1BRWZ is certified to UL 1577 (5000 V_RMS/1 min), DIN EN IEC 60747-17 (VDE 0884-17) with 849 V_PEAK VIORM, IEC 60601-1 (2 MOPP), and IEC 62368-1. Each unit undergoes 100% production testing at ≥1592 V_PEAK with partial discharge detection <5 pC. Certification documentation is maintained by Analog Devices and available through authorized distributors. These approvals are tied to the RW-16 package construction and cannot be assumed for alternate packages.