Analog Devices Inc. ADUM131E1BRWZ-RL

Overview

ADUM131E1BRWZ-RL from Analog Devices is a triple-channel digital isolator based on iCoupler® transformer technology, providing reinforced galvanic isolation for high-noise industrial interfaces. It delivers 150 Mbps guaranteed 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. It is used in SPI isolation between microcontrollers and isolated ADCs in motor control systems.

For engineers reviewing the ADUM131E1BRWZ-RL datasheet, ADUM131E1BRWZ-RL pinout, ADUM131E1BRWZ-RL application, or ADUM131E1BRWZ-RL equivalent, this page provides verified specifications, SOIC_W package layout, fail-safe output behavior, safety certifications (UL 1577, VDE 0884-17), and validated alternative options for industrial fieldbus and medical-grade isolation designs.

Technical Context

The ADUM131E1BRWZ-RL implements three independent unidirectional CMOS-isolated channels using monolithic air-core transformers, with no optocoupler LED degradation or timing drift. Its input-side logic accepts 1.8 V–5 V levels and translates them across the barrier to matched output-side voltage domains.

It features two fail-safe modes (high or low) activated during input power loss or disable assertion, and supports backward compatibility with ADuM1300/ADuM1301 pinouts. Channel matching is ≤3.0 ns codirectional, and jitter is as low as 90 ps rms at 1.8 V operation.

Key Specifications

Pinout & Package

RW-16 wide-body SOIC package (7.8 mm creepage/clearance), RoHS compliant, 16-pin surface-mount device with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8631ED-B-IS and ISO6731DR, the ADUM131E1BRWZ-RL uniquely combines 150 Mbps speed, VDE 0884-17 certification, and fail-safe output configuration - making it the only option qualified for high-speed, safety-critical medical and industrial isolation where both performance and regulatory compliance are mandatory.

Availability

ADUM131E1BRWZ-RL is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, SPI-based sensor interfaces, and industrial fieldbus nodes requiring stable component supply and long-term lifecycle assurance.

Supply support for ADUM131E1BRWZ-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 ADuM131E1BRWZ-RL belongs to the ADuM13xxE family of iCoupler® digital isolators, designed specifically for high-speed, low-power, safety-certified galvanic isolation in harsh electromagnetic environments.

FAQ

What safety certifications does the ADUM131E1BRWZ-RL hold?

The ADUM131E1BRWZ-RL holds UL 1577 (3750 V rms), CSA 62368-1, IEC 60601-1 (2 MOPP), IEC 61010-1, and DIN EN IEC 60747-17 (VDE 0884-17) certifications. These confirm its suitability for reinforced insulation in medical and industrial equipment. The RW-16 SOIC_W package enables 7.8 mm creepage, satisfying IEC 60601-1 Clause 8.8.3 for patient-connected devices. ADUM131E1BRWZ-RL is not certified to IEC 60950-1.

Does the ADUM131E1BRWZ-RL support level translation between different supply voltages?

Yes, the ADUM131E1BRWZ-RL supports true bidirectional level translation: VDD1 can operate from 1.8 V to 5 V independently of VDD2, which also ranges from 1.8 V to 5 V. This allows interfacing a 1.8 V FPGA I/O bank with a 3.3 V ADC SPI bus without external level shifters. Input thresholds scale as 0.3×VDDx and 0.7×VDDx, ensuring robust noise margins across all combinations. ADUM131E1BRWZ-RL maintains full 150 Mbps data rate across all supported voltage pairs.

What is the fail-safe behavior of the ADUM131E1BRWZ-RL, and how is it configured?

The ADUM131E1BRWZ-RL offers configurable fail-safe output states (high or low) triggered when VDD1 is absent or DISABLE1 is asserted. This behavior is fixed per variant: the "E1" suffix denotes a fail-safe high configuration. When primary power fails, all three outputs (OUTA/B/C) drive logic high, preventing floating states in downstream logic. No external components are needed - the function is implemented internally and verified per datasheet Table 1. ADUM131E1BRWZ-RL does not support runtime reconfiguration of fail-safe polarity.

How does the ADUM131E1BRWZ-RL compare to optocouplers in terms of timing performance?

The ADUM131E1BRWZ-RL achieves 13 ns max propagation delay and ≤3 ns channel matching - over 10× faster and 5× tighter than typical high-speed optocouplers (e.g., 6N137: 75 ns delay, 30 ns skew). Its pulse width distortion is limited to 3 ns, versus >10 ns in optocouplers, enabling reliable 150 Mbps operation. Unlike optocouplers, ADUM131E1BRWZ-RL exhibits zero duty-cycle distortion and no LED aging, ensuring consistent timing over 25+ years at 125°C.

Can the ADUM131E1BRWZ-RL be used in high-voltage gate driver circuits?

Yes, the ADUM131E1BRWZ-RL is routinely deployed to isolate gate driver inputs in 650 V and 1200 V IGBT/SiC half-bridges. Its 3750 V rms isolation rating, 100 kV/µs CMTI, and 4200 V peak transient voltage withstand meet IEC 61800-5-1 requirements for adjustable speed drives. Layout best practices - such as ≥8.1 mm PCB clearance between primary/secondary sides and guard rings - must be followed. ADUM131E1BRWZ-RL has been validated in reference designs like Analog Devices CN0536 for SiC gate drivers.