Analog Devices Inc. ADUM131D1BRWZ

Overview

ADUM131D1BRWZ from Analog Devices is a triple-channel digital isolator based on iCoupler® transformer technology, providing reinforced galvanic isolation for high-noise industrial and medical systems. 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. It is used in isolated SPI interfaces for motor drives and PLC I/O modules.

For engineers reviewing the ADUM131D1BRWZ datasheet, ADUM131D1BRWZ pinout, ADUM131D1BRWZ application, or ADUM131D1BRWZ equivalent, key selection criteria include its 3.75 kV_RMS isolation rating (RW-16 SOIC_W package), fail-safe low output state, and compatibility with 1.8 V–5 V level translation across the barrier.

Technical Context

The ADUM131D1BRWZ implements three independent unidirectional isolation channels using monolithic air-core transformers, enabling dc-correct signal transmission without input toggling. Its architecture supports asymmetric voltage operation (e.g., 1.8 V side A / 3.3 V side B) and includes integrated undervoltage lockout (UVLO) with 1.5 V threshold hysteresis.

It features two enable inputs (VE1, VE2) controlling channel directionality and output disable, plus a DISABLE1 input that forces outputs into a defined fail-safe low state when asserted. Channel matching is ≤3.0 ns codirectional, ensuring tight timing alignment critical for synchronous serial protocols.

Key Specifications

Pinout & Package

RW-16 wide-body SOIC package (10.3 mm × 7.5 mm, 1.27 mm pitch), certified for 3.75 kV_RMS isolation with 7.8 mm creepage/clearance, suitable for reinforced insulation in medical (IEC 60601-1) and industrial safety applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8631BB-B-IS and ISO6731FDWR, ADUM131D1BRWZ uniquely combines 1.8 V–5 V bidirectional level translation, fail-safe low output, and 150 Mbps throughput in a single 3.75 kV_RMS SOIC_W package - making it optimal for resource-constrained, mixed-voltage industrial controllers requiring deterministic fault behavior.

Availability

ADUM131D1BRWZ is available at Aetrix Electronics and suitable for industrial motor control, medical patient monitoring, programmable logic controller I/O, and isolated data acquisition requiring stable component supply and long-term lifecycle assurance.

Supply support for ADUM131D1BRWZ 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 ADuM131D1BRWZ belongs to the iCoupler® digital isolator product line, engineered specifically for replacing optocouplers in high-reliability, high-speed, and safety-critical isolation applications where timing precision, low power, and long-term stability are essential.

FAQ

What is the maximum guaranteed data rate for ADUM131D1BRWZ?

The ADUM131D1BRWZ guarantees a maximum data rate of 150 Mbps under specified conditions (CL = 15 pF, CMOS levels). This is validated across the full operating temperature range (−40°C to +125°C) and supply voltages (1.8 V to 5 V). Higher rates may be achievable in specific layouts but are not production-tested or warranted. The 150 Mbps capability directly supports high-speed SPI clocking up to 75 MHz with dual-edge sampling.

Does ADUM131D1BRWZ support fail-safe operation, and how is it configured?

Yes, ADUM131D1BRWZ has a dedicated fail-safe low output mode. When the DISABLE1 pin is driven high, or when VDD2 is unpowered, all three outputs (YA, YB, YC) transition to and hold a logic low state. This behavior is intrinsic to the device architecture and requires no external components. It ensures predictable shutdown behavior in safety-critical applications such as motor emergency stop circuits or medical device isolation barriers.

What isolation certifications apply to ADUM131D1BRWZ?

ADUM131D1BRWZ in the RW-16 package is certified to UL 1577 (3750 V_RMS, 1 min), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (2 MOPP), and IEC/CSA 61010-1. It also meets DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 565 V_PEAK. These approvals are documented in Analog Devices' certification files E214100 (UL), 205078 (CSA), and 40051926 (VDE).

Can ADUM131D1BRWZ operate with different supply voltages on each side?

Yes, ADUM131D1BRWZ supports independent 1.8 V to 5 V supplies on VDD1 and VDD2. For example, it can translate signals from a 1.8 V microcontroller (VDD1 = 1.8 V) to a 3.3 V ADC interface (VDD2 = 3.3 V) without external level shifters. Input thresholds scale with local VDDx (VIH = 0.7×VDDx), and output drive strength adapts accordingly - enabling robust mixed-voltage system design.

How does the enable logic (VE1/VE2) control directionality in ADUM131D1BRWZ?

VE1 and VE2 are complementary enable inputs that configure the direction of all three channels simultaneously. When VE1 = HIGH and VE2 = LOW, signals flow from VA/VB/VC (side 1) to YA/YB/YC (side 2). When VE1 = LOW and VE2 = HIGH, flow reverses: YA/YB/YC become inputs and VA/VB/VC become outputs. This dual-enable scheme eliminates the need for external direction-control logic in bidirectional protocols like isolated I²C or half-duplex SPI.