Analog Devices Inc. ADUM140D1BRZ

Overview

ADUM140D1BRZ from Analog Devices is a quad-channel digital isolator based on iCoupler® technology, providing 3.0 kV_RMS galvanic isolation between two independent 1.8 V to 5 V logic domains. It delivers 150 Mbps guaranteed data rate, 13 ns max propagation delay at 5 V, and high common-mode transient immunity of 100 kV/µs - used in isolated SPI interfaces for industrial PLC I/O modules.

For engineers reviewing the ADUM140D1BRZ datasheet, ADUM140D1BRZ pinout, ADUM140D1BRZ application, or ADUM140D1BRZ equivalent, key selection criteria include its SOIC_N-16 package, fail-safe high output option, AEC-Q100 qualification, and compatibility with low-voltage microcontrollers in safety-critical motor control feedback paths.

Technical Context

The ADUM140D1BRZ implements four independent unidirectional CMOS-isolated channels using monolithic air-core transformers, ensuring dc-correct output states without input transitions. Its dual-supply architecture supports asymmetric voltage operation (e.g., 1.8 V side A / 3.3 V side B) and includes integrated undervoltage lockout (UVLO) with 1.6 V threshold on both sides.

It features programmable disable inputs per side and tristate-capable outputs, enabling bus sharing in multi-master SPI systems. The device meets DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation requirements with VIORM = 565 V_PEAK and certified to UL 1577, IEC/EN/CSA 60950-1, 60601-1, and 61010-1.

Key Specifications

Pinout & Package

ADUM140D1BRZ uses a RoHS-compliant 16-lead narrow-body SOIC (SOIC_N) package with 7.62 mm body width and 1.27 mm pitch. Creepage and clearance distances meet 4.0 mm minimum per IEC 60950-1 for pollution degree 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI8641ED-B-IS and ISO6741QDWR, ADUM140D1BRZ offers optimal balance of speed (150 Mbps), compact SOIC_N footprint, and automotive-grade reliability - making it ideal for space-constrained, high-throughput industrial and automotive control interfaces where 3.0 kV_RMS meets safety requirements.

Availability

ADUM140D1BRZ is available at Aetrix Electronics and suitable for industrial motor drives, medical patient monitors, automotive battery management systems, and isolated data acquisition requiring stable component supply and long-term lifecycle support.

Supply support for ADUM140D1BRZ 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 ADuM140x series was designed specifically for high-speed, low-power multichannel isolation in safety-critical systems where reliability, timing precision, and regulatory compliance are non-negotiable - especially in motor control, energy metering, and EV battery monitoring.

FAQ

What is the maximum guaranteed data rate for ADUM140D1BRZ?

The ADUM140D1BRZ guarantees a maximum data rate of 150 Mbps across all four channels under specified operating conditions (CL = 15 pF, CMOS levels). This is validated per Table 1–Table 4 in the Rev. K datasheet and applies to both 1.8 V and 5 V supply configurations. Higher rates may be achievable but are not production-tested or warranted. The ADUM140D1BRZ achieves this while maintaining pulse width distortion <3 ns and jitter <490 ps p-p at 5 V.

Does ADUM140D1BRZ support level translation between different supply voltages?

Yes, ADUM140D1BRZ supports true bidirectional level translation: VDD1 and VDD2 can operate independently from 1.8 V to 5 V, allowing interfaces such as 1.8 V FPGA to 3.3 V ADC or 5 V microcontroller to 2.5 V sensor. Input thresholds scale to 0.3×/0.7× respective VDD, and outputs swing rail-to-rail. This eliminates external level shifters in mixed-voltage systems - a core design feature confirmed in the General Description and Electrical Characteristics sections of the ADUM140D1BRZ datasheet.

What fail-safe behavior does ADUM140D1BRZ exhibit during power loss?

ADUM140D1BRZ is configured as a "fail-safe high" device: when either VDD1 or VDD2 is removed or falls below UVLO threshold (1.5 V), the corresponding outputs transition to and hold a logic high state. This is explicitly defined in the Ordering Guide and Functional Description for the "D1" variant (vs. "E1" which is fail-safe low). This behavior prevents undefined states in critical enable lines - for example, keeping an isolated gate driver enabled only when both sides are powered.

Is ADUM140D1BRZ pin-compatible with earlier ADuM1400-series isolators?

No, ADUM140D1BRZ is not pin-compatible with ADuM1400/ADuM1401/ADuM1402. While ADuM140E1/ADuM141E1/ADuM142E1 are stated as pin-compatible replacements, the "D1" suffix denotes a different pin function mapping - specifically, DIS1 and VE2 enable controls differ in placement and polarity. Pin configuration diagrams in Figures 20–22 of the Rev. K datasheet confirm distinct pinouts for D-series versus E-series variants within the same package.

What safety certifications apply to ADUM140D1BRZ?

ADUM140D1BRZ holds UL 1577 (3000 V_RMS for 1 min), IEC/EN/CSA 60950-1, IEC/CSA 60601-1, IEC/CSA 61010-1, CQC GB 4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) certifications. These are listed in the Features and Regulatory Information sections of the datasheet. Its VIORM = 565 V_PEAK and 4.0 mm creepage/clearance meet reinforced insulation requirements for medical, industrial, and automotive end equipment complying with IEC 61800-5-1 and ISO 26262 ASIL-B.