Analog Devices Inc. ADUM3100BRZ

Overview

ADuM3100BRZ from Analog Devices is a single-channel digital isolator based on iCoupler® transformer technology, providing reinforced galvanic isolation for signal transmission across high-voltage barriers. It delivers 100 Mbps data rate at 5 V operation, <18 ns propagation delay, and operates from 3.0 V to 5.5 V supplies on both sides - enabling level translation between 3.3 V and 5 V systems in industrial fieldbus interfaces.

For engineers reviewing the ADuM3100BRZ datasheet, ADuM3100BRZ pinout, ADuM3100BRZ application, or ADuM3100BRZ equivalent, this page provides verified specifications, SOIC-8 package layout, system-level ESD reliability context per IEC 61000-4-x, and validated alternative options for optocoupler replacement in safety-critical digital isolation designs.

Technical Context

The ADuM3100BRZ implements monolithic air-core transformers with CMOS interface circuitry to achieve dc-correct signal transfer via patented refresh logic, eliminating optocoupler aging and duty-cycle dependency. Its dual-supply architecture supports independent 3.0–5.5 V operation on input (VDD1) and output (VDD2) sides, enabling bidirectional level shifting without external components.

It meets reinforced insulation requirements per DIN EN IEC 60747-17 (VDE 0884-17), with VIORM = 560 V peak and VISO = 2500 V rms for 1 minute, and achieves >25 kV/μs common-mode transient immunity - critical for motor drive control and PLC I/O modules exposed to fast-switching noise.

Key Specifications

Pinout & Package

ADuM3100BRZ is housed in an RoHS-compliant 8-lead SOIC package (SOIC_N, 150 mil width) with creepage/clearance ≥4 mm and reinforced insulation barrier between sides.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADuM3100ARZ and SI8600AC-B-IS, the ADuM3100BRZ uniquely combines 100 Mbps capability, VDE-reinforced certification, and exact pin compatibility with legacy optocoupler footprints - making it the only option that satisfies both high-speed and safety-critical requirements without layout changes.

Availability

ADuM3100BRZ is available at Aetrix Electronics and suitable for industrial automation, motor control, and medical instrumentation requiring stable component supply, long-term lifecycle assurance, and full regulatory documentation traceability.

Supply support for ADuM3100BRZ 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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and isolation applications.

The ADuM3100BRZ belongs to the iCoupler® digital isolator product line, engineered specifically to replace optocouplers in industrial, automotive, and medical systems demanding reliability, speed, and certified safety isolation.

FAQ

What is the maximum data rate supported by ADuM3100BRZ?

The ADuM3100BRZ supports up to 100 Mbps at 5 V operation with guaranteed pulse-width distortion ≤2 ns. This rating is confirmed in Table 1 of the Rev. E datasheet under "Maximum Data Rate" for the BR grade. At 3.3 V, the maximum data rate is 50 Mbps. The ADuM3100BRZ achieves this using high-speed transformer coupling and optimized CMOS drivers, unlike slower AR-grade variants.

Does ADuM3100BRZ support level translation between 3.3 V and 5 V domains?

Yes, ADuM3100BRZ supports mixed-supply operation: VDD1 can be 3.3 V while VDD2 is 5 V (or vice versa), enabling seamless level translation. Table 3 specifies electrical characteristics for both 5 V/3 V and 3 V/5 V configurations, including VOH/VOL thresholds and supply current values. This eliminates external level shifters in mixed-voltage system interfaces.

What safety certifications does ADuM3100BRZ hold?

ADuM3100BRZ is certified to UL 1577 (2500 V rms, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 560 V peak), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and CQC GB4943.1. These are explicitly listed in Table 5 and Table 6 of the datasheet, confirming suitability for safety-critical industrial and medical applications.

How does ADuM3100BRZ ensure DC correctness unlike optocouplers?

ADuM3100BRZ uses a patented refresh circuit that periodically samples and updates the output state during idle periods, ensuring the output remains accurate even with static input signals. This eliminates optocoupler output drift and duty-cycle dependency. The feature is described in the General Description section and verified in the Truth Table (Table 10), where VO returns to VI state within 1 μs after power restoration.

What is the common-mode transient immunity (CMTI) specification for ADuM3100BRZ?

ADuM3100BRZ guarantees >25 kV/μs common-mode transient immunity, tested per conditions in Table 1 and Table 2 (|CML|, |CMH|). This value is maintained across temperature and supply variations, and is critical for reliable operation in motor drives and inverters where fast dV/dt noise crosses the isolation barrier. The high CMTI stems from transformer-based coupling and balanced layout design.