Analog Devices Inc. ADUM1100BR

Overview

ADUM1100BR 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 supports up to 100 Mbps data rate at 5 V operation, operates from 3.0 V to 5.5 V supplies, delivers <18 ns propagation delay, and is rated for −40°C to +105°C ambient temperature - ideal for industrial field bus interfaces requiring robust noise immunity and dc-correct output.

For engineers reviewing the ADUM1100BR datasheet, ADUM1100BR pinout, ADUM1100BR application, or ADUM1100BR equivalent, key selection criteria include its 100 Mbps capability (vs. 25 Mbps in AR grade), 560 V_PEAK reinforced insulation per VDE 0884-17, 8-lead SOIC_N package, and compatibility with mixed 3.3 V/5 V level translation in microprocessor system interfaces.

Technical Context

The ADUM1100BR implements monolithic air-core transformer coupling with integrated CMOS interface circuitry on both sides of the isolation barrier. Its patented refresh circuit ensures dc correctness without external components, eliminating optocoupler-like drift or duty-cycle dependency.

It features dual independent supply domains (VDD1/VDD2), enabling bidirectional level-shifting between 3.3 V and 5 V logic systems. The device achieves >25 kV/μs common-mode transient immunity via differential transformer signaling and internal shielding, meeting reinforced insulation requirements under DIN EN IEC 60747-17.

Key Specifications

Pinout & Package

ADUM1100BR is housed in an 8-lead SOIC_N (Small Outline Integrated Circuit, Narrow-body) package, RoHS-compliant, with creepage/clearance ≥4 mm and 41 mm² footprint. Pin 1 is marked with a dot or bevel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM1100AR and SI8610BB-B-IS, the ADUM1100BR uniquely combines 100 Mbps performance, −40°C to +105°C operation, VDE 0884-17 reinforced certification, and guaranteed dc correctness - making it the only option qualified for high-reliability industrial field bus and safety-critical microprocessor interface roles.

Availability

ADUM1100BR is available at Aetrix Electronics and suitable for industrial field bus isolation, optocoupler replacement, microprocessor system interface, and computer peripheral interface applications requiring stable component supply across multi-year production cycles.

Supply support for ADUM1100BR 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, headquartered in Wilmington, MA.

The ADuM1100 series belongs to Analog Devices' iCoupler® digital isolator product line, engineered specifically to replace optocouplers with higher speed, lower power, longer lifetime, and enhanced reliability in industrial, automotive, and medical isolation applications.

FAQ

What is the maximum data rate supported by the ADUM1100BR?

The ADUM1100BR supports a maximum data rate of 100 Mbps under 5 V operation with CMOS signal levels and 15 pF load. This is confirmed in Table 1 of the Rev. L datasheet for the BR grade. At 3.3 V operation, the maximum guaranteed rate is 50 Mbps. The device maintains <2 ns pulse width distortion up to this limit, ensuring reliable NRZ signal transmission in high-speed serial interfaces.

Does the ADUM1100BR require external components for dc correctness?

No, the ADUM1100BR does not require external components for dc correctness. It incorporates a patented internal refresh circuit that automatically updates the output state approximately every 1.2 Mbps, guaranteeing correct output logic level even during indefinite static input conditions. This feature is intrinsic to all ADuM1100 variants and eliminates the need for external watchdog timers or refresh pulses required by some competing isolators.

What safety certifications apply to the ADUM1100BR?

The ADUM1100BR 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, and IEC/CSA 61010-1. These approvals are explicitly listed in Tables 5 and 7 of the Rev. L datasheet and apply to the ADUM1100BR variant as part of the ADuM1100 family qualification.

Can the ADUM1100BR operate with different supply voltages on each side?

Yes, the ADUM1100BR supports mixed-supply operation: VDD1 may be 3.3 V while VDD2 is 5 V (or vice versa), enabling true level translation. Electrical specifications for 3 V/5 V and 5 V/3 V modes are fully characterized in Table 3 of the Rev. L datasheet, including propagation delay (13–26 ns), power consumption, and output drive strength - all guaranteed across the full operating temperature range.

What is the thermal operating limit of the ADUM1100BR?

The ADUM1100BR is rated for ambient operating temperatures from −40°C to +105°C, as specified in Table 8 (Recommended Operating Conditions) of the Rev. L datasheet. This 105°C maximum applies specifically to the BR grade; the UR grade extends to +125°C. The device's thermal derating curve (Figure 2) confirms safe operation up to 150°C case temperature under defined safety-limiting current conditions.