Analog Devices Inc. ADUM120N0BRZ

Overview

ADUM120N0BRZ from Analog Devices is a 3.0 kV_rms, dual-channel digital isolator based on iCoupler® technology, providing galvanic isolation between two independent logic domains. It delivers 150 Mbps data rate, 13 ns max propagation delay at 5 V, and operates across 1.7–5.5 V supply ranges on both sides - enabling 1.8 V/3.3 V/5 V level translation in industrial fieldbus and motor control interfaces.

For engineers reviewing the ADUM120N0BRZ datasheet, ADUM120N0BRZ pinout, ADUM120N0BRZ application, or ADUM120N0BRZ equivalent, this device supports fail-safe low-output behavior, AEC-Q100 qualification for automotive use, high common-mode transient immunity (100 kV/µs), and reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 565 V_peak.

Technical Context

The ADUM120N0BRZ implements two independent unidirectional CMOS-isolated channels using monolithic air-core transformers, ensuring dc-correct output states without input transitions. Its architecture guarantees tight channel matching (≤3.0 ns skew) and low jitter (55 ps rms at 5 V), critical for timing-sensitive serial interfaces like SPI and RS-485 transceiver control.

It features dual-supply operation (VDD1/VDD2) with independent 1.7–5.5 V ranges, undervoltage lockout (UVLO) thresholds at 1.5 V/1.6 V, and fail-safe default-low outputs when VDD1 is unpowered - distinguishing it from ADUM121N variants with default-high behavior.

Key Specifications

Pinout & Package

ADUM120N0BRZ uses an 8-lead, RoHS-compliant SOIC package with creepage/clearance ≥4.0 mm and internal isolation barrier separating side 1 (pins 1–4) and side 2 (pins 5–8).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM120N0BRZ, ADUM1285ARZ trades isolation robustness and speed for lower cost in non-safety-critical roles, while SI8620ED-B-IS offers higher voltage rating but demands layout changes and lacks automotive qualification - making ADUM120N0BRZ optimal for AEC-Q100 and VDE-certified designs requiring pin compatibility with legacy ADuM1285 footprints.

Availability

ADUM120N0BRZ is available at Aetrix Electronics and suitable for industrial motor control, automotive battery management, and medical infusion pump designs requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.

Supply support for ADUM120N0BRZ 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 ADuM120N/ADuM121N family was designed specifically for high-reliability, high-speed digital isolation in safety-critical systems - emphasizing low propagation delay, fail-safe behavior, and regulatory compliance across automotive, medical, and industrial applications.

FAQ

What is the fail-safe behavior of ADUM120N0BRZ?

The ADUM120N0BRZ features a default-low fail-safe output: when VDD1 is unpowered or disabled, both VOA and VOB transition to logic low regardless of input states. This behavior is confirmed in the Truth Table (Table 15) and ensures predictable deactivation of downstream circuitry during power faults - a key requirement for functional safety in ADUM120N0BRZ-based systems.

Does ADUM120N0BRZ support level translation between different supply voltages?

Yes, ADUM120N0BRZ supports bidirectional level translation: VDD1 may operate from 1.7 V to 5.5 V independently of VDD2, which also ranges from 1.7 V to 5.5 V. This allows, for example, 1.8 V FPGA I/O on side 1 to safely interface with 5 V motor driver logic on side 2 - a capability explicitly verified in Electrical Characteristics tables for 1.8 V, 2.5 V, 3.3 V, and 5 V operation modes of ADUM120N0BRZ.

Is ADUM120N0BRZ pin-compatible with any legacy Analog Devices isolators?

Yes, ADUM120N0BRZ is explicitly pin-compatible with ADUM1285, as stated in the Features section and General Description. Both share identical SOIC-8 pinout (VDD1, VIA, VIB, GND1, GND2, VOB, VOA, VDD2), enabling direct replacement in existing designs without PCB modification - provided the 3.0 kV_rms rating and 150 Mbps performance of ADUM120N0BRZ meet system requirements.

What safety certifications does ADUM120N0BRZ hold?

ADUM120N0BRZ is certified to UL 1577 (3000 V_rms), IEC/CSA 62368-1, IEC/CSA 60601-1 (1 MOPP), IEC/CSA 61010-1, CQC GB4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 565 V_peak. These approvals are documented in Table 11 and the Regulatory Information section, confirming its suitability for reinforced insulation in medical, industrial, and automotive end equipment.

Can ADUM120N0BRZ operate reliably at 125°C ambient temperature?

Yes, ADUM120N0BRZ is specified for continuous operation from −40°C to +125°C ambient, and is AEC-Q100 qualified for automotive Grade 1 applications. Its thermal resistance (θ_JA = 80°C/W) and safety limiting values (e.g., T_S = 150°C max junction) are validated across this full range - enabling deployment in engine bay ECUs, traction inverters, and other high-temperature environments where ADUM120N0BRZ maintains guaranteed timing and isolation performance.