Analog Devices Inc. ADUM321N0BRIZ

Overview

ADuM321N0BRIZ from Analog Devices is a dual-channel, 5.7 kV_RMS reinforced digital isolator with fail-safe low (N0) output logic state, 150 Mbps guaranteed data rate, 6.2 ns typical propagation delay at 5 V, and 2.25–5.5 V dual-supply level translation. It serves as a high-speed signal isolator in gate driver feedback loops and isolated PWM interfaces for industrial inverters.

For engineers reviewing the ADuM321N0BRIZ datasheet, ADuM321N0BRIZ pinout, ADuM321N0BRIZ application, or ADuM321N0BRIZ equivalent, key selection criteria include its 180 kV/µs common-mode transient immunity, AEC-Q100 qualification, SOIC_N (R-8) package with 3000 V_RMS isolation, and fail-safe N0 behavior during input-side power loss.

Technical Context

The ADuM321N0BRIZ implements iCoupler® monolithic air-core transformer technology to achieve galvanic isolation without optocoupler aging or LED drive complexity. Its two independent unidirectional channels support asymmetric supply operation (e.g., 2.5 V on side 1, 5 V on side 2), enabling voltage-level translation across the barrier.

It features integrated undervoltage lockout (UVLO) on both sides with 2.2 V enable threshold and 60 µs recovery time, plus deterministic jitter ≤96 ps at 100 Mbps. The device meets DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation requirements with VIORM = 636 V_peak in the R-8 package.

Key Specifications

Pinout & Package

ADuM321N0BRIZ uses an 8-lead narrow-body SOIC (SOIC_N, R-8) package with creepage/clearance ≥3.5 mm and reinforced insulation per DIN EN IEC 60747-17. Pin 1 is marked with a dot; the package is RoHS-compliant and halogen-free.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADuM320N0BRIZ and SI8620ED-B-IS, the ADuM321N0BRIZ delivers superior common-mode noise immunity and built-in fail-safe logic without external components-critical for high-reliability motor control and automotive OBC applications where single-point failures must be avoided.

Availability

ADuM321N0BRIZ is available at Aetrix Electronics and suitable for industrial inverters, automotive onboard chargers, and isolated power supply monitoring requiring stable component supply and long-term lifecycle assurance.

Supply support for ADuM321N0BRIZ 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 precision instrumentation, industrial automation, and automotive markets since 1965.

The ADuM321N0BRIZ belongs to the ADuM32xxN family of reinforced digital isolators designed specifically for high-noise, safety-critical applications including IGBT/SiC gate driver interfaces and functional safety subsystems.

FAQ

What does the "N0" suffix mean in ADuM321N0BRIZ?

The "N0" suffix indicates that the ADuM321N0BRIZ has a fail-safe output configuration where both OUTA and OUTB default to logic low when the input-side supply (VDD1) is absent or drops below UVLO threshold. This behavior prevents unintended activation of downstream power switches in fault conditions, and is confirmed in Table 1 and the Functional Block Diagram of the ADuM320N/ADuM321N datasheet Rev. E.

Does ADuM321N0BRIZ support bidirectional communication?

No, ADuM321N0BRIZ provides two independent unidirectional channels (INA→OUTA and INB→OUTB). It does not support true bidirectional data transfer on a single pin pair. For bidirectional isolation, Analog Devices recommends the ADuM3220 or ADuM3221 series, which integrate separate transmit/receive paths per channel - a distinction explicitly stated in the General Description and Functional Block Diagram sections of the ADuM320N/ADuM321N datasheet.

What is the maximum data rate guaranteed for ADuM321N0BRIZ at 3.3 V operation?

The ADuM321N0BRIZ guarantees a maximum data rate of 100 Mbps at 3.3 V operation, as specified in Table 3 (Electrical Characteristics, 3.3 V Operation) of the datasheet Rev. E. This is lower than its 150 Mbps rating at 5 V due to reduced slew rate and timing margins at lower supply voltages, and applies under recommended operating conditions of 3.0–3.6 V and −40°C to +125°C.

Can ADuM321N0BRIZ be used in place of ADuM1201ARZ?

ADuM321N0BRIZ is not a direct replacement for ADuM1201ARZ due to differences in fail-safe behavior (N0 vs. default high), propagation delay (6.2 ns vs. 12 ns typical), and safety certifications (ADuM321N0BRIZ is AEC-Q100 qualified and meets VDE 0884-17; ADuM1201ARZ meets only UL 1577). While pin-compatible in SOIC-8, system-level validation is required before substitution - especially in automotive or safety-critical applications.

What isolation standard does ADuM321N0BRIZ meet for reinforced insulation?

ADuM321N0BRIZ meets DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation, with VIORM = 636 V_peak and VISO = 3000 V_RMS for 1 minute in the SOIC_N (R-8) package. This certification is explicitly listed in the Features and Insulation Specifications sections of the datasheet Rev. E and supports compliance with IEC 61800-5-1 and IEC 62109 for industrial and renewable energy systems.