Analog Devices Inc. ADUM221N0BRWZ

Overview

ADUM221N0BRWZ from Analog Devices is a dual-channel, 5.0 kV_rms reinforced digital isolator in a 16-lead SOIC_W (RW-16) package, supporting 1.8 V to 5 V level translation across the isolation barrier, with 150 Mbps data rate and 13 ns max propagation delay at 5 V operation. It delivers fail-safe high output behavior and is AEC-Q100 qualified for automotive systems requiring robust noise immunity and high-temperature operation up to +125°C.

For engineers reviewing the ADUM221N0BRWZ datasheet, ADUM221N0BRWZ pinout, ADUM221N0BRWZ application, or ADUM221N0BRWZ equivalent, key selection criteria include its 100 kV/µs common-mode transient immunity, VIORM = 849 V_peak reinforced insulation rating per VDE 0884-17, and pin compatibility with ADuM2211 RW-16 for drop-in replacement in industrial field bus and medical isolation designs.

Technical Context

The ADUM221N0BRWZ implements iCoupler® technology using monolithic air-core transformers to replace optocouplers, ensuring dc-correct output without input transitions. Its two independent channels support asymmetric supply configurations (e.g., 1.8 V on side 1, 5 V on side 2), enabling bidirectional voltage translation while maintaining tight channel matching (≤3.0 ns).

It features integrated undervoltage lockout (UVLO) with 1.6 V turn-on and 1.5 V turn-off thresholds per side, plus fail-safe logic that forces outputs high when either VDD1 or VDD2 is unpowered. Safety compliance includes UL 1577, IEC/EN/CSA 62368-1, IEC 60601-1 (2 MOPP), and DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 849 V_peak.

Key Specifications

Pinout & Package

ADUM221N0BRWZ is housed in a 16-lead SOIC_W (RW-16) package with 7.8 mm minimum creepage/clearance, optimized for reinforced insulation in space-constrained PCB layouts. Pin 1–8 form the input-side domain (VDD1, GND1, INx); pins 9–16 form the output-side domain (VDD2, GND2, OUTx).

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADUM221N0BRWZ, ADUM2211BRWZ offers identical performance and layout compatibility but with inverted fail-safe behavior, while SI8621ED-B-IS provides comparable speed and isolation rating without automotive qualification or VDE-reinforced insulation evidence - making ADUM221N0BRWZ the only option meeting full IEC 60601-1 2 MOPP and AEC-Q100 Grade 1 requirements in this footprint.

Availability

ADUM221N0BRWZ is available at Aetrix Electronics and suitable for industrial motor drives, medical patient monitoring equipment, and automotive battery management systems requiring stable component supply with long-term lifecycle assurance.

Supply support for ADUM221N0BRWZ 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.

The ADuM221N series belongs to Analog Devices' iCoupler® digital isolator product line, engineered specifically for safety-critical, high-noise environments where reliability, regulatory compliance, and precise timing across isolation barriers are mandatory.

FAQ

What is the fail-safe output behavior of ADUM221N0BRWZ?

The ADUM221N0BRWZ is an N0 variant, meaning its outputs transition to a logic high state when either VDD1 or VDD2 is unpowered or inputs are disabled. This behavior is hardwired and ensures predictable shutdown in safety-critical systems. The ADUM221N0BRWZ does not require external pull-up resistors to enforce this state - it is implemented internally via dedicated bias circuitry.

Does ADUM221N0BRWZ support 1.8 V operation on both sides simultaneously?

Yes, ADUM221N0BRWZ supports 1.8 V operation on both VDD1 and VDD2 domains, with verified 150 Mbps data rate and 15 ns maximum propagation delay at 1.8 V. Input thresholds scale to 0.7 × VDDx and 0.3 × VDDx, ensuring robust noise margins even at lowest supply. The ADUM221N0BRWZ maintains full functionality across the entire 1.8 V to 5 V range on either side independently.

How does ADUM221N0BRWZ achieve 100 kV/µs common-mode transient immunity?

ADUM221N0BRWZ achieves 100 kV/µs CMTI through iCoupler® transformer-based architecture with tightly coupled, monolithic air-core windings and differential receiver design. Unlike optocouplers or capacitive isolators, this topology rejects fast common-mode edges without inducing glitches. The ADUM221N0BRWZ specification is measured per JEDEC JESD22-A118 with 800 V transient magnitude at 1000 V common-mode offset, confirming immunity in high-di/dt power systems.

Is ADUM221N0BRWZ pin-compatible with older ADuM2201 devices?

No, ADUM221N0BRWZ is not pin-compatible with ADuM2201. It is explicitly stated in the datasheet to be pin-compatible with ADuM2211 RW-16, not ADuM2201. While both use RW-16 packages, ADuM2201 has different channel configuration (input-only vs. input/output per side) and incompatible pin mapping. Replacing ADuM2201 with ADUM221N0BRWZ requires PCB redesign.

What safety certifications apply to ADUM221N0BRWZ?

ADUM221N0BRWZ carries UL 1577 (5000 V_rms), IEC/EN/CSA 62368-1, IEC/CSA 60601-1 (2 MOPP), IEC/CSA 61010-1, CQC GB 4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) certifications. Its VIORM = 849 V_peak and reinforced insulation classification are validated per VDE 0884-17 test Method B1 at 1592 V_peak, making ADUM221N0BRWZ suitable for Class I medical equipment and industrial safety systems.