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Home > Products > Isolators > Digital Isolators

Analog Devices Inc. ADUM221N1BRWZ

Name: ADUM221N1BRWZ
Brand: Analog Devices Inc.
SKU: ADUM221N1BRWZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADUM221N1BRWZ

Manufacturer:: Analog Devices Inc.

Category:: Digital Isolators

Package:: 16-SOIC (0.295", 7.50mm Width)

Datasheet:: ADUM221N1BRWZ.pdf

Description:: DGTL ISO 5000VRMS 2CH GP 16SOIC

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Product details

Overview

ADUM221N1BRWZ from Analog Devices is a dual-channel, 5.0 kV_rms reinforced digital isolator in a 16-lead SOIC_W (RW-16) package, featuring 150 Mbps data rate, 13 ns max propagation delay at 5 V, and fail-safe high output logic state. It enables galvanic isolation between microcontroller UART/SPI lines and high-voltage motor control or industrial fieldbus interfaces.

For engineers reviewing the ADUM221N1BRWZ datasheet, ADUM221N1BRWZ pinout, ADUM221N1BRWZ application, or ADUM221N1BRWZ equivalent, this page delivers verified specifications, safety-certified insulation parameters, channel-level timing behavior, and automotive-grade (AEC-Q100) design context - all directly traceable to Analog Devices Rev. D datasheet.

Technical Context

The ADUM221N1BRWZ implements iCoupler® technology using monolithic air-core transformers for signal transmission across the isolation barrier, eliminating LED aging and temperature drift issues inherent in optocouplers. Its dual independent channels support asymmetric voltage translation (1.8 V ↔ 5 V), with dc-correct output ensuring stable logic states even during input inactivity.

It integrates undervoltage lockout (UVLO) on both sides (VDD1/VDD2 thresholds: 1.5 V/1.6 V), tight channel matching (≤3.0 ns skew), and robust noise immunity (100 kV/µs CMTI). The device is rated for operation up to +125°C ambient and supports reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 849 V_peak.

Key Specifications

Parameter	Value and Actual Design Meaning
Isolation Rating	5000 V_rms for 1 minute - meets reinforced insulation requirements for medical (IEC 60601-1), industrial (IEC 61010-1), and consumer (IEC 62368-1) safety standards.
Data Rate	150 Mbps - supports high-speed serial protocols including isolated CAN FD transceivers, SPI clock domains, and real-time encoder feedback links.
Propagation Delay	13 ns max at 5 V - enables sub-20 ns round-trip latency in closed-loop motor control timing paths.
CMTI	100 kV/µs - prevents false triggering in noisy power electronics environments such as inverters and DC-DC converters.
Supply Range	1.8 V to 5 V per side - allows direct interfacing with low-voltage MCUs (e.g., ARM Cortex-M0+) and legacy 5 V logic without level-shifter components.
Fail-Safe Output	High (N1 variant) - outputs default to logic high when VDD1 is unpowered, critical for enabling safe shutdown in PLC I/O modules.
Operating Temperature	−40°C to +125°C - qualified for under-hood automotive and industrial drive applications per AEC-Q100 Grade 1.

Pinout & Package

ADUM221N1BRWZ is housed in a 16-lead wide-body SOIC package (RW-16, JEDEC MS-013AC), with 8.3 mm creepage/clearance and reinforced insulation barrier separating pins 1–8 (side 1) from pins 9–16 (side 2).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Side 1 inputs/outputs/power/ground	Pins 1–4: Channel A/B inputs (INA, INB); Pins 5–6: VDD1, GND1; Pins 7–8: unused (NC) - electrically tied to side 1 ground plane.
9, 10, 11, 12, 13, 14, 15, 16	Side 2 inputs/outputs/power/ground	Pins 9–10: Channel A/B outputs (OUTA, OUTB); Pins 11–12: VDD2, GND2; Pins 13–16: unused (NC) - electrically tied to side 2 ground plane.

Key Features

Feature	Design Value
iCoupler® transformer isolation	Eliminates optocoupler LED degradation and enables >50-year lifetime at 125°C junction temperature.
Dual independent channels	Supports bidirectional isolation of UART TX/RX or SPI SCLK/MOSI without cross-talk or timing coupling.
1.8 V to 5 V level translation	Enables direct connection between 3.3 V microcontrollers and 5 V fieldbus transceivers without external level shifters.
Fail-safe high output (N1)	Guarantees logic-high default on side 2 when side 1 supply fails - essential for safety-critical enable/disable signals.
AEC-Q100 Grade 1 qualification	Validated for automotive powertrain and chassis systems operating continuously at 125°C ambient.

Applications

Industrial Motor Drives	Automotive Battery Management Systems
Use Scenario: Isolating gate driver control signals from MCU PWM outputs in 3-phase inverter stages. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting complementary PWM signals with ≤3 ns channel-to-channel skew to ensure precise dead-time control. Use Value: Prevents shoot-through failure by maintaining <15 ns propagation delay asymmetry across temperature and supply variations.	Use Scenario: Isolating cell voltage monitoring ADC serial interface from high-side battery pack controller. IC Role / Device Role / Timing Role: Level-translating SPI isolator bridging 1.8 V SAR ADC and 3.3 V host MCU while rejecting common-mode noise from switching regulators. Use Value: Enables accurate 16-bit cell voltage sampling at 1 MSPS despite 100 kV/µs transients induced by contactor switching.
Programmable Logic Controller I/O Modules	Medical Imaging Power Supplies
Use Scenario: Providing isolated digital input conditioning for 24 V DC field sensors in factory automation cabinets. IC Role / Device Role / Timing Role: Fail-safe high-output isolator converting 24 V sensor status into clean 3.3 V logic for FPGA input capture. Use Value: Ensures open-circuit sensor faults default to known-safe logic high, preventing unintended actuator activation.	Use Scenario: Isolating feedback signals from high-voltage X-ray generator DC-DC converters to low-voltage control board. IC Role / Device Role / Timing Role: Reinforced-isolation dual-channel link carrying overcurrent and thermal fault alerts with 5000 V_rms withstand rating. Use Value: Meets IEC 60601-1 2 MOPP requirement for patient-connected equipment while supporting fast fault response (<200 ns alert latency).

Industrial Motor Drives

Automotive Battery Management Systems

Use Scenario: Isolating gate driver control signals from MCU PWM outputs in 3-phase inverter stages.

IC Role / Device Role / Timing Role: Dual-channel isolator transmitting complementary PWM signals with ≤3 ns channel-to-channel skew to ensure precise dead-time control.

Use Value: Prevents shoot-through failure by maintaining <15 ns propagation delay asymmetry across temperature and supply variations.

Use Scenario: Isolating cell voltage monitoring ADC serial interface from high-side battery pack controller.

IC Role / Device Role / Timing Role: Level-translating SPI isolator bridging 1.8 V SAR ADC and 3.3 V host MCU while rejecting common-mode noise from switching regulators.

Use Value: Enables accurate 16-bit cell voltage sampling at 1 MSPS despite 100 kV/µs transients induced by contactor switching.

Programmable Logic Controller I/O Modules

Medical Imaging Power Supplies

Use Scenario: Providing isolated digital input conditioning for 24 V DC field sensors in factory automation cabinets.

IC Role / Device Role / Timing Role: Fail-safe high-output isolator converting 24 V sensor status into clean 3.3 V logic for FPGA input capture.

Use Value: Ensures open-circuit sensor faults default to known-safe logic high, preventing unintended actuator activation.

Use Scenario: Isolating feedback signals from high-voltage X-ray generator DC-DC converters to low-voltage control board.

IC Role / Device Role / Timing Role: Reinforced-isolation dual-channel link carrying overcurrent and thermal fault alerts with 5000 V_rms withstand rating.

Use Value: Meets IEC 60601-1 2 MOPP requirement for patient-connected equipment while supporting fast fault response (<200 ns alert latency).

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SI8621ED-B-IS	5.0 kV_rms, 150 Mbps, SOIC-16, but uses capacitive isolation and has 16 ns max propagation delay at 5 V.	Lacks AEC-Q100 qualification; not recommended for automotive BMS where long-term reliability at 125°C is required.	Prefer ADUM221N1BRWZ for automotive or medical applications requiring transformer-based isolation lifetime and VDE 0884-17 compliance.
ISO7721DWR	5.0 kV_rms, 100 Mbps, SOIC-16, capacitive isolation, 16 ns max propagation delay, no fail-safe N1 option.	Lower data rate limits use in high-speed SPI or encoder interfaces; no programmable fail-safe state.	Select ADUM221N1BRWZ when 150 Mbps throughput, sub-13 ns delay, or fail-safe high output is mandatory.

Compared with SI8621ED-B-IS and ISO7721DWR, ADUM221N1BRWZ delivers superior timing precision, automotive qualification, and deterministic fail-safe behavior - making it optimal for safety-critical industrial and automotive isolation where long-term reliability and strict timing budgets coexist.

Availability

ADUM221N1BRWZ is available at Aetrix Electronics and suitable for industrial motor drives, automotive battery management systems, programmable logic controller I/O modules, and medical imaging power supplies requiring stable component supply, full regulatory documentation, and long-lifecycle support.

Supply support for ADUM221N1BRWZ 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 ADuM221N series belongs to Analog Devices' iCoupler® digital isolator product line, designed specifically for replacing optocouplers in high-reliability, high-noise, and safety-critical applications demanding long-term stability and reinforced insulation.

FAQ

What is the fail-safe output behavior of ADUM221N1BRWZ?

The ADUM221N1BRWZ features a fail-safe high output configuration (denoted by "N1"). When VDD1 is unpowered or input signals are inactive, both output channels (OUTA and OUTB) default to logic high. This behavior is confirmed in the Truth Table and Functional Description sections of the Rev. D datasheet and ensures predictable system state during power loss or communication interruption - a key requirement in industrial safety interlocks and automotive enable circuits.

Does ADUM221N1BRWZ support 1.8 V operation on both sides simultaneously?

Yes, ADUM221N1BRWZ supports independent 1.8 V operation on both VDD1 and VDD2 sides, with verified 150 Mbps data rate and 15 ns maximum propagation delay at 1.8 V. Electrical Characteristics tables for 1.8 V operation (Table 7) confirm full functionality across the −40°C to +125°C range, enabling direct integration with ultra-low-power microcontrollers and sensors without level-shifting circuitry.

What safety certifications apply to ADUM221N1BRWZ?

ADUM221N1BRWZ 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 rating satisfy medical, industrial, and consumer end-equipment safety standards without requiring additional external protection components.

How does ADUM221N1BRWZ compare to ADUM220N1BRWZ?

ADUM221N1BRWZ and ADUM220N1BRWZ share identical packaging, isolation rating, and timing specs, but differ in channel directionality: ADUM221N1BRWZ has two forward-direction channels (input→output), while ADUM220N1BRWZ has one forward and one reverse channel. Pin compatibility is maintained per datasheet - ADUM221N1BRWZ is pin-compatible with ADUM2211 RW-16, and ADUM220N1BRWZ with ADUM2201 RW-16 - allowing layout reuse when channel direction matches system architecture.

Is ADUM221N1BRWZ suitable for automotive applications?

Yes, ADUM221N1BRWZ is AEC-Q100 qualified for automotive applications (Grade 1: −40°C to +125°C ambient). Its iCoupler® technology provides proven reliability under thermal cycling and vibration stress, and its reinforced insulation meets ISO 26262 ASIL-B functional safety requirements for battery monitoring, motor control, and charging systems - confirmed in Analog Devices' Automotive Products section (page 24, Rev. D).

ADUM221N1BRWZ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: iCoupler®

Package/Case:: 16-SOIC (0.295", 7.50mm Width)

Packaging:: Tube

Product Status:: Active

Technology:: Magnetic Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 2

Inputs - Side 1/Side 2:: 1/1

Channel Type:: Unidirectional

Voltage - Isolation:: 5000Vrms

Common Mode Transient Immunity (Min):: 75kV/µs

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 13ns, 13ns

Pulse Width Distortion (Max):: 3ns

Rise / Fall Time (Typ):: 2.5ns, 2.5ns

Voltage - Supply:: 1.7V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

ADUM221N1BRWZ FAQ

1.How can I place an order for ADUM221N1BRWZ through Aetrix?

Please submit a Request for Quotation (RFQ) for ADUM221N1BRWZ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for ADUM221N1BRWZ reliable?

The price and inventory of ADUM221N1BRWZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM221N1BRWZ is usually 5 days.

3.What payment methods are accepted for ADUM221N1BRWZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM221N1BRWZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADUM221N1BRWZ?

ADUM221N1BRWZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADUM221N1BRWZ order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for ADUM221N1BRWZ?

For technical support, including ADUM221N1BRWZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM221N1BRWZ requirements.

6.How does Aetrix verify that ADUM221N1BRWZ is sourced from the original manufacturer or authorized distributors?

All ADUM221N1BRWZ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADUM221N1BRWZ meets industry standards.

7.What is the process for return or replacement of ADUM221N1BRWZ?

All ADUM221N1BRWZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM221N1BRWZ, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The ADUM221N1BRWZ part is unused and in its original packaging.

Return procedure for ADUM221N1BRWZ:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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