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Home > Products > Isolators > Digital Isolators

Analog Devices Inc. ADUM321N0BRZ-RL7

Name: ADUM321N0BRZ-RL7
Brand: Analog Devices Inc.
SKU: ADUM321N0BRZ-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADUM321N0BRZ-RL7

Manufacturer:: Analog Devices Inc.

Category:: Digital Isolators

Package:: 8-SOIC (0.154", 3.90mm Width)

Datasheet:: ADUM321N0BRZ-RL7.pdf

Description:: IC, ROBUST DUAL ISO 2:1

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Product details

Overview

ADuM321N0BRZ-RL7 from Analog Devices is a dual-channel, reinforced digital isolator with 5.7 kV_RMS isolation rating, 150 Mbps data rate, and fail-safe low (N0) output configuration. It operates from 2.25 V to 5.5 V on both sides, supports level translation, and delivers 6.2 ns typical propagation delay at 5 V - enabling high-speed signal isolation in motor drives and industrial power converters.

For engineers reviewing the ADuM321N0BRZ-RL7 datasheet, ADuM321N0BRZ-RL7 pinout, ADuM321N0BRZ-RL7 application, or ADuM321N0BRZ-RL7 equivalent, key selection criteria include its SOIC_N (R-8) package, 636 V_PEAK VIORM rating, ±8 kV IEC 61000-4-2 ESD across barrier, AEC-Q100 qualification, and guaranteed 10 ns max propagation delay at 5 V operation.

Technical Context

The ADuM321N0BRZ-RL7 implements iCoupler® technology using monolithic air-core transformers for galvanic isolation between two independent CMOS channels. Its dual-channel architecture supports bidirectional or unidirectional signal routing with hard-matched channel timing (≤3.0 ns skew) and deterministic jitter under 96 ps at 100 Mbps.

It features dual independent supply domains (VDD1/VDD2), undervoltage lockout (2.0 V rising threshold), and failsafe logic-low outputs when input power is absent. The device meets DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation requirements for SOIC_N packaging with 3.5 mm creepage/clearance.

Key Specifications

Parameter	Value and Actual Design Meaning
Isolation Rating	5.7 kV_RMS for 1 minute (SOIC_N); VIORM = 636 V_PEAK - enables use in 600 V_RMS mains-connected systems per IEC 60664-1 Overvoltage Category II.
Data Rate	150 Mbps maximum (guaranteed) - supports high-speed PWM feedback and serial communication in servo drives and DC-DC controllers.
Propagation Delay	6.2 ns typical, ≤10 ns max at 5 V - ensures tight timing control in closed-loop power stage gate drive circuits.
Common-Mode Transient Immunity	180 kV/µs typical - maintains signal integrity during fast-switching events in inverters and motor drives.
Supply Voltage Range	2.25 V to 5.5 V on both sides - allows interoperability between 3.3 V microcontrollers and 5 V analog front-ends or gate drivers.
ESD Protection	±8 kV IEC 61000-4-2 across isolation barrier - protects against system-level ESD events without external TVS diodes.
Operating Temperature	−40°C to +125°C - qualified for under-hood automotive and industrial ambient environments.
Fail-Safe Output	N0 configuration: outputs default to logic low during input-side power loss - prevents unintended activation of downstream MOSFETs or IGBTs.

Pinout & Package

ADuM321N0BRZ-RL7 uses an 8-lead narrow-body SOIC_N (R-8) package with gull-wing leads, 1.27 mm pitch, and 3.5 mm minimum creepage/clearance. Pin 1 is marked with a dot; the package is RoHS-compliant and halogen-free.

Pin/Terminal	Circuit Role	Design Meaning
Pin 1	VDD1 (Input-Side Supply)	Power for Channel A input logic and transformer driver; must be decoupled locally.
Pin 2	GND1 (Input-Side Ground)	Reference for input-side signals and VDD1 return; separate from GND2 to maintain isolation.
Pin 3	INA (Channel A Input)	CMOS-compatible digital input; accepts 2.25–5.5 V logic levels with hysteresis.
Pin 4	GNDA (Input-Side Isolation Barrier Return)	Internal reference node for primary-side transformer coupling; not connected externally.
Pin 5	GNDB (Output-Side Isolation Barrier Return)	Internal reference node for secondary-side transformer coupling; not connected externally.
Pin 6	OUTA (Channel A Output)	CMOS output with rail-to-rail swing; N0 variant asserts logic low during VDD1 loss.
Pin 7	GND2 (Output-Side Ground)	Reference for output-side signals and VDD2 return; galvanically isolated from GND1.
Pin 8	VDD2 (Output-Side Supply)	Power for Channel A output logic and receiver; supports independent voltage translation.

Key Features

Feature	Design Value
Reinforced Isolation	VIORM = 636 V_PEAK, certified to DIN EN IEC 60747-17 - eliminates need for external isolation components in safety-critical subsystems.
Low Propagation Skew	≤3.0 ns channel matching (codirectional) - enables precise timing alignment in dual-signal applications like complementary PWM.
Low Dynamic Power	<1.65 mA/channel at 1 Mbps (5 V) - reduces thermal load in space-constrained industrial modules.
AEC-Q100 Qualified	Grade 1 (−40°C to +125°C) - validated for automotive powertrain and charging systems requiring long-term reliability.
Level Translation	2.25–5.5 V on both sides - bridges 1.8 V/3.3 V microcontrollers to 5 V gate drivers without external level shifters.
Robust ESD	±8 kV contact discharge across barrier - withstands handling and system-level transients without latch-up or degradation.

Applications

Motor Drive Feedback Isolation	PWM Controller Interface
Use Scenario: Isolating current-sense amplifier outputs and encoder signals in three-phase inverter stacks. IC Role / Device Role / Timing Role: Dual-channel isolator transmitting analog-to-digital converter data and position feedback while blocking ground loops and noise. Use Value: Enables accurate real-time current monitoring at 150 Mbps with <10 ns timing uncertainty, critical for field-oriented control algorithms.	Use Scenario: Coupling PWM signals from a 3.3 V MCU to high-voltage half-bridge gate drivers in DC-DC converters. IC Role / Device Role / Timing Role: Level-translating, high-speed digital isolator delivering matched timing for upper/lower gate drive signals. Use Value: Maintains <3 ns channel-to-channel skew across temperature, preventing shoot-through in synchronous rectifiers.
Industrial Fieldbus Node	Automotive Onboard Charger
Use Scenario: Isolating RS-485 or CAN FD transceiver data lines in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Galvanically separating communication PHY from host processor while preserving signal integrity up to 100 Mbps. Use Value: Provides 180 kV/µs CMTI margin to reject noise from adjacent 400 V DC bus switching, ensuring error-free Modbus RTU transmission.	Use Scenario: Isolating digital control signals between the AC/DC frontend controller and DC/DC stage in 11 kW OBC units. IC Role / Device Role / Timing Role: Fail-safe N0 isolator protecting secondary-side gate drivers during primary-side brownout conditions. Use Value: Prevents unsafe high-side FET turn-on during input power interruption - directly supporting ISO 26262 ASIL-B functional safety goals.

Motor Drive Feedback Isolation

PWM Controller Interface

Use Scenario: Isolating current-sense amplifier outputs and encoder signals in three-phase inverter stacks.

IC Role / Device Role / Timing Role: Dual-channel isolator transmitting analog-to-digital converter data and position feedback while blocking ground loops and noise.

Use Value: Enables accurate real-time current monitoring at 150 Mbps with <10 ns timing uncertainty, critical for field-oriented control algorithms.

Use Scenario: Coupling PWM signals from a 3.3 V MCU to high-voltage half-bridge gate drivers in DC-DC converters.

IC Role / Device Role / Timing Role: Level-translating, high-speed digital isolator delivering matched timing for upper/lower gate drive signals.

Use Value: Maintains <3 ns channel-to-channel skew across temperature, preventing shoot-through in synchronous rectifiers.

Industrial Fieldbus Node

Automotive Onboard Charger

Use Scenario: Isolating RS-485 or CAN FD transceiver data lines in programmable logic controller (PLC) I/O modules.

IC Role / Device Role / Timing Role: Galvanically separating communication PHY from host processor while preserving signal integrity up to 100 Mbps.

Use Value: Provides 180 kV/µs CMTI margin to reject noise from adjacent 400 V DC bus switching, ensuring error-free Modbus RTU transmission.

Use Scenario: Isolating digital control signals between the AC/DC frontend controller and DC/DC stage in 11 kW OBC units.

IC Role / Device Role / Timing Role: Fail-safe N0 isolator protecting secondary-side gate drivers during primary-side brownout conditions.

Use Value: Prevents unsafe high-side FET turn-on during input power interruption - directly supporting ISO 26262 ASIL-B functional safety goals.

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
ADuM320N0BRZ-RL7	Same SOIC_N package, identical pinout, but asymmetric quiescent current (IDD1(Q) = 0.41 mA, IDD2(Q) = 0.84 mA at N0 state)	Optimized for unidirectional signal flow where side-1 drives side-2; less suitable for bidirectional protocols	Select when minimizing input-side standby power is prioritized over output-side symmetry.
SI8620ED-B-IS	Capacitive isolation; 5 kV_RMS rating; 150 Mbps; SOIC-8; VIORM = 600 V_PEAK; no AEC-Q100 qualification	Lacks automotive qualification and failsafe N0 behavior; lower CMTI (75 kV/µs typical)	Acceptable for cost-sensitive industrial automation where AEC-Q100 and ultra-high CMTI are not required.

Compared with ADuM321N0BRZ-RL7, ADuM320N0BRZ-RL7 offers lower input-side quiescent current but higher output-side current in fail-safe mode, while SI8620ED-B-IS provides capacitive-isolation cost savings at the expense of automotive compliance and noise immunity.

Availability

ADuM321N0BRZ-RL7 is available at Aetrix Electronics and suitable for motor drives, onboard chargers, and industrial fieldbus nodes requiring stable component supply, long-term lifecycle support, and AEC-Q100-qualified isolation performance.

Supply support for ADuM321N0BRZ-RL7 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 ADuM321N series belongs to Analog Devices' iCoupler® digital isolator product line, designed specifically for high-reliability, high-speed galvanic isolation in safety-critical power conversion and control systems.

FAQ

What is the isolation voltage rating of the ADuM321N0BRZ-RL7?

The ADuM321N0BRZ-RL7 has a 5.7 kV_RMS isolation rating for 1 minute per UL 1577, with a maximum repetitive peak isolation voltage (VIORM) of 636 V_PEAK in its SOIC_N (R-8) package. This meets reinforced insulation requirements per DIN EN IEC 60747-17 and supports use in 600 V_RMS mains-connected equipment.

Does the ADuM321N0BRZ-RL7 support level translation between different supply voltages?

Yes, the ADuM321N0BRZ-RL7 supports independent 2.25 V to 5.5 V supplies on each side, enabling seamless level translation - for example, interfacing a 3.3 V microcontroller (VDD1) to a 5 V gate driver (VDD2) without external level-shifting circuitry.

What does the "N0" suffix indicate in ADuM321N0BRZ-RL7?

"N0" denotes the fail-safe output configuration: when the input-side supply (VDD1) is absent or below UVLO threshold, both output channels default to logic low. This prevents unintended activation of downstream power switches in fault conditions.

Is the ADuM321N0BRZ-RL7 qualified for automotive applications?

Yes, the ADuM321N0BRZ-RL7 is AEC-Q100 qualified (Grade 1, −40°C to +125°C), making it suitable for automotive powertrain, battery management, and onboard charger applications where extended temperature operation and long-term reliability are mandatory.

What is the maximum guaranteed data rate for the ADuM321N0BRZ-RL7?

The ADuM321N0BRZ-RL7 guarantees a maximum data rate of 150 Mbps under specified operating conditions (5 V supplies, CL = 15 pF), with pulse width distortion maintained within limits to ensure reliable high-speed digital signal transmission.

ADUM321N0BRZ-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: -

Package/Case:: 8-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Capacitive Coupling

Type:: General Purpose

Isolated Power:: Yes

Number of Channels:: 2

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

Channel Type:: Unidirectional

Voltage - Isolation:: 5700Vrms

Common Mode Transient Immunity (Min):: 100kV/µs

Data Rate:: 150Mbps

Propagation Delay tpLH / tpHL (Max):: 10ns, 10ns

Pulse Width Distortion (Max):: 3ns

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

Voltage - Supply:: 2.25V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 8-SOIC

ADUM321N0BRZ-RL7 FAQ

1.How can I place an order for ADUM321N0BRZ-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADUM321N0BRZ-RL7 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 ADUM321N0BRZ-RL7 reliable?

The price and inventory of ADUM321N0BRZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM321N0BRZ-RL7 is usually 5 days.

3.What payment methods are accepted for ADUM321N0BRZ-RL7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM321N0BRZ-RL7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ADUM321N0BRZ-RL7?

ADUM321N0BRZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADUM321N0BRZ-RL7 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 ADUM321N0BRZ-RL7?

For technical support, including ADUM321N0BRZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM321N0BRZ-RL7 requirements.

6.How does Aetrix verify that ADUM321N0BRZ-RL7 is sourced from the original manufacturer or authorized distributors?

All ADUM321N0BRZ-RL7 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 ADUM321N0BRZ-RL7 meets industry standards.

7.What is the process for return or replacement of ADUM321N0BRZ-RL7?

All ADUM321N0BRZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM321N0BRZ-RL7, 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 ADUM321N0BRZ-RL7 part is unused and in its original packaging.

Return procedure for ADUM321N0BRZ-RL7:

1.Submit a request within 90 days.

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

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