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Home > Products > Isolators > Digital Isolators

Analog Devices Inc. ADUM3480BRSZ-RL7

Name: ADUM3480BRSZ-RL7
Brand: Analog Devices Inc.
SKU: ADUM3480BRSZ-RL7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: ADUM3480BRSZ-RL7

Manufacturer:: Analog Devices Inc.

Category:: Digital Isolators

Package:: 20-SSOP (0.209", 5.30mm Width)

Datasheet:: ADUM3480BRSZ-RL7.pdf

Description:: DGTL ISO 3750VRMS 4CH GP 20SSOP

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Product details

Overview

ADUM3480BRSZ-RL7 from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based technology, providing 3.75 kV_RMS reinforced isolation between two independent domains. It supports up to 25 Mbps NRZ data rate, features 25 ns typical propagation delay, operates across 1.8 V–5.5 V I/O and 3.0 V–5.5 V core supplies, and delivers >25 kV/µs common-mode transient immunity - enabling robust SPI isolation in industrial PLC I/O modules.

For engineers reviewing the ADUM3480BRSZ-RL7 datasheet, ADUM3480BRSZ-RL7 pinout, ADUM3480BRSZ-RL7 application, or ADUM3480BRSZ-RL7 equivalent, key selection criteria include its 20-lead SSOP package, dual-supply level translation (1.8 V ↔ 5 V), output default select via CTRL pins, and compliance with UL 1577, VDE 0884-17, and IEC 62368-1 safety standards.

Technical Context

The ADUM3480BRSZ-RL7 implements four unidirectional isolated channels with side-specific power domains: VDDL1/VDD1 for Side 1 (input) and VDDL2/VDD2 for Side 2 (output), each supporting independent voltage scaling. Its air-core transformer coupling eliminates LED aging and timing drift inherent in optocouplers, while integrated regulators (VDDC1/VDDC2) supply isolated logic rails without external DC-DC converters.

It uses separate control inputs (CTRL1/CTRL2) to configure output default states (high/low) during power-up or loss of input signal, and achieves pulse width distortion as low as 3 ns (B grade, 3 V operation). The device meets reinforced insulation requirements per DIN EN IEC 60747-17 with VIORM = 560 V_peak and VISO = 3750 V_RMS for 1 minute.

Key Specifications

Parameter	Value and Actual Design Meaning
Data Rate	Up to 25 Mbps NRZ - supports high-speed SPI clock and data lines without oversampling or retiming.
Propagation Delay	25 ns typical (B grade, 5 V) - enables tight timing budgets in real-time control loops and fast ADC interfaces.
Isolation Rating	3750 V_RMS for 1 min - certified for reinforced insulation in industrial mains-connected systems per UL/IEC/VDE.
I/O Voltage Range	1.8 V to 5.5 V - allows direct interfacing with low-voltage microcontrollers (1.8 V/3.3 V) and legacy 5 V logic.
Common-Mode Immunity	>25 kV/µs - maintains signal integrity in noisy motor drive or power converter environments.
Operating Temperature	−40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions.
Package	20-lead SSOP (0.209" width) - RoHS-compliant surface-mount footprint with 0.65 mm pitch and 5.3 mm creepage/clearance.

Pinout & Package

ADUM3480BRSZ-RL7 is housed in a 20-lead, RoHS-compliant, narrow-body SSOP package (5.3 mm × 7.2 mm, 0.65 mm pitch) with 5.3 mm minimum creepage and clearance per IEC 62368-1.

Pin/Terminal	Circuit Role	Design Meaning
1, 20	VDDL1 / VDDL2	I/O supply rails (1.8–5.5 V) for Side 1 inputs and Side 2 outputs - bypassed locally to GND1/GND2 with 0.01–0.1 µF ceramic capacitors.
2, 10, 11, 19	GND1 / GND2	Dedicated ground references for isolated sides - Pins 2/10 and 11/19 are internally shorted; both must connect to respective PCB ground planes near the device.
3–6	VIA–VID	Side 1 logic inputs - accept CMOS levels referenced to VDDL1; support 1.8 V–5.5 V logic families.
15–18	VOA–VOD	Side 2 logic outputs - drive CMOS loads referenced to VDDL2; configurable default state via CTRL2.
7	NC	No internal connection - may be left floating or tied to VDD1/GND1; no electrical function.
8, 13	VDD1 / VDD2	Core supply rails (3.0–5.5 V) powering internal isolator circuitry and regulators - require local 0.01–0.1 µF bypassing.
9, 12	VDDC1 / VDDC2	Regulated outputs (≈VDD1/VDD2) for isolated logic - not for external load sourcing; bypassed to respective GND.
14	CTRL2	Side 2 output default select - high = default high, low = default low during power-up or input loss.

Key Features

Feature	Design Value
iCoupler® transformer isolation	Monolithic air-core transformers replace LEDs and photodiodes - eliminating optocoupler aging, CTR degradation, and temperature-dependent timing drift.
Dual-supply level translation	Independent VDDLx (1.8–5.5 V) and VDDx (3.0–5.5 V) rails enable seamless interfacing between 1.8 V MCU peripherals and 5 V fieldbus transceivers.
Output default configuration	CTRL2 pin sets Side 2 output state during power-up or signal loss - critical for fail-safe control in motor drives and safety I/O.
High CMTI	>25 kV/µs common-mode transient immunity - ensures reliable operation in gate-driver feedback paths adjacent to fast-switching SiC MOSFETs.
Reinforced safety certification	UL 1577 (3750 V_RMS), VDE 0884-17 (VIORM = 560 V_peak), and IEC 62368-1 approval - qualifies for functional safety subsystems without additional barrier components.

Applications

SPI Isolation in Industrial PLCs	Motor Drive Feedback Interface
Use Scenario: Isolating SPI communication between a 3.3 V ARM Cortex-M7 host MCU and multiple isolated ADCs/DACs in a modular I/O rack. IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting SCLK, MOSI, MISO, and CS signals across galvanic barrier with matched propagation delay. Use Value: Enables full-duplex 20 Mbps SPI operation with <3 ns channel-to-channel skew, eliminating timing guard bands and reducing firmware overhead.	Use Scenario: Transmitting isolated current-sense and temperature feedback from a 1200 V SiC half-bridge to a 1.8 V FPGA controller in an EV traction inverter. IC Role / Device Role / Timing Role: Providing reinforced isolation for analog front-end digitization signals while rejecting >50 kV/µs switching transients from power stage. Use Value: Maintains signal fidelity at 100 kHz sampling rates without added filtering, reducing BOM count and board area versus optocoupler + RC solutions.
Isolated CAN Transceiver Bias Control	Medical Patient Monitoring Data Link
Use Scenario: Level-shifting and isolating bias control lines (STBY, RS) between a 5 V CAN controller and a 3.3 V isolated CAN transceiver in factory automation nodes. IC Role / Device Role / Timing Role: Unidirectional isolator handling slow-control GPIOs with programmable default state to ensure safe transceiver shutdown on power loss. Use Value: Eliminates need for discrete level shifters and pull-up resistors, simplifying layout and ensuring deterministic startup behavior.	Use Scenario: Isolating ECG/EEG sensor data streams from patient-connected front-end ASICs to a non-isolated processing unit in Class II medical devices. IC Role / Device Role / Timing Role: Reinforced-barrier isolator meeting IEC 60601-1 creepage/clearance and leakage current requirements for BF-rated applications. Use Value: Achieves 5.3 mm creepage in compact SSOP package - enabling miniaturized wearable monitors without external isolation transformers.

SPI Isolation in Industrial PLCs

Motor Drive Feedback Interface

Use Scenario: Isolating SPI communication between a 3.3 V ARM Cortex-M7 host MCU and multiple isolated ADCs/DACs in a modular I/O rack.

IC Role / Device Role / Timing Role: Quad-channel unidirectional isolator transmitting SCLK, MOSI, MISO, and CS signals across galvanic barrier with matched propagation delay.

Use Value: Enables full-duplex 20 Mbps SPI operation with <3 ns channel-to-channel skew, eliminating timing guard bands and reducing firmware overhead.

Use Scenario: Transmitting isolated current-sense and temperature feedback from a 1200 V SiC half-bridge to a 1.8 V FPGA controller in an EV traction inverter.

IC Role / Device Role / Timing Role: Providing reinforced isolation for analog front-end digitization signals while rejecting >50 kV/µs switching transients from power stage.

Use Value: Maintains signal fidelity at 100 kHz sampling rates without added filtering, reducing BOM count and board area versus optocoupler + RC solutions.

Isolated CAN Transceiver Bias Control

Medical Patient Monitoring Data Link

Use Scenario: Level-shifting and isolating bias control lines (STBY, RS) between a 5 V CAN controller and a 3.3 V isolated CAN transceiver in factory automation nodes.

IC Role / Device Role / Timing Role: Unidirectional isolator handling slow-control GPIOs with programmable default state to ensure safe transceiver shutdown on power loss.

Use Value: Eliminates need for discrete level shifters and pull-up resistors, simplifying layout and ensuring deterministic startup behavior.

Use Scenario: Isolating ECG/EEG sensor data streams from patient-connected front-end ASICs to a non-isolated processing unit in Class II medical devices.

IC Role / Device Role / Timing Role: Reinforced-barrier isolator meeting IEC 60601-1 creepage/clearance and leakage current requirements for BF-rated applications.

Use Value: Achieves 5.3 mm creepage in compact SSOP package - enabling miniaturized wearable monitors without external isolation transformers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SI8640BB-B-IS	Capacitive isolation; 5000 V_RMS rating; 150 Mbps max; no integrated regulators; requires external LDOs for split-rail operation.	Better suited for high-speed serial links (e.g., USB isolation), but lacks native 1.8 V I/O compatibility and failsafe default control.	Select when >25 Mbps or lower propagation delay (<10 ns) is required, and system can accommodate external power regulation.
ISO6740QDWR	Capacitive isolation; 5000 V_RMS; 50 Mbps; AEC-Q100 qualified; 1.71–5.5 V I/O; no output default select pin.	Designed for automotive infotainment and ADAS; lacks CTRL pin for fail-safe defaults and has higher quiescent current at 1.8 V.	Prefer for automotive-grade designs requiring AEC-Q100 qualification and higher speed, where fail-safe default is managed externally.

Compared with SI8640BB-B-IS and ISO6740QDWR, ADUM3480BRSZ-RL7 uniquely combines integrated regulators, 1.8 V I/O compatibility, and dedicated CTRL pins for fail-safe output defaults - making it optimal for industrial control and medical systems requiring deterministic power-up behavior and wide supply flexibility.

Availability

ADUM3480BRSZ-RL7 is available at Aetrix Electronics and suitable for industrial PLCs, motor drive feedback systems, isolated CAN node controllers, and medical patient monitoring equipment requiring stable component supply and long-term lifecycle assurance.

Supply support for ADUM3480BRSZ-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 with precision signal chain solutions.

The ADuM3480 family belongs to Analog Devices' iCoupler® digital isolator product line, engineered specifically for replacing optocouplers in high-reliability industrial and medical systems where long-term stability, low power, and safety certification are mandatory.

FAQ

What is the maximum data rate supported by ADUM3480BRSZ-RL7?

ADUM3480BRSZ-RL7 supports up to 25 Mbps in NRZ format, verified across all operating conditions (−40°C to +125°C) and supply configurations (1.8 V–5.5 V I/O, 3.0 V–5.5 V core). This rating applies to B-grade devices per the datasheet's Electrical Characteristics tables for 5 V, 3 V, and 1.8 V operation modes.

Does ADUM3480BRSZ-RL7 support 1.8 V logic on both sides of the isolation barrier?

Yes, ADUM3480BRSZ-RL7 supports 1.8 V I/O operation on both sides: VDDL1 and VDDL2 accept 1.8 V–5.5 V, enabling direct interface with 1.8 V microcontrollers and sensors. Core supplies VDD1/VDD2 must remain ≥3.0 V, but I/O rails operate independently - confirmed in Tables 7 and 9 of the Rev. B datasheet.

How is output default state configured on ADUM3480BRSZ-RL7?

ADUM3480BRSZ-RL7 uses the CTRL2 pin (Pin 14) to set the default output state on Side 2: logic high configures outputs VOA–VOD to default high during power-up or input loss; logic low configures them to default low. This is distinct from ADUM3481/ADUM3482, which use CTRL1/CTRL2 on both sides.

What safety certifications does ADUM3480BRSZ-RL7 hold?

ADUM3480BRSZ-RL7 is certified to UL 1577 (3750 V_RMS, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) for reinforced insulation (VIORM = 560 V_peak), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1. The * marking on the package denotes VDE 0884-17 compliance per Table 11 of the datasheet.

Can ADUM3480BRSZ-RL7 operate with a single supply voltage?

Yes, ADUM3480BRSZ-RL7 supports single-supply operation when the I/O voltage (VDDLx) equals the core supply (VDDx) within 3.0 V–5.5 V range - e.g., tying VDDL1 to VDD1 and VDDL2 to VDD2. This eliminates need for separate I/O regulators while maintaining full 25 Mbps performance and safety isolation.

ADUM3480BRSZ-RL7 Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc.

Series:: iCoupler®

Package/Case:: 20-SSOP (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Technology:: Magnetic Coupling

Type:: General Purpose

Isolated Power:: No

Number of Channels:: 4

Inputs - Side 1/Side 2:: 4/0

Channel Type:: Unidirectional

Voltage - Isolation:: 3750Vrms

Common Mode Transient Immunity (Min):: 25kV/µs

Data Rate:: 25Mbps

Propagation Delay tpLH / tpHL (Max):: 33ns, 33ns

Pulse Width Distortion (Max):: 3ns

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

Voltage - Supply:: 1.8V ~ 5.5V, 3V ~ 5.5V

Grade:: -

Qualification:: -

Operating Temperature:: -40°C ~ 125°C

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SSOP

ADUM3480BRSZ-RL7 FAQ

1.How can I place an order for ADUM3480BRSZ-RL7 through Aetrix?

Please submit a Request for Quotation (RFQ) for ADUM3480BRSZ-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 ADUM3480BRSZ-RL7 reliable?

The price and inventory of ADUM3480BRSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3480BRSZ-RL7 is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3480BRSZ-RL7 transactions.

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4.How is shipping managed for ADUM3480BRSZ-RL7?

ADUM3480BRSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ADUM3480BRSZ-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 ADUM3480BRSZ-RL7?

For technical support, including ADUM3480BRSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3480BRSZ-RL7 requirements.

6.How does Aetrix verify that ADUM3480BRSZ-RL7 is sourced from the original manufacturer or authorized distributors?

All ADUM3480BRSZ-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 ADUM3480BRSZ-RL7 meets industry standards.

7.What is the process for return or replacement of ADUM3480BRSZ-RL7?

All ADUM3480BRSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3480BRSZ-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 ADUM3480BRSZ-RL7 part is unused and in its original packaging.

Return procedure for ADUM3480BRSZ-RL7:

1.Submit a request within 90 days.

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

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