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Analog Devices Inc. ADUM3480ARSZ
- Part No.:
- ADUM3480ARSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3480ARSZ.pdf
- Description:
- DGTL ISO 3750VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:384
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Product details
Overview
ADuM3480ARSZ from Analog Devices is a quad-channel digital isolator using iCoupler® transformer-based isolation, providing 3.75 kVRMS reinforced insulation, 25 Mbps data rate, and 25 ns typical propagation delay. It supports dual-supply operation with 1.8 V–5.5 V I/O voltage (VDDLx) and 3.0 V–5.5 V core voltage (VDDx), enabling level translation in isolated SPI interfaces for industrial PLCs.
For engineers reviewing the ADuM3480ARSZ datasheet, ADuM3480ARSZ pinout, ADuM3480ARSZ application, or ADuM3480ARSZ equivalent, key selection criteria include its 20-lead SSOP package, output default select via CTRL pins, high common-mode transient immunity (>25 kV/µs), and compliance with UL 1577, VDE 0884-17, and IEC 62368-1 safety standards.
Technical Context
The ADuM3480ARSZ implements four unidirectional isolated channels using monolithic air-core transformers, with separate core (VDD1/VDD2) and I/O (VDDL1/VDDL2) supplies. Its architecture enables independent logic-level interfacing on each side - e.g., 1.8 V microcontroller I/O to 5 V FPGA domain - while maintaining galvanic separation.
All channels feature configurable output default states via dedicated CTRL1/CTRL2 pins, and internal regulators (VDDC1/VDDC2) supply isolated side logic. The device achieves <3 ns rise/fall time and pulse width distortion as low as 3 ns (B grade), critical for timing-sensitive serial protocols.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Up to 25 Mbps NRZ - supports high-speed SPI clock domains without oversampling or protocol overhead |
| Propagation Delay | 25 ns typical - enables sub-40 ns round-trip latency for real-time control loop feedback across isolation barrier |
| Isolation Rating | 3.75 kVRMS for 1 minute - meets reinforced insulation requirements per UL 1577 and VDE 0884-17 |
| I/O Voltage Range | 1.8 V to 5.5 V - allows direct interface with 1.8 V, 3.3 V, and 5 V logic families without external level shifters |
| Common-Mode Immunity | >25 kV/µs - sustains reliable operation 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 - RoHS-compliant surface-mount footprint with 5.3 mm creepage/clearance for IPC-2221 Class B layouts |
Pinout & Package
ADuM3480ARSZ uses a 20-lead, 0.65 mm pitch, RoHS-compliant SSOP package (JEDEC MO-153). Pin 1 is marked by a dot; leads are numbered counterclockwise. Thermal resistance θJC = 50.5°C/W measured on 4-layer board with thin traces.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | VDDL1 / VDDL2 | I/O supply for Side 1 / Side 2 - sets logic threshold (VIH = 0.7×VDDLx); bypass with 0.01–0.1 µF ceramic capacitor |
| 2, 10, 11, 19 | GND1 / GND2 | Isolated ground references - Pins 2&10 and 11&19 are internally shorted; both must connect to respective PCB ground planes |
| 3–6 | VIA–VID | Side 1 input channels A–D - CMOS-compatible inputs accepting 1.8 V–5.5 V logic levels |
| 14 | CTRL2 | Side 2 output default select - high = default high, low = default low; determines state during power-up or loss of input signal |
| 15–18 | VOA–VOD | Side 2 output channels A–D - drive 4 mA sink/source at 1.8 V–5.5 V; VOL ≤ 0.4 V @ 4 mA |
| 7 | NC | No connection - electrically floating; may be left unconnected or tied to VDD1/GND1 for mechanical stability |
| 8, 13 | VDD1 / VDD2 | Core supply for Side 1 / Side 2 - powers internal transformer drivers and regulators; range 3.0–5.5 V |
| 9, 12 | VDDC1 / VDDC2 | Regulator outputs - provide isolated regulated voltage to internal logic; not for external load use |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced insulation certification | DIN EN IEC 60747-17 (VDE 0884-17) rated VIORM = 560 Vpeak, enabling single-component isolation in safety-critical systems |
| Low dynamic power consumption | IDDIL(D) = 0.25 µA/Mbps at 1.8 V I/O - reduces heat generation in dense, thermally constrained modules |
| Output default configuration | CTRL1/CTRL2 pins set safe startup state - prevents undefined outputs during boot or fault conditions in motor gate drivers |
| High temperature operation | Rated up to +125°C ambient - eliminates derating concerns in enclosed industrial enclosures or near power stages |
| Level translation capability | Independent VDDLx and VDDx supplies - allows 1.8 V MCU to communicate with 5 V ADC or DAC across isolation barrier |
Applications
| SPI Isolation in Motor Drives | Isolated Data Acquisition |
|---|---|
Use Scenario: Isolating SPI bus between a 3.3 V ARM Cortex-M7 controller and 5 V isolated ADCs in servo drive feedback loops. IC Role / Device Role / Timing Role: ADuM3480ARSZ provides four unidirectional channels: three for MOSI/MISO/SCLK, one for chip-select, with matched propagation delay (<7 ns skew) to preserve timing margins. Use Value: Enables full 25 Mbps SPI operation without clock stretching, preserving closed-loop bandwidth while meeting IEC 61800-5-1 reinforced insulation requirements. |
Use Scenario: Galvanically isolating analog front-end sensors (RTDs, strain gauges) from host MCU in hazardous-area process transmitters. IC Role / Device Role / Timing Role: ADuM3480ARSZ separates sensor-side 1.8 V precision ADC interface from 3.3 V host domain, with VDDL1 = 1.8 V and VDDL2 = 3.3 V. Use Value: Eliminates ground loops and noise coupling while supporting low-voltage sensor interface - reducing system noise floor by >20 dB compared to optocoupler-based solutions. |
| Industrial Fieldbus Node Isolation | Programmable Logic Controller (PLC) Digital I/O |
Use Scenario: Isolating RS-485 PHY control lines (TXEN, RXEN, DE) and status signals in PROFIBUS DP slave nodes operating at 12 Mbps. IC Role / Device Role / Timing Role: ADuM3480ARSZ routes direction-control and fault-reporting signals across isolation barrier with <40 ns total propagation delay. Use Value: Maintains deterministic bus arbitration timing and meets PROFIBUS conformance test requirement for <100 ns inter-signal skew. |
Use Scenario: Providing channel-by-channel isolation for 24 V DC digital input modules in modular PLC backplanes. IC Role / Device Role / Timing Role: ADuM3480ARSZ interfaces 24 V opto-coupler inputs to 3.3 V FPGA logic, with CTRL2 pin setting outputs low during power-on reset. Use Value: Ensures fail-safe input state during startup and brownout, preventing spurious actuation of connected solenoids or valves. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8640ED-IS | Capacitive isolation; 5 kVRMS rating; 150 Mbps max; no internal regulators; requires external VDDIO supplies | Better suited for high-speed Ethernet PHY isolation or USB isolation where >25 Mbps is required | Select SI8640ED-IS when higher data rate or lower jitter (<0.5 ns) is mandatory and external level-shifting is acceptable |
| ISO6740QDWR | Capacitive isolation; 5 kVRMS; 50 Mbps; 3.0–5.5 V only I/O; no 1.8 V support; integrated LDOs not present | Targeted at automotive infotainment CAN/LIN gateways requiring AEC-Q100 Grade 1 qualification | Choose ISO6740QDWR for automotive designs needing AEC-Q100 compliance and higher speed, but not 1.8 V compatibility |
Compared with SI8640ED-IS and ISO6740QDWR, ADuM3480ARSZ uniquely combines 1.8 V I/O support, integrated isolated regulators, and VDE 0884-17 reinforced certification in a single SSOP package - making it optimal for cost-sensitive industrial automation where mixed-voltage domain bridging and safety certification are co-required.
Availability
ADuM3480ARSZ is available at Aetrix Electronics and suitable for industrial fieldbus nodes, isolated SPI data converters, and programmable logic controller digital I/O modules requiring stable component supply and long-term lifecycle assurance.
Supply support for ADuM3480ARSZ 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, headquartered in Wilmington, MA.
The ADuM3480ARSZ belongs to the iCoupler® digital isolator product line, designed specifically for replacing optocouplers in industrial, energy, and medical systems where reliability, speed, and safety-certified galvanic isolation are essential.
FAQ
What is the maximum data rate supported by the ADuM3480ARSZ?
The ADuM3480ARSZ supports up to 25 Mbps in NRZ format, verified across all operating voltages (1.8 V, 3.0 V, and 5.0 V I/O) and temperature range (−40°C to +125°C). This rating applies to B-grade devices; A-grade versions are specified for 1 Mbps operation only. The 25 Mbps capability enables full-speed SPI communication without protocol throttling.
Does the ADuM3480ARSZ require external level shifters when interfacing 1.8 V and 5 V logic domains?
No. The ADuM3480ARSZ has independent VDDL1 and VDDL2 supplies that accept 1.8 V–5.5 V, allowing direct connection to 1.8 V microcontrollers on one side and 5 V FPGAs or ADCs on the other. Its input thresholds scale with VDDLx (VIH = 0.7×VDDLx), eliminating need for external translators in mixed-voltage isolation bridges.
How does the CTRL2 pin affect the behavior of the ADuM3480ARSZ outputs?
The CTRL2 pin configures the default output state of Side 2 (VOA–VOD) during power-up, brownout, or loss of input signal. When CTRL2 = high, outputs default to logic high; when CTRL2 = low, they default to logic low. This ensures predictable, fail-safe behavior in motor control or safety I/O applications where undefined states could cause hazardous conditions.
What safety certifications apply to the ADuM3480ARSZ?
The ADuM3480ARSZ carries UL 1577 (3750 VRMS, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) reinforced insulation (VIORM = 560 Vpeak), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1 approvals. These certifications validate its suitability for functional and safety-critical isolation in industrial equipment, medical devices, and energy systems.
Can the ADuM3480ARSZ operate with only one supply voltage instead of separate core and I/O rails?
Yes. When VDDL1 is within the VDD1 range (3.0–5.5 V), it may be tied directly to VDD1 - similarly for VDDL2 and VDD2 - enabling single-supply operation per side. However, separating them is required to exploit level translation (e.g., 1.8 V I/O with 5 V core), and internal regulators (VDDC1/VDDC2) remain active regardless of supply configuration.
ADUM3480ARSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- iCoupler®
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 90ns, 90ns
- Pulse Width Distortion (Max):
- 6ns
- 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
ADUM3480ARSZ FAQ
1.How can I place an order for ADUM3480ARSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3480ARSZ 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 ADUM3480ARSZ reliable?
The price and inventory of ADUM3480ARSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3480ARSZ is usually 5 days.
3.What payment methods are accepted for ADUM3480ARSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3480ARSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3480ARSZ?
ADUM3480ARSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3480ARSZ 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 ADUM3480ARSZ?
For technical support, including ADUM3480ARSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3480ARSZ requirements.
6.How does Aetrix verify that ADUM3480ARSZ is sourced from the original manufacturer or authorized distributors?
All ADUM3480ARSZ 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 ADUM3480ARSZ meets industry standards.
7.What is the process for return or replacement of ADUM3480ARSZ?
All ADUM3480ARSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3480ARSZ, 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 ADUM3480ARSZ part is unused and in its original packaging.
Return procedure for ADUM3480ARSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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