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Analog Devices Inc. ADUM3472WARSZ
- Part No.:
- ADUM3472WARSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3472WARSZ.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,806
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Product details
Overview
ADUM3472WARSZ from Analog Devices is a quad-channel digital isolator with integrated PWM controller and transformer driver for isolated dc-to-dc conversion. It delivers regulated 3.3 V to 24 V output at up to 2 W, supports 25 Mbps data rate (C grade), achieves 70% efficiency at 400 mA/5 V output, and operates up to 105°C. It is used in RS-485 transceiver bias supplies and isolated sensor interfaces requiring compact, self-contained isolation.
For engineers reviewing the ADUM3472WARSZ datasheet, ADUM3472WARSZ pinout, ADUM3472WARSZ application, or ADUM3472WARSZ equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed automotive-qualified operation, and two rigorously cross-checked alternative parts for isolated power + signal applications.
Technical Context
The ADUM3472WARSZ integrates iCoupler® chip-scale transformers for galvanic isolation of four logic channels and a secondary-side-controlled flyback DC-DC converter. Its PWM controller features adjustable 200 kHz–1 MHz oscillator frequency, soft start, pulse-by-pulse overcurrent protection, and thermal shutdown.
It supports multiple input/output voltage combinations: 5 V primary / 5 V isolated (400 mA max), 5 V / 3.3 V (400 mA), 3.3 V / 3.3 V (250 mA), and 5 V / 15 V (100 mA). All configurations maintain >25 kV/µs common-mode transient immunity and reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 2500 V rms (1 min); enables safety-critical barrier compliance in industrial and automotive systems |
| Output Power | 2 W max; eliminates need for external isolated DC-DC converter in space-constrained designs |
| Data Rate | 25 Mbps (C grade); supports high-speed serial interfaces like isolated CAN FD or SPI |
| Efficiency | 70% at full load (400 mA @ 5 V); reduces thermal load and improves system-level power budgeting |
| Operating Temp | −40°C to +105°C; qualified for under-hood automotive and industrial control environments |
| Common-Mode Immunity | >25 kV/µs; ensures robust operation in noisy motor drive or factory automation settings |
| Package | 20-lead SSOP; surface-mount compatible with standard reflow profiles and IPC-7351B land patterns |
Pinout & Package
ADUM3472WARSZ uses a 20-lead SSOP package (5.3 mm × 7.2 mm, 0.635 mm pitch) with creepage/clearance ≥5.3 mm and reinforced insulation per VDE 0884-17.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | 5 V or 3.3 V input for logic and PWM controller; UVLO threshold 2.6 V–2.8 V |
| GND1 | Primary-side ground | Reference for input-side I/O and controller; must be separated from GND2 by isolation barrier |
| INA, INB, INC, IND | Input data channels | CMOS-compatible inputs (VIH = 2.0 V min @ 5 V); support bidirectional or unidirectional configurations |
| OUTA, OUTB, OUTC, OUTD | Output data channels | CMOS outputs driving isolated side; VOH = VISO − 0.3 V, VOL = 0.4 V max @ 4 mA |
| VDD2 | Secondary-side logic supply | Internally regulated 5 V output (4.6–5.7 V); powers output buffers and feedback circuitry |
| GND2 | Secondary-side ground | Reference for isolated-side I/O and DC-DC regulation; galvanically isolated from GND1 |
| VISO | Regulated isolated output | Adjustable 3.3–24 V via external resistor divider; 400 mA max @ 5 V, 250 mA @ 3.3 V |
| FB | Feedback input | Connects to resistor divider on VISO; sets output via internal 1.25 V reference (±10% tolerance) |
| ROC | Oscillator frequency set | Resistor-to-ground sets fSW from 200 kHz to 1 MHz; enables EMI optimization and transformer sizing |
| EN | Enable control | Active-high logic input; disables PWM and isolator outputs when low, reducing quiescent current |
Key Features
| Feature | Design Value |
|---|---|
| Integrated transformer driver | Eliminates external gate driver IC and discrete MOSFETs; simplifies isolated DC-DC design and reduces BOM count |
| Secondary-side regulation | Uses optocoupler-free feedback via isolated VDD2 and FB pin; improves long-term stability vs. primary-side sensing |
| Pulse-by-pulse OCP | Detects overcurrent on each switching cycle; prevents transformer saturation and enables safe restart after fault |
| Soft start | Gradually ramps PWM duty cycle at power-up; avoids inrush current into output capacitors and downstream loads |
| Reinforced insulation | VIORM = 560 V peak per VDE 0884-17; meets basic + reinforced requirements for functional safety in IEC 62368-1 systems |
Applications
| Industrial Field Bus Isolation | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes and distributed I/O modules subject to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Provides both signal isolation (4 channels) and isolated 5 V bias for transceiver ICs, replacing separate isolator + DC-DC solution. Use Value: Reduces board area by 40% versus discrete isolator + isolated supply; maintains 25 Mbps throughput for high-speed diagnostics. |
Use Scenario: Isolating temperature and pressure sensors in EV battery management systems where high dv/dt noise exists near traction inverters. IC Role / Device Role / Timing Role: Delivers 3.3 V isolated power and bidirectional data paths between MCU and sensor ASIC across reinforced barrier. Use Value: Enables ASIL-B compliant isolation without external optocouplers or isolated regulators; withstands >25 kV/µs transients during inverter switching. |
| Power Supply Start-up Bias | Isolated Gate Drive Support |
|
Use Scenario: Providing initial bias to main SMPS controller ICs during cold-start in industrial AC-DC power supplies before main output regulation engages. IC Role / Device Role / Timing Role: Generates regulated 15 V isolated output (via external transformer) to power auxiliary controllers and monitoring circuits. Use Value: Eliminates need for dedicated startup winding or auxiliary flyback; supports 100 mA @ 15 V with <3% load regulation. |
Use Scenario: Supplying isolated gate drive power and level-shifted PWM signals to half-bridge IGBTs in servo drives operating at 20 kHz switching frequency. IC Role / Device Role / Timing Role: Supplies 15 V isolated gate bias and transmits complementary PWM edges with <8 ns pulse width distortion. Use Value: Ensures matched propagation delay (<15 ns skew) across all four channels, preventing shoot-through in bridge drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated power + signal isolation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4472ARIZ | Higher isolation rating (5000 V rms), 105°C operation, same 20-lead SOIC package but larger footprint (7.5 mm × 12.8 mm) | Required where UL 1577 reinforced insulation >3750 V rms is mandated (e.g., medical power supplies) | Select ADUM4472ARIZ when higher dielectric strength is required; note PCB layout change needed due to SOIC vs. SSOP |
| SI88442ED-IS | Capacitive isolation, 5000 V rms, 4-channel + integrated DC-DC, but fixed 5 V output only (no adjustable VISO) | Suitable for cost-sensitive industrial controls where 5 V isolated supply suffices and adjustable output is unnecessary | Choose SI88442ED-IS for fixed 5 V applications with tighter cost targets; lacks VISO adjustability and ROC-based frequency tuning |
Compared with ADUM3472WARSZ, ADUM4472ARIZ offers higher isolation voltage in a larger SOIC package, while SI88442ED-IS trades VISO adjustability and frequency control for lower unit cost and identical channel count-making each suitable for distinct safety, size, or configurability constraints.
Availability
ADUM3472WARSZ is available at Aetrix Electronics and suitable for industrial field bus isolation, automotive sensor interfaces, power supply start-up bias, and isolated gate drive support requiring stable component supply across extended temperature and regulatory-compliant designs.
Supply support for ADUM3472WARSZ 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 ADuM347x family delivers integrated signal + power isolation in a single package, targeting space-constrained systems needing certified reinforced insulation without external DC-DC converters or optocouplers.
FAQ
What is the maximum adjustable output voltage range supported by ADUM3472WARSZ?
ADUM3472WARSZ supports an isolated output voltage range of 3.3 V to 24 V, set via external resistor divider on the FB pin using the internal 1.25 V reference. This range is confirmed in the General Description and Electrical Characteristics tables for configurations including 5 V primary / 15 V isolated output, where VISO = 13.5–16.5 V is specified. The device maintains regulation and 70% efficiency across this full span when paired with appropriate transformer design.
Does ADUM3472WARSZ support both 3.3 V and 5 V primary-side input supplies?
Yes, ADUM3472WARSZ supports dual primary input voltages: 3.0–3.6 V and 4.5–5.5 V. Electrical Characteristics Tables 2 and 1 confirm operation at 3.3 V input (with 250 mA max @ 3.3 V output) and 5 V input (with 400 mA max @ 5 V output). Undervoltage lockout thresholds (2.6 V/2.8 V) and internal regulator behavior are validated for both rails, enabling flexible system-level power architecture.
What safety certifications does ADUM3472WARSZ hold?
ADUM3472WARSZ holds UL 1577 (2500 V rms, 1 min), IEC/EN/CSA 62368-1, IEC/CSA 61010-1, CQC GB 4943.1, and DIN EN IEC 60747-17 (VDE 0884-17) approvals. Table 6 explicitly lists VIORM = 560 V peak under VDE 0884-17, confirming reinforced insulation. These certifications are tested per manufacturer's Rev. C datasheet and apply directly to the ADUM3472WARSZ variant.
How does the ADUM3472WARSZ achieve secondary-side regulation without an optocoupler?
ADUM3472WARSZ uses an internal shunt regulator on the secondary side that monitors VISO via the FB pin and adjusts PWM duty cycle through isolated iCoupler® channels. This closed-loop control references the internal 1.25 V bandgap and requires no optocoupler or external TL431. The method is detailed in the General Description and confirmed in Application Schematics (Figure 38) and the Feedback Voltage Setpoint specification (1.125–1.375 V).
Is ADUM3472WARSZ pin-compatible with other ADuM347x variants like ADUM3471 or ADUM3474?
Yes, all ADuM347x devices-including ADUM3472WARSZ-share identical 20-lead SSOP pinouts and package dimensions. Differences lie solely in channel direction configuration (e.g., 2/2 bidirectional vs. 3/1) and supply current values (e.g., IDD1(Q) = 16 mA typ for ADUM3472 vs. 18 mA for ADUM3474), not pin function or assignment. Pin Configurations and Function Descriptions (page 15) confirm uniform mapping across the family.
ADUM3472WARSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 1Mbps
- Propagation Delay tpLH / tpHL (Max):
- 100ns, 100ns
- Pulse Width Distortion (Max):
- 40ns
- Rise / Fall Time (Typ):
- 2.5ns, 2.5ns
- Voltage - Supply:
- 3V ~ 3.6V, 4.5V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
ADUM3472WARSZ FAQ
1.How can I place an order for ADUM3472WARSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3472WARSZ 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 ADUM3472WARSZ reliable?
The price and inventory of ADUM3472WARSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3472WARSZ is usually 5 days.
3.What payment methods are accepted for ADUM3472WARSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3472WARSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3472WARSZ?
ADUM3472WARSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3472WARSZ 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 ADUM3472WARSZ?
For technical support, including ADUM3472WARSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3472WARSZ requirements.
6.How does Aetrix verify that ADUM3472WARSZ is sourced from the original manufacturer or authorized distributors?
All ADUM3472WARSZ 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 ADUM3472WARSZ meets industry standards.
7.What is the process for return or replacement of ADUM3472WARSZ?
All ADUM3472WARSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3472WARSZ, 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 ADUM3472WARSZ part is unused and in its original packaging.
Return procedure for ADUM3472WARSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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