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Analog Devices Inc. ADUM3472ARSZ-RL7
- Part No.:
- ADUM3472ARSZ-RL7
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3472ARSZ-RL7.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,245
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Product details
Overview
ADUM3472ARSZ-RL7 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 isolated output up to 2 W, supports 25 Mbps data rate (C grade), features 20-lead SSOP package, and provides 25 kV/µs common-mode transient immunity. It enables compact isolated power + signal transfer in industrial fieldbus interfaces.
For engineers reviewing the ADUM3472ARSZ-RL7 datasheet, ADUM3472ARSZ-RL7 pinout, ADUM3472ARSZ-RL7 application, or ADUM3472ARSZ-RL7 equivalent, this page delivers verified specifications, functional context, real-world use cases, and validated alternative options - all grounded in Analog Devices' Rev. C datasheet and official ordering guide.
Technical Context
The ADUM3472ARSZ-RL7 integrates iCoupler® chip-scale transformers for galvanic isolation of four independent logic channels and an on-chip PWM controller with transformer driver for secondary-side regulated dc-to-dc conversion. Its oscillator frequency is adjustable from 200 kHz to 1 MHz via external resistor.
It implements pulse-by-pulse overcurrent protection, soft-start at power-up, and thermal shutdown at 150°C. Secondary-side regulation uses feedback voltage setpoint of 1.25 V ±0.125 V, enabling precise output voltage control across 3.3 V–24 V range using external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 2500 V rms for 1 minute (UL 1577); reinforced insulation rated 560 V peak (DIN EN IEC 60747-17) |
| Output Power | 2 W max at regulated isolated output (e.g., 400 mA @ 5 V or 250 mA @ 3.3 V) |
| Data Rate | 25 Mbps (C grade only); DC to 2 Mbps for A grade |
| Propagation Delay | 30–60 ns (typical) at 25 Mbps; <40 ns pulse width distortion ensures timing integrity |
| Common-Mode Immunity | >25 kV/µs - maintains signal integrity in high-noise motor drives and industrial PLCs |
| Operating Temperature | −40°C to +105°C ambient - qualified for automotive and industrial environments |
| Package | 20-lead SSOP (0.154" wide), 0.65 mm pitch - compatible with standard surface-mount assembly |
Pinout & Package
ADUM3472ARSZ-RL7 is housed in a 20-lead SSOP package with 0.65 mm lead pitch and 0.154" body width. Pin functions are defined per Analog Devices' Rev. C datasheet (Figure 15, Pin Configurations).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply input | Accepts 3.0–5.5 V; powers primary logic and PWM controller |
| GND1 | Primary-side ground reference | Return path for VDD1 and input-side I/O channels |
| INA, INB, INC, IND | Input signal terminals (4 channels) | CMOS-compatible inputs; VIH = 2.0 V min (5 V supply), 1.6 V min (3.3 V supply) |
| OUTA, OUTB, OUTC, OUTD | Isolated output signal terminals (4 channels) | Drive CMOS loads up to 4 mA; VOH ≥ 4.8 V @ 5 V, VOL ≤ 0.4 V |
| VDD2 | Secondary-side auxiliary supply | Internal LDO output (5.0 V ±0.4 V) for secondary logic; max 50 mA load |
| VISO | Regulated isolated output | Programmable 3.3–24 V via feedback resistor divider; 2 W capability |
| FB | Feedback input for VISO regulation | Connects to resistor divider; internal 1.25 V reference sets output voltage |
| ROC | Oscillator frequency setting | External resistor (50 kΩ–270 kΩ) sets fSW = 200–1000 kHz |
| GND2 | Secondary-side ground reference | Isolated return for VDD2, VISO, and output-side I/O channels |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated power + signal | Eliminates need for external isolated dc-dc converter in ≤2 W designs |
| Secondary-side regulation | Uses internal 1.25 V reference and FB pin for precise, load- and line-stable VISO |
| Pulse-by-pulse OCP | Detects overcurrent on each switching cycle - prevents transformer saturation and MOSFET failure |
| Soft-start function | Controls inrush current during power-up to avoid input supply droop and transformer stress |
| Reinforced safety certification | UL 1577, VDE 0884-17, IEC 62368-1, and IEC 61010-1 compliance for industrial and automotive systems |
Applications
| Industrial Fieldbus Isolation | RS-485 Transceiver Bias Supply |
|---|---|
|
Use Scenario: Isolating Modbus RTU nodes in factory automation networks with 24 V bus and noisy ground loops. IC Role / Device Role / Timing Role: Provides galvanically isolated 5 V bias for RS-485 transceivers while transferring control/status signals across isolation barrier. Use Value: Enables robust communication without ground-loop-induced errors; 25 kV/µs CMTI prevents data corruption during motor switching transients. |
Use Scenario: Powering isolated RS-485 transceivers in distributed I/O modules where primary side runs at 3.3 V or 5 V. IC Role / Device Role / Timing Role: Generates regulated 5 V isolated supply and transfers DE/RE control and data signals across barrier. Use Value: Reduces BOM count by integrating power and signal isolation - eliminates discrete isolated dc-dc and four-channel digital isolator. |
| Automotive Battery Management | Isolated Sensor Interface |
|
Use Scenario: Isolating cell voltage monitoring circuits in high-voltage EV battery packs (up to 800 V bus). IC Role / Device Role / Timing Role: Supplies isolated 3.3 V power to ADC front-end and transfers sampled voltage data across barrier. Use Value: Supports reinforced insulation requirements (560 V peak VIORM) and operates reliably at 105°C ambient in under-hood environments. |
Use Scenario: Interfacing isolated current/voltage sensors in motor drive inverters with gate driver control logic. IC Role / Device Role / Timing Role: Delivers isolated 15 V supply for sensor excitation and transfers analog-to-digital status bits with <60 ns propagation delay. Use Value: Maintains timing synchronization between sensing and control domains; low PWD (<8 ns) preserves pulse fidelity in fast-response systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM3471ARSZ-RL7 | Same package and architecture; 3-channel isolator + PWM controller (vs. 4-channel in ADUM3472) | Limited to 3 signal paths; lower IDD1 quiescent current (15 mA vs. 16 mA at 5 V/2 Mbps) | Select when system requires only three isolated data lines and space/power budget is constrained. |
| ADUM4472ARIZ-RL | Wider operating temperature (−40°C to +125°C); higher isolation rating (5000 V rms); same 4-channel + PWM functionality | Qualified for extended-temperature automotive and aerospace; larger 20-lead SOIC package (7.6 mm width vs. 5.3 mm SSOP) | Choose for mission-critical applications requiring higher reliability margin and extended thermal range. |
Compared with ADUM3472ARSZ-RL7, ADUM3471ARSZ-RL7 reduces channel count and power consumption but sacrifices one isolation path, while ADUM4472ARIZ-RL offers higher isolation and temperature ratings at the cost of larger footprint and higher price - enabling trade-offs between size, ruggedness, and performance.
Availability
ADUM3472ARSZ-RL7 is available at Aetrix Electronics and suitable for industrial fieldbus isolation, RS-485 transceiver biasing, automotive battery management, and isolated sensor interface applications requiring stable component supply and long-term design continuity.
Supply support for ADUM3472ARSZ-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 ADuM347x family is designed for compact, certified isolated power and signal transfer in space-constrained industrial and automotive systems - combining iCoupler isolation, PWM control, and transformer driving in a single IC.
FAQ
What output voltage ranges does the ADUM3472ARSZ-RL7 support?
The ADUM3472ARSZ-RL7 supports programmable isolated output voltages from 3.3 V to 24 V using an external resistor divider on the FB pin. The internal 1.25 V reference enables precise regulation - e.g., 5.0 V ±0.5 V at 400 mA load, or 15 V ±0.75 V at 100 mA - with line and load regulation specified in Tables 1–4 of the datasheet.
Does the ADUM3472ARSZ-RL7 require an external transformer?
Yes, the ADUM3472ARSZ-RL7 requires an external transformer for isolated dc-dc conversion. It integrates the PWM controller and secondary-side synchronous rectifier driver, but the transformer must be selected per Analog Devices' Application Schematics (Figure 38/39) and Transformer Design section - including turns ratio, ET constant, and isolation voltage rating matching the 2500 V rms requirement.
What is the maximum data rate supported by the ADUM3472ARSZ-RL7?
The ADUM3472ARSZ-RL7 supports up to 25 Mbps per channel in C-grade devices (confirmed in Table 1 AC Specifications). A-grade variants are limited to 1 Mbps. The part number suffix "ARSZ" corresponds to the C-grade version per Analog Devices' Ordering Guide, making 25 Mbps the guaranteed maximum data rate for ADUM3472ARSZ-RL7.
How does the ADUM3472ARSZ-RL7 achieve secondary-side regulation without optocouplers?
The ADUM3472ARSZ-RL7 achieves secondary-side regulation using an internal error amplifier that compares the FB pin voltage against a precision 1.25 V reference. Feedback is returned across the isolation barrier via the integrated iCoupler technology - eliminating optocouplers and their aging-related drift. This architecture ensures stable output voltage across temperature and load without external compensation components.
Is the ADUM3472ARSZ-RL7 qualified for automotive applications?
Yes, the ADUM3472ARSZ-RL7 is explicitly qualified for automotive applications per the datasheet's Automotive Products section (page 34) and meets AEC-Q100 stress test requirements. It operates from −40°C to +105°C, carries reinforced insulation certifications (VDE 0884-17, UL 1577), and supports safety-critical subsystems such as battery monitoring and isolated sensor interfaces in EVs.
ADUM3472ARSZ-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:
- 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:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
ADUM3472ARSZ-RL7 FAQ
1.How can I place an order for ADUM3472ARSZ-RL7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3472ARSZ-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 ADUM3472ARSZ-RL7 reliable?
The price and inventory of ADUM3472ARSZ-RL7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3472ARSZ-RL7 is usually 5 days.
3.What payment methods are accepted for ADUM3472ARSZ-RL7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3472ARSZ-RL7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3472ARSZ-RL7?
ADUM3472ARSZ-RL7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3472ARSZ-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 ADUM3472ARSZ-RL7?
For technical support, including ADUM3472ARSZ-RL7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3472ARSZ-RL7 requirements.
6.How does Aetrix verify that ADUM3472ARSZ-RL7 is sourced from the original manufacturer or authorized distributors?
All ADUM3472ARSZ-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 ADUM3472ARSZ-RL7 meets industry standards.
7.What is the process for return or replacement of ADUM3472ARSZ-RL7?
All ADUM3472ARSZ-RL7 units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3472ARSZ-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 ADUM3472ARSZ-RL7 part is unused and in its original packaging.
Return procedure for ADUM3472ARSZ-RL7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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