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Analog Devices Inc. ADUM3472CRSZ
- Part No.:
- ADUM3472CRSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3472CRSZ.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,786
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Product details
Overview
ADuM3472CRSZ 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), achieves 70% efficiency at 400 mA/5 V, and operates up to 105°C. It enables compact isolated power + signal transfer in industrial RS-485 transceivers.
For engineers reviewing the ADuM3472CRSZ datasheet, ADuM3472CRSZ pinout, ADuM3472CRSZ application, or ADuM3472CRSZ equivalent, key selection factors include its 20-lead SSOP package, reinforced insulation rating (VIORM = 560 V peak), 200 kHz–1 MHz adjustable switching frequency, and quad-channel isolation with <8 ns pulse width distortion at 25 Mbps.
Technical Context
The ADuM3472CRSZ integrates iCoupler® chip-scale transformers for galvanic isolation of all four data channels and employs secondary-side regulation via an internal error amplifier and optocoupler-emulator feedback path. Its PWM controller features soft-start, pulse-by-pulse overcurrent protection, and thermal shutdown at 150°C.
It supports multiple input/output voltage configurations: 5 V primary → 5 V/3.3 V/15 V isolated outputs, or 3.3 V primary → 3.3 V output. The oscillator frequency is set externally via ROC (200–1000 kHz) or internally (192–515 kHz), and VFB is fixed at 1.25 V ±0.125 V for output voltage programming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | VISO = 2500 V rms (1 min); VIORM = 560 V peak - meets reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17) |
| Output Power | 2 W max - sufficient to power isolated gate drivers, ADCs, or microcontrollers without external dc-dc converter |
| Data Rate | 25 Mbps (C grade) - supports high-speed industrial fieldbus interfaces like isolated CAN FD or RS-422 |
| Propagation Delay Skew | ≤15 ns - ensures tight timing alignment across all four channels for synchronous sampling or clock forwarding |
| Common-Mode Transient Immunity | >25 kV/µs - maintains signal integrity in noisy motor drive or power supply environments |
| Efficiency | 70% at 400 mA / 5 V output - reduces heat generation and simplifies thermal design in sealed enclosures |
| Operating Temperature | −40°C to +105°C - qualified for under-hood automotive and industrial control applications |
Pinout & Package
ADuM3472CRSZ uses a 20-lead SSOP (Shrink Small Outline Package) with 0.65 mm lead pitch, JEDEC MO-153 compliant, and 5.3 mm minimum creepage/clearance between input and output sides.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply input | Accepts 3.3 V or 5.0 V; powers logic and PWM controller; UVLO thresholds at 2.6 V / 2.8 V |
| GND1 | Primary-side ground reference | Return for VDD1 and input-side I/O channels (A/B/C/D); 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, 1.6 V @ 3.3 V); support DC–25 Mbps operation |
| VIA, VIB, VIC, VID | Isolated output data channels | CMOS outputs referenced to VISO; VOH = VISO − 0.3 V, VOL = 0.4 V max @ 4 mA load |
| VDD2 | Secondary-side auxiliary supply | Internal LDO output (5.0 V ±0.4 V); powers secondary-side logic and feedback circuitry |
| GND2 | Secondary-side ground reference | Return for VISO, VDD2, and output-side I/O; forms isolated domain with VISO |
| VISO | Regulated isolated output | Programmable 3.3–24 V via external resistor divider on FB pin; 400 mA max @ 5 V (70% efficiency) |
| FB | Feedback input for VISO regulation | Connects to resistor divider from VISO; internal VFB = 1.25 V ±0.125 V sets output voltage |
| ROC | Oscillator frequency setting | Resistor from ROC to GND sets fSW: 200 kHz (270 kΩ) to 1000 kHz (50 kΩ) |
| EN | Enable control | Active-high; disables PWM and isolator outputs when low; internal pull-down |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated dc-dc converter | Eliminates need for external isolated power supply-reduces BOM count and PCB area in space-constrained designs |
| Secondary-side regulation | Uses isolated feedback path for tight output voltage accuracy (±2% load regulation) without optocoupler latency |
| Pulse-by-pulse overcurrent protection | Detects transformer saturation or short-circuit events cycle-by-cycle, enabling fast shutdown (<1 µs response) |
| Soft-start function | Controls inrush current during power-up to prevent input rail droop and transformer core saturation |
| Reinforced insulation certification | UL 1577, VDE 0884-17, and IEC 62368-1 compliance enables use in safety-critical industrial and automotive systems |
Applications
| RS-485 Transceiver Isolation | Industrial PLC Analog Input Module |
|---|---|
|
Use Scenario: Isolating half-duplex RS-485 communication lines in factory automation networks exposed to ground potential differences up to 1 kV. IC Role / Device Role / Timing Role: ADuM3472CRSZ provides both isolated 5 V power for the transceiver IC and bidirectional data isolation for TX/RX signals. Use Value: Single-chip solution replaces discrete isolators + isolated dc-dc, reducing component count by ≥4 and layout area by >35%. |
Use Scenario: Powering and isolating 16-bit sigma-delta ADCs and precision op-amps in programmable logic controller analog input cards. IC Role / Device Role / Timing Role: Supplies regulated 5 V isolated power to ADC front-end while isolating serial interface (SPI) and reference voltage monitoring lines. Use Value: Achieves 85 dB CMRR at 50/60 Hz and maintains ADC ENOB ≥15.2 bits due to low-noise 50 mVp-p output ripple. |
| Automotive Battery Management System | Motor Drive Gate Driver Interface |
|
Use Scenario: Isolating cell voltage measurement circuits and MCU communication in high-voltage EV battery packs (up to 900 V bus). IC Role / Device Role / Timing Role: Delivers 3.3 V isolated power to front-end multiplexers and isolates UART/SPI links between monitor ICs and host MCU. Use Value: VIORM = 560 V peak and 5.3 mm creepage meet ASIL-B functional safety requirements per ISO 26262. |
Use Scenario: Driving isolated IGBT or SiC MOSFET gate drivers in three-phase inverters where dv/dt exceeds 10 kV/µs. IC Role / Device Role / Timing Role: Provides 15 V isolated bias supply and isolates PWM enable/fault signals between controller and driver stage. Use Value: 25 kV/µs CMTI prevents false triggering during high-speed switching; 15 ns channel skew avoids shoot-through risk. |
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 | Wider input range (3.0–5.5 V), higher isolation rating (5000 V rms), 4 W output, but 24-lead SOIC package | Better suited for high-reliability medical or grid-tie inverter applications requiring higher working voltage margin | Select when >2500 V rms isolation or >2 W output is required; board layout must accommodate larger footprint |
| Si88442ED-IS | 4-channel isolator + integrated dc-dc (1.5 W), 25 Mbps, but no secondary-side regulation; uses capacitive isolation | Lacks closed-loop VISO regulation-output varies ±5% with load/line; requires external LDO for precision rails | Choose for cost-sensitive designs where ±5% VISO tolerance is acceptable and layout space allows extra regulator |
Compared with ADuM3472CRSZ, ADuM4472ARIZ offers higher isolation and power but increases PCB area and cost, while Si88442ED-IS reduces bill-of-materials count but sacrifices output voltage stability and noise performance critical for precision analog systems.
Availability
ADuM3472CRSZ is available at Aetrix Electronics and suitable for industrial fieldbus isolation, isolated sensor interfaces, and automotive battery management systems requiring stable component supply across multi-year production cycles.
Supply support for ADuM3472CRSZ 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 targets compact, certified isolated power + signal solutions for space-constrained industrial and automotive systems where regulatory compliance and reliability are mandatory.
FAQ
What output voltage ranges does the ADuM3472CRSZ support?
The ADuM3472CRSZ supports isolated output voltages from 3.3 V to 24 V, programmed via an external resistor divider on the FB pin. Its internal feedback reference is 1.25 V ±0.125 V, enabling precise regulation across all configurations including 5 V, 15 V, and 24 V outputs with ≤2% load regulation.
Does the ADuM3472CRSZ require an external transformer?
Yes, the ADuM3472CRSZ requires an external custom-wound transformer to implement the isolated dc-dc converter. It drives the primary winding with integrated MOSFETs and regulates the secondary output using feedback from the FB pin; transformer turns ratio and ET constant must be selected per Analog Devices' AN-1263 guidelines.
How does the ADuM3472CRSZ achieve secondary-side regulation without an optocoupler?
The ADuM3472CRSZ uses an iCoupler-based isolated feedback path: the secondary-side error amplifier drives an internal LED emulator, whose light signal is detected on the primary side by a photodiode, closing the regulation loop without optocoupler aging or temperature drift-enabling stable 5 V output with ±2% line/load regulation.
What safety certifications apply to the ADuM3472CRSZ?
The ADuM3472CRSZ carries UL 1577 (2500 V rms, 1 min), DIN EN IEC 60747-17 (VDE 0884-17, VIORM = 560 V peak), IEC/EN/CSA 62368-1, and IEC/CSA 61010-1 approvals. These confirm reinforced insulation suitable for functional safety applications up to 560 V peak working voltage.
Can the ADuM3472CRSZ operate with a 3.3 V primary supply?
Yes, the ADuM3472CRSZ supports 3.3 V primary operation (VDD1 = 3.0–3.6 V) and can generate 3.3 V isolated output delivering up to 250 mA at 70% efficiency. Input UVLO thresholds remain fixed at 2.6 V/2.8 V, ensuring robust start-up even with brownout conditions.
ADUM3472CRSZ 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:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2500Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 8ns
- 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
ADUM3472CRSZ FAQ
1.How can I place an order for ADUM3472CRSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3472CRSZ 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 ADUM3472CRSZ reliable?
The price and inventory of ADUM3472CRSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3472CRSZ is usually 5 days.
3.What payment methods are accepted for ADUM3472CRSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3472CRSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3472CRSZ?
ADUM3472CRSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3472CRSZ 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 ADUM3472CRSZ?
For technical support, including ADUM3472CRSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3472CRSZ requirements.
6.How does Aetrix verify that ADUM3472CRSZ is sourced from the original manufacturer or authorized distributors?
All ADUM3472CRSZ 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 ADUM3472CRSZ meets industry standards.
7.What is the process for return or replacement of ADUM3472CRSZ?
All ADUM3472CRSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3472CRSZ, 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 ADUM3472CRSZ part is unused and in its original packaging.
Return procedure for ADUM3472CRSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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