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Analog Devices Inc. ADUM3474WCRSZ
- Part No.:
- ADUM3474WCRSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3474WCRSZ.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,881
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Product details
Overview
ADUM3474WCRSZ 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 per channel, features 20-lead SSOP package, and operates up to 105°C - enabling compact, self-powered isolation in RS-485 transceivers and industrial field bus interfaces.
For engineers reviewing the ADUM3474WCRSZ datasheet, ADUM3474WCRSZ pinout, ADUM3474WCRSZ application, or ADUM3474WCRSZ equivalent, this page provides verified specifications, safety-certified insulation parameters, thermal shutdown behavior, soft-start timing, and real-world current delivery capability under 25 Mbps load conditions.
Technical Context
The ADUM3474WCRSZ integrates iCoupler® chip-scale transformers for signal isolation and a secondary-side-controlled transformer driver for high-efficiency isolated power generation. Its PWM controller supports adjustable oscillator frequency from 200 kHz to 1 MHz via external resistor, with pulse-by-pulse overcurrent protection and soft start at power-up.
All four isolation channels are rated for DC to 25 Mbps (C grade), with propagation delay ≤60 ns, pulse width distortion ≤8 ns, and common-mode transient immunity >25 kV/µs. The device implements reinforced insulation per DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 560 V peak and VISO = 2500 V rms for 1 minute.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Voltage | 2500 V rms for 1 minute - meets UL 1577 and enables reinforced insulation in safety-critical industrial systems |
| Output Power | 2 W max - sufficient to power external logic, gate drivers, or sensor circuitry without auxiliary supply |
| Data Rate | 25 Mbps per channel (C grade) - supports high-speed serial interfaces like isolated CAN FD or fast SPI |
| Efficiency | 70% at 400 mA / 5.0 V output - reduces thermal load and enables compact PCB layout in space-constrained designs |
| Operating Temp | −40°C to +105°C - qualified for automotive and industrial environments with extended temperature requirements |
| Common-Mode Immunity | >25 kV/µs - ensures robust operation in noisy motor drive or power converter applications |
| Package | 20-lead SSOP - surface-mount compatible with standard reflow profiles and IPC-compliant assembly |
Pinout & Package
ADUM3474WCRSZ uses a 20-lead shrink small-outline package (SSOP) with 0.65 mm lead pitch and exposed pad for thermal enhancement. Pin 1 is marked by a dot; pins 1–10 form the primary (input) side, pins 11–20 the secondary (output) side, with internal galvanic separation between domains.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply input | Accepts 3.0–5.5 V; powers internal logic and isolator input side |
| GND1 | Primary-side ground reference | Return path for VDD1 and input-side I/O; must be separated from GND2 |
| INA, INB, INC, IND | Input data channels A–D | CMOS-compatible inputs; VIH = 2.0 V (5 V supply), VIH = 1.6 V (3.3 V supply) |
| VDD2 | Secondary-side linear regulator output | 5.0 V ±10% regulated output; supplies internal secondary logic and optional external loads |
| GND2 | Secondary-side ground reference | Return path for VDD2, VISO, and output-side I/O; isolated from GND1 |
| VISO | Isolated dc-to-dc output | Adjustable 3.3–24 V output; delivers up to 400 mA at 5.0 V (70% efficiency) |
| FB | Feedback input for VISO regulation | Connects to resistor divider; sets VISO via VFB = 1.25 V (±10%) reference |
| ROC | Oscillator frequency control | Resistor-to-ground sets fSW from 200 kHz to 1 MHz; enables EMI optimization |
Key Features
| Feature | Design Value |
|---|---|
| Integrated transformer driver with secondary-side control | Enables higher efficiency than primary-side-controlled isolated supplies; eliminates need for optocoupler feedback loop |
| Pulse-by-pulse overcurrent protection | Detects and limits peak switch current during fault events - prevents transformer saturation and MOSFET failure |
| Soft start at power-up | Gradually ramps switching frequency and duty cycle to limit inrush current into output capacitors |
| Thermal shutdown with 20°C hysteresis | Shuts down at TJ ≥150°C and resumes only after cooling to ≤130°C - prevents cumulative thermal stress |
| Reinforced insulation per VDE 0884-17 | VIORM = 560 V peak certified; supports 2500 V rms withstand - meets IEC 62368-1 and IEC 61010-1 for functional safety |
Applications
| Industrial Field Bus Isolation | Isolated Sensor Interface |
|---|---|
Use Scenario: Galvanically isolating RS-485 transceivers in PLC backplanes or distributed I/O modules subject to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Provides both signal isolation (A/B/C/D channels) and local 5 V/3.3 V power for transceiver ICs - eliminating separate isolated DC/DC converters. Use Value: Reduces BOM count by one isolated power module; maintains 25 Mbps data integrity under >25 kV/µs transients. |
Use Scenario: Isolating analog front-end sensors (e.g., current shunt monitors, RTDs) in motor drives where high dv/dt noise couples across ground planes. IC Role / Device Role / Timing Role: Delivers clean, regulated VISO to sensor signal conditioning circuitry while transmitting digitized data across isolation barrier. Use Value: Enables single-chip solution for power + data isolation - avoids timing skew between isolated supply and data paths. |
| Automotive Battery Management | Power Supply Start-Up Bias |
Use Scenario: Monitoring cell voltages in high-voltage EV battery packs using isolated ADCs, requiring reinforced insulation and AEC-Q100 compliance. IC Role / Device Role / Timing Role: Supplies isolated 5 V bias to isolated ADCs and transmits status signals across barrier - qualified for automotive use per datasheet. Use Value: Meets reinforced insulation requirements (VIORM = 560 V peak) and operates reliably at 105°C ambient. |
Use Scenario: Providing initial gate drive voltage to high-side MOSFETs in offline SMPS before main transformer starts delivering power. IC Role / Device Role / Timing Role: Generates isolated 15 V output (via external transformer) to bootstrap gate drivers during startup phase. Use Value: Supports 15 V VISO configuration with 100 mA output - sufficient for typical high-side driver ICs during cold start. |
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 |
|---|---|---|---|
| ADUM4474ARIZ | Higher isolation rating (5000 V rms), wider temp range (−40°C to +125°C), same 20-lead SOIC package | Better suited for medical or harsh-environment designs requiring extended creepage/clearance and higher reliability margin | Select when system-level safety certification demands >2500 V rms withstand or operation above 105°C |
| SI88442ED-IS | 4-channel isolator + integrated DC/DC (1.5 W), 16-pin SOIC, lower max data rate (20 Mbps), no adjustable fSW | Compact footprint but limited output power and fixed oscillator; lacks ROC pin for EMI tuning | Choose for cost-sensitive, lower-power applications where 25 Mbps and programmable switching frequency are not required |
Compared with ADUM3474WCRSZ, ADUM4474ARIZ offers higher isolation and temperature margin at the expense of larger SOIC package and higher cost, while SI88442ED-IS trades programmability and output power for smaller size and lower price - making ADUM3474WCRSZ optimal for balanced performance in industrial automation.
Availability
ADUM3474WCRSZ is available at Aetrix Electronics and suitable for industrial field bus isolation, isolated sensor interfaces, automotive battery management, and power supply start-up bias applications requiring stable component supply and long-term lifecycle support.
Supply support for ADUM3474WCRSZ 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 semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision measurement and isolation-critical systems.
The ADuM347x product line delivers integrated isolated power and signal transfer for industrial, automotive, and energy infrastructure applications - designed to replace discrete optocouplers and standalone isolated DC/DC converters with a single-component solution.
FAQ
What output voltage configurations does ADUM3474WCRSZ support?
ADUM3474WCRSZ supports adjustable isolated output voltages from 3.3 V to 24 V via external resistor divider on the FB pin. Confirmed configurations include 3.3 V (250 mA), 5.0 V (400 mA), and 15 V (100 mA) outputs - all regulated with ±2% load regulation and 70% efficiency at full load per datasheet Tables 1–4.
Does ADUM3474WCRSZ require an external transformer?
Yes, ADUM3474WCRSZ requires an external custom-wound transformer to implement the isolated dc-to-dc converter. The device drives the primary winding; secondary rectification and regulation are handled externally. Transformer design guidelines - including turns ratio, ET constant, and isolation voltage - are provided in the datasheet Applications Information section.
What is the maximum data rate supported by ADUM3474WCRSZ?
ADUM3474WCRSZ supports up to 25 Mbps per channel under C-grade specifications (CL = 15 pF, CMOS levels). This is confirmed in Table 1 (Rev. C, p.4) and applies to all four channels simultaneously. At 25 Mbps, propagation delay is ≤60 ns and pulse width distortion is ≤8 ns.
How does the soft start function operate in ADUM3474WCRSZ?
The ADUM3474WCRSZ implements soft start by gradually increasing switching frequency and duty cycle at power-up to limit inrush current into output capacitors. This prevents voltage overshoot and mechanical stress on the external transformer, as described in the General Description and Applications Information sections of the datasheet.
Is ADUM3474WCRSZ qualified for automotive applications?
Yes, ADUM3474WCRSZ is explicitly qualified for automotive applications per the datasheet Automotive Products section (p.34) and carries relevant safety certifications including IEC/EN/CSA 62368-1 and DIN EN IEC 60747-17 (VDE 0884-17), supporting use in battery management and body electronics systems.
ADUM3474WCRSZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 0/4
- 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:
- Automotive
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 105°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
ADUM3474WCRSZ FAQ
1.How can I place an order for ADUM3474WCRSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3474WCRSZ 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 ADUM3474WCRSZ reliable?
The price and inventory of ADUM3474WCRSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3474WCRSZ is usually 5 days.
3.What payment methods are accepted for ADUM3474WCRSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3474WCRSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3474WCRSZ?
ADUM3474WCRSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3474WCRSZ 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 ADUM3474WCRSZ?
For technical support, including ADUM3474WCRSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3474WCRSZ requirements.
6.How does Aetrix verify that ADUM3474WCRSZ is sourced from the original manufacturer or authorized distributors?
All ADUM3474WCRSZ 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 ADUM3474WCRSZ meets industry standards.
7.What is the process for return or replacement of ADUM3474WCRSZ?
All ADUM3474WCRSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3474WCRSZ, 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 ADUM3474WCRSZ part is unused and in its original packaging.
Return procedure for ADUM3474WCRSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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