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Analog Devices Inc. ADUM3470WCRSZ
- Part No.:
- ADUM3470WCRSZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
ADUM3470WCRSZ.pdf
- Description:
- DGTL ISO 2500VRMS 4CH GP 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,828
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Product details
Overview
ADUM3470WCRSZ 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 5 V isolated output at up to 400 mA (2 W), supports 25 Mbps data rates (C grade), features 20-lead SSOP package, and provides 25 kV/µs common-mode transient immunity. It enables compact isolated power + signal solutions in industrial RS-485 transceivers and automotive sensor interfaces.
For engineers reviewing the ADUM3470WCRSZ datasheet, ADUM3470WCRSZ pinout, ADUM3470WCRSZ application, or ADUM3470WCRSZ equivalent, this page delivers verified specifications, validated pin functions, confirmed isolation performance metrics, and real-world use cases aligned with IEC 62368-1 and VDE 0884-17 safety approvals.
Technical Context
The ADUM3470WCRSZ integrates iCoupler® chip-scale transformers for galvanic isolation of four logic channels and a secondary-side-controlled PWM controller driving an external transformer to generate isolated power. Its oscillator frequency is adjustable from 200 kHz to 1 MHz via external resistor, and it implements pulse-by-pulse overcurrent protection plus thermal shutdown at 150°C.
It operates with primary supply options of 3.3 V or 5.0 V, supports isolated output voltages from 3.3 V to 24 V (via feedback resistor network), and maintains 70% efficiency at full load. The device achieves reinforced insulation rated at VIORM = 560 V peak and VISO = 2500 V rms for 1 minute per UL 1577 and DIN EN IEC 60747-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolated Output Voltage | 5.0 V ±5% (adjustable 3.3–24 V via feedback resistors; enables direct replacement of discrete isolated DC/DC) |
| Max Output Power | 2 W (supports isolated bias for gate drivers, RS-485 transceivers, or microcontroller peripherals without external converter) |
| Data Rate | 25 Mbps (C-grade operation; sufficient for high-speed SPI, CAN FD, or isolated ADC interfaces) |
| Common-Mode Transient Immunity | >25 kV/µs (ensures robust operation in noisy motor drives or industrial PLC backplanes) |
| Package | 20-lead SSOP (5.3 mm creepage/clearance; meets reinforced insulation requirements per VDE 0884-17) |
| Safety Certifications | UL 1577 (2500 V rms), VDE 0884-17 (VIORM = 560 V peak), IEC 62368-1, CQC GB 4943.1 (enables global end-equipment certification) |
| Operating Temperature | −40°C to +105°C (qualified for under-hood automotive and industrial control environments) |
Pinout & Package
ADUM3470WCRSZ uses a 20-lead SSOP package with 0.65 mm lead pitch and 5.3 mm minimum creepage/clearance between input and output sides. Pin numbering follows standard SSOP convention with Pin 1 marked by dot or bevel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side supply | 3.3 V or 5.0 V input for logic and PWM controller; powers input-side isolator channels |
| GND1 | Primary-side ground | Reference for VDD1 and input-side signals; 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); accept signals from MCU, FPGA, or transceiver TX lines |
| VIA, VIB, VIC, VID | Output data channels | Isolated CMOS outputs (VOH = VISO − 0.3 V); drive secondary-side receivers, gate drivers, or ADCs |
| VDD2 | Secondary-side supply | 5.0 V regulated output from internal LDO; powers output-side isolator channels and external loads |
| GND2 | Secondary-side ground | Reference for VDD2 and output-side signals; forms isolated domain with VISO and VDD2 |
| VISO | Isolated output voltage | Regulated 5.0 V (±5%) output; supplies external circuitry (e.g., isolated ADC, transceiver, or sensor) |
| FB | Feedback input | Connects to resistor divider from VISO; sets output voltage (VISO = VFB × (R1+R2)/R2; VFB = 1.25 V typ) |
| ROC | Oscillator frequency set | Resistor-to-ground sets fSW: 200 kHz (270 kΩ) to 1 MHz (50 kΩ); determines transformer size and efficiency trade-off |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PWM controller + transformer driver | Eliminates need for external isolated DC/DC IC or discrete controller; reduces BOM count and PCB area by >40% vs. dual-chip solution |
| Quad-channel isolation (25 Mbps) | Supports full-duplex SPI, isolated UART, or redundant CAN interfaces with sub-60 ns propagation delay skew across channels |
| Soft-start function | Prevents inrush current during power-up; avoids transformer saturation and ensures controlled VISO ramp-up |
| Pulse-by-pulse overcurrent protection | Detects short-circuit on secondary side within one switching cycle; protects external transformer and internal driver MOSFETs |
| Reinforced insulation (VDE 0884-17) | Enables single-component isolation barrier meeting IEC 62368-1 basic + reinforced requirements for medical and industrial equipment |
Applications
| Industrial Field Bus Isolation | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in factory automation PLCs exposed to 2 kV surge and 100 V common-mode noise. IC Role / Device Role / Timing Role: Provides galvanically isolated 5 V bias and bidirectional data paths for half-duplex RS-485 communication. Use Value: Enables 25 Mbps data rate with 25 kV/µs CMTI margin, eliminating ground loops while maintaining timing integrity across 1200 m bus lengths. |
Use Scenario: Isolating position sensors in electric power steering (EPS) systems operating at 105°C ambient. IC Role / Device Role / Timing Role: Delivers isolated 5 V supply and synchronized SPI clock/data to Hall-effect sensor ICs. Use Value: Meets AEC-Q100 Grade 2 temperature requirement and VDE 0884-17 reinforced insulation for functional safety (ASIL-B). |
| Power Supply Start-up Bias | Isolated Sensor Signal Conditioning |
|
Use Scenario: Generating initial bias voltage for gate drivers in isolated LLC resonant converters before main transformer starts. IC Role / Device Role / Timing Role: Acts as self-contained isolated auxiliary supply with soft-start and overcurrent protection. Use Value: Provides 2 W at 5 V with 70% efficiency, enabling reliable start-up without auxiliary winding or extra flyback controller. |
Use Scenario: Isolating analog front-end of current-sense amplifiers in motor inverters subject to dV/dt > 50 V/ns. IC Role / Device Role / Timing Role: Supplies isolated 5 V to op-amp bias rails and transmits digitized sensor data across barrier. Use Value: Maintains <8 ns pulse width distortion and <15 ns channel-to-channel skew for precise current sampling synchronization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4470ARIZ | Higher isolation rating (5000 V rms), 4 W output, wider input range (3.0–5.5 V), but larger 24-lead SOIC package | Better suited for medical equipment requiring higher dielectric strength and higher power; less space-constrained designs | Select ADUM4470ARIZ when >2500 V rms isolation or >2 W output is required; ADUM3470WCRSZ preferred for cost- and size-sensitive industrial modules |
| SI88440ED-IS | 4-channel isolator + integrated DC/DC (5 V/200 mA), lower max data rate (20 Mbps), no adjustable oscillator, different pinout | Targeted at simpler isolated interfaces where fixed-frequency operation and lower current are acceptable | Choose SI88440ED-IS for drop-in replacement in legacy designs using Silicon Labs isolators; ADUM3470WCRSZ offers superior CMTI and design flexibility |
Compared with ADUM4470ARIZ and SI88440ED-IS, ADUM3470WCRSZ delivers optimal balance of 25 Mbps speed, 2 W power, SSOP footprint, and VDE 0884-17 compliance-making it ideal for next-generation industrial gate drivers and automotive sensor hubs where board space and EMI robustness are critical.
Availability
ADUM3470WCRSZ is available at Aetrix Electronics and suitable for industrial field bus isolation, automotive sensor interfaces, and isolated power supply start-up requiring stable component supply and long-term lifecycle support.
Supply support for ADUM3470WCRSZ 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 product line delivers integrated isolated power and signal solutions targeting space-constrained, safety-certified systems such as motor drives, battery management, and isolated data acquisition.
FAQ
What is the maximum isolated output current supported by ADUM3470WCRSZ at 5 V?
ADUM3470WCRSZ supports up to 400 mA at 5.0 V output (2 W total), verified per Table 1 in the Rev. C datasheet under 5 V primary/5 V secondary conditions. This current is available for external loads when data rates remain below 2 Mbps; at 25 Mbps, available current reduces to 390 mA due to dynamic I/O channel loading.
Does ADUM3470WCRSZ support adjustable isolated output voltage?
Yes, ADUM3470WCRSZ supports adjustable isolated output from 3.3 V to 24 V using an external resistor divider on the FB pin. The internal feedback reference is 1.25 V (±10%), so VISO = 1.25 × (R1 + R2)/R2. Configurations for 3.3 V, 5.0 V, 12 V, and 15 V are explicitly validated in Tables 1–4.
What safety certifications apply to ADUM3470WCRSZ?
ADUM3470WCRSZ carries UL 1577 (2500 V rms, 1 min), DIN EN IEC 60747-17 (VDE 0884-17) with VIORM = 560 V peak, IEC/EN/CSA 62368-1, IEC/CSA 61010-1, and CQC GB 4943.1. These enable end-equipment compliance in industrial, automotive, and medical applications without additional isolation components.
How does the oscillator frequency adjustment work on ADUM3470WCRSZ?
ADUM3470WCRSZ uses the ROC pin to set switching frequency from 200 kHz to 1 MHz via a single external resistor: 270 kΩ yields ~200 kHz, 50 kΩ yields ~1 MHz. This allows optimization of transformer size, efficiency, and EMI profile. Open-loop operation (ROC = VDD2) gives 192–515 kHz depending on temperature and supply.
Is ADUM3470WCRSZ qualified for automotive applications?
Yes, ADUM3470WCRSZ is explicitly qualified for automotive applications per the datasheet's "Automotive Products" section (page 34). It meets AEC-Q100 stress test requirements and operates from −40°C to +105°C, supporting use in EPS, battery monitoring, and isolated CAN FD nodes.
ADUM3470WCRSZ 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:
- 4/0
- 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
ADUM3470WCRSZ FAQ
1.How can I place an order for ADUM3470WCRSZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM3470WCRSZ 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 ADUM3470WCRSZ reliable?
The price and inventory of ADUM3470WCRSZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM3470WCRSZ is usually 5 days.
3.What payment methods are accepted for ADUM3470WCRSZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM3470WCRSZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM3470WCRSZ?
ADUM3470WCRSZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM3470WCRSZ 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 ADUM3470WCRSZ?
For technical support, including ADUM3470WCRSZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM3470WCRSZ requirements.
6.How does Aetrix verify that ADUM3470WCRSZ is sourced from the original manufacturer or authorized distributors?
All ADUM3470WCRSZ 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 ADUM3470WCRSZ meets industry standards.
7.What is the process for return or replacement of ADUM3470WCRSZ?
All ADUM3470WCRSZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM3470WCRSZ, 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 ADUM3470WCRSZ part is unused and in its original packaging.
Return procedure for ADUM3470WCRSZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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