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Analog Devices Inc. ADUM4471CRIZ
- Part No.:
- ADUM4471CRIZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM4471CRIZ.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,203
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Product details
Overview
ADUM4471CRIZ from Analog Devices is a quad-channel digital isolator with integrated isolated DC-DC switching regulator, delivering up to 2.5 W output power at 5 V input, supporting adjustable isolated output voltages from 3.3 V to 24 V, and featuring 25 Mbps data rate per channel with 5000 Vrms isolation. It serves as a self-contained isolated power + signal interface in industrial gate drivers and sensor front-ends.
For engineers reviewing the ADUM4471CRIZ datasheet, ADUM4471CRIZ pinout, ADUM4471CRIZ application, or ADUM4471CRIZ equivalent, this device enables compact isolated bias supply generation with high-speed bidirectional signal transfer-critical for RS-485 transceivers, motor control feedback loops, and isolated ADC/DAC interfaces where space, efficiency, and noise immunity are constrained.
Technical Context
The ADUM4471CRIZ integrates a primary-side PWM controller with internal iCoupler® transformer-based feedback, eliminating external optocouplers and providing full loop compensation. Its regulated dc-to-dc stage supports 3.3 V–24 V isolated outputs across multiple input configurations (5 V/3.3 V primary), with soft-start, pulse-by-pulse overcurrent protection, and thermal shutdown.
All four isolation channels operate at up to 25 Mbps (CRIZ grade), with propagation delay ≤60 ns, PWD ≤8 ns, and CMTI >25 kV/µs. The device uses a 20-lead SOIC package with 8.3 mm creepage, enabling reinforced insulation compliance without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 Vrms - meets reinforced insulation requirements for industrial safety standards (IEC 60747-5-5, UL 1577). |
| Max Data Rate | 25 Mbps - supports high-speed serial protocols (e.g., SPI, UART) across isolation barrier without timing bottlenecks. |
| Isolated Output Power | Up to 2.5 W - sufficient to power secondary-side microcontrollers, gate drivers, or isolated transceivers without auxiliary supply. |
| Output Voltage Range | 3.3 V to 24 V - adjustable via external resistor divider on FB pin, enabling flexible system-level voltage rail design. |
| Switching Frequency | 200 kHz to 1 MHz - programmable via ROC resistor; higher frequencies reduce transformer size, lower frequencies improve EMI. |
| CMTI | >25 kV/µs - ensures reliable operation in noisy motor drive or power converter environments with fast dv/dt transients. |
| Package | 20-lead SOIC wide-body - provides 8.3 mm creepage and clearance, certified for reinforced isolation per DIN V VDE V 0884-10. |
Pinout & Package
ADUM4471CRIZ uses a 20-lead SOIC package (SOIC_W) with 8.3 mm creepage distance, rated for 105°C operation and certified for reinforced insulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power input (transformer driver) | Supplies push-pull MOSFET driver; accepts 3.3 V or 5 V nominal input. |
| VDDA | Primary-side logic supply | Powers side-1 I/O buffers and controller logic; independent of VDD1. |
| GND1 | Primary-side ground reference | Return path for VDD1 and VDDA; galvanically separated from GND2. |
| I/OA–I/OD | Primary-side digital input/output terminals | Four unidirectional or bidirectional CMOS-compatible channels (configurable per datasheet). |
| VISO | Isolated secondary-side output voltage | Regulated output (3.3–24 V) derived from internal DC-DC; powers secondary circuitry. |
| VDD2 | Secondary-side logic supply | Internal LDO output (5 V) derived from VISO; powers side-2 I/O buffers. |
| GND2 | Secondary-side ground reference | Return path for VISO and VDD2; isolated from GND1 by transformer and iCoupler barriers. |
| FB | Feedback voltage sense input | Connects to resistor divider on VISO to set output voltage; internal 1.25 V reference. |
| OC | Overcurrent fault indicator | Open-drain output asserting low during pulse-by-pulse current limit event. |
| REG | Internal LDO enable/control | Configures VDD2 regulation; tied high to enable 5 V LDO from VISO. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC + quad isolator | Eliminates need for separate isolated power IC and digital isolators-reduces BOM count and PCB area by ~40% vs discrete solution. |
| iCoupler® transformer-based feedback | Replaces optocoupler-based feedback loops with on-chip chip-scale transformers, enabling stable regulation without external compensation components. |
| 25 Mbps per channel (CRIZ grade) | Enables real-time control signaling (e.g., PWM, encoder, SPI) across isolation barrier with sub-60 ns propagation delay and <8 ns pulse distortion. |
| Programmable switching frequency (200 kHz–1 MHz) | Allows optimization of transformer size, efficiency, and EMI profile-ROC resistor sets frequency without external clock source. |
| Soft-start and thermal shutdown | Prevents inrush current damage during power-up; thermal shutdown disables switching above 150°C junction temperature. |
| High CMTI (>25 kV/µs) | Ensures robust data integrity in high-noise environments such as variable-frequency drives and industrial PLC I/O modules. |
Applications
| Power Supply Start-Up Bias | Isolated Sensor Interface |
|---|---|
|
Use Scenario: Providing initial gate drive and controller bias for isolated half-bridge inverters before main DC bus is established. IC Role / Device Role / Timing Role: ADUM4471CRIZ delivers regulated 15 V isolated output to bootstrap gate drivers while simultaneously isolating PWM signals from MCU. Use Value: Enables safe, self-powered start-up without auxiliary windings or external bias supplies-reducing transformer complexity and cost. |
Use Scenario: Interfacing isolated current/voltage sensors in motor phase legs to a central controller across 1 kV potential difference. IC Role / Device Role / Timing Role: ADUM4471CRIZ provides both isolated 5 V supply for sensor electronics and 25 Mbps SPI isolation for digitized readings. Use Value: Eliminates ground loops and common-mode noise corruption while maintaining sub-microsecond timing alignment between channels. |
| Process Control I/O Module | RS-485 Transceiver Isolation |
|
Use Scenario: Digitally isolating analog input/output channels in PLC backplanes operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: ADUM4471CRIZ powers isolated ADC/DAC front-ends and transfers configuration/status data across isolation barrier at 10 Mbps. Use Value: Achieves >25 kV/µs CMTI and 5000 Vrms isolation-meeting IEC 61000-4-5 surge and IEC 61000-4-4 EFT immunity requirements. |
Use Scenario: Isolating RS-485 transceivers in distributed industrial networks with long cable runs and ground potential differences. IC Role / Device Role / Timing Role: ADUM4471CRIZ supplies isolated 3.3 V to MAX1487E transceiver and isolates TX/RX/DE/RE control lines with matched propagation delay. Use Value: Prevents ground-loop currents from disrupting differential signaling while maintaining full 25 Mbps data throughput and timing coherence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated power + signal interface applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4472CRIZ | Same architecture, but with two forward + two reverse channel direction configuration (vs. ADUM4471CRIZ's three forward + one reverse). | Better suited for bidirectional protocols like I²C or half-duplex UART where asymmetric channel direction is required. | Select ADUM4472CRIZ when channel direction matching to protocol flow (e.g., master/slave I²C) is critical; pinout differs. |
| SI88642ED-IS | 4-channel isolator + isolated DC-DC (1.5 W max), 10 Mbps max data rate, 3750 Vrms isolation, SOIC-20 package. | Limited to lower data rates and output power; lacks programmable oscillator and soft-start. | Choose SI88642ED-IS only if 10 Mbps suffices and 1.5 W isolated supply meets load requirements-lower cost but reduced flexibility. |
Compared with ADUM4472CRIZ and SI88642ED-IS, the ADUM4471CRIZ offers superior 25 Mbps speed, 2.5 W power delivery, and full internal loop compensation-making it optimal for high-fidelity motor control feedback and fast serial interfaces where timing precision and power autonomy are essential.
Availability
ADUM4471CRIZ is available at Aetrix Electronics and suitable for industrial motor drives, isolated sensor systems, and RS-485 network nodes requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for ADUM4471CRIZ 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, headquartered in Norwood, MA.
The ADuM447x family was designed to replace optocoupler-based isolated power and signal solutions in industrial automation, energy systems, and medical equipment-delivering higher reliability, smaller footprint, and faster data rates.
FAQ
What is the maximum isolated output power supported by ADUM4471CRIZ?
ADUM4471CRIZ supports up to 2.5 W of isolated output power when operated with a 5 V primary input supply. This rating applies across its full 3.3 V to 24 V adjustable output range, verified under thermal limits and 105°C ambient conditions. The actual deliverable current depends on output voltage and data rate loading-e.g., 393 mA available at 3.3 V output with all channels running at 25 Mbps.
Does ADUM4471CRIZ require external compensation components for its DC-DC regulator?
No, ADUM4471CRIZ includes fully integrated loop compensation for its isolated DC-DC controller. The internal iCoupler® transformer-based feedback eliminates the need for external optocouplers, TL431 shunt regulators, or compensation networks-reducing design complexity and component count while ensuring stability across line/load/temperature.
How does the channel direction configuration of ADUM4471CRIZ differ from other ADuM447x variants?
ADUM4471CRIZ has three forward-direction (VDDA → GND2) and one reverse-direction (GND2 → VDDA) isolation channels. This configuration optimizes it for applications like isolated gate drivers with three control signals and one feedback channel. Other variants-e.g., ADUM4472CRIZ-offer two forward/two reverse, and ADUM4474CRIZ provides four reverse-only channels.
Can ADUM4471CRIZ operate with a 3.3 V primary input supply?
Yes, ADUM4471CRIZ supports 3.3 V primary input operation (VDD1 = VDDA = 3.0 V to 3.6 V), delivering up to 250 mA at 3.3 V isolated output. Efficiency drops slightly versus 5 V input (68% vs. 72%), and maximum output power is reduced to ~0.8 W. All timing specs-including 25 Mbps data rate and 30 ns propagation delay-remain valid.
What safety certifications apply to ADUM4471CRIZ?
ADUM4471CRIZ is certified for 5000 Vrms reinforced isolation per UL 1577 and DIN V VDE V 0884-10 (VDE V 0884-10). It meets creepage and clearance requirements for 20-lead SOIC wide-body packaging (8.3 mm minimum creepage), supporting end-equipment compliance with IEC 61800-5-1 (drives) and IEC 61010-1 (test equipment).
ADUM4471CRIZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- IsoPower®, iCoupler®
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 60ns, 60ns
- Pulse Width Distortion (Max):
- 6ns
- 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-SOIC-IC
ADUM4471CRIZ FAQ
1.How can I place an order for ADUM4471CRIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM4471CRIZ 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 ADUM4471CRIZ reliable?
The price and inventory of ADUM4471CRIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM4471CRIZ is usually 5 days.
3.What payment methods are accepted for ADUM4471CRIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM4471CRIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM4471CRIZ?
ADUM4471CRIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM4471CRIZ 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 ADUM4471CRIZ?
For technical support, including ADUM4471CRIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM4471CRIZ requirements.
6.How does Aetrix verify that ADUM4471CRIZ is sourced from the original manufacturer or authorized distributors?
All ADUM4471CRIZ 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 ADUM4471CRIZ meets industry standards.
7.What is the process for return or replacement of ADUM4471CRIZ?
All ADUM4471CRIZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM4471CRIZ, 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 ADUM4471CRIZ part is unused and in its original packaging.
Return procedure for ADUM4471CRIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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