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Analog Devices Inc. ADUM4471ARIZ
- Part No.:
- ADUM4471ARIZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM4471ARIZ.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,988
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Product details
Overview
ADUM4471ARIZ 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 regulated isolated output voltages from 3.3 V to 24 V, featuring 5000 Vrms isolation and 20-lead SOIC package with 8.3 mm creepage - used in isolated RS-485 transceivers and industrial process control power interfaces.
For engineers reviewing the ADUM4471ARIZ datasheet, ADUM4471ARIZ pinout, ADUM4471ARIZ application, or ADUM4471ARIZ equivalent, this page delivers verified technical context, real-world design meaning for key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to ADUM4471ARIZ's dual-role as isolated regulator + signal isolator.
Technical Context
The ADUM4471ARIZ integrates a primary-side transformer driver with internal PWM feedback loop compensation using iCoupler® chip-scale transformers, eliminating external optocouplers while maintaining loop stability across load and line variations. Its secondary-side controller regulates output voltage via feedback through an isolated channel, enabling precise VISO setpoint control.
It provides four independent unidirectional isolation channels (A–D) rated for DC–1 Mbps data rate in ARIZ grade, with propagation delay ≤100 ns and common-mode transient immunity >25 kV/µs. The device supports multiple input/output voltage configurations including 5 VIN/5 VISO, 5 VIN/3.3 VISO, and 5 VIN/15 VISO, with soft-start, pulse-by-pulse overcurrent protection, and thermal shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 Vrms - enables reinforced insulation for safety-critical industrial and medical applications per IEC 60601 and IEC 61000-4-5. |
| Max Output Power | 2.5 W - sufficient to power isolated gate drivers, ADCs, or RS-485 transceivers without external DC-DC stages. |
| Regulated VISO Range | 3.3 V to 24 V - configurable via external resistor divider on FB pin, supporting diverse downstream logic and analog circuitry. |
| Data Rate (ARIZ) | 1 Mbps - suitable for isolated CAN, SPI, and slow serial interfaces where timing margin and noise immunity outweigh speed needs. |
| Efficiency | Up to 80% - reduces heat generation and improves system-level power budget versus unregulated isolated supplies. |
| CM Transient Immunity | >25 kV/µs - ensures reliable operation in high-noise motor drives and factory automation environments. |
| Package | 20-lead SOIC wide-body - provides 8.3 mm creepage distance required for reinforced isolation in 300 VRMS working voltage systems. |
Pinout & Package
ADUM4471ARIZ uses a 20-lead SOIC package (body width 10.3 mm, creepage 8.3 mm), compliant with RoHS and halogen-free standards. Pin numbering follows standard SOIC convention with Pin 1 marked by dot or notch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side transformer driver supply | Connects to 4.5–5.5 V input; powers internal MOSFET driver and primary-side logic; must be decoupled near pin. |
| VDDA | Primary-side isolator logic supply | Supplies side-1 I/O buffers (CHA–CHD inputs); shares rail with VDD1 in most designs but may be separated for noise isolation. |
| GND1 | Primary-side reference ground | Return path for VDD1 and VDDA; must be partitioned from GND2 to maintain isolation barrier integrity. |
| CHA–CHD | Primary-side input channels | Unidirectional CMOS-compatible inputs accepting 0.8 V / 2.0 V thresholds; drive internal iCoupler transformers. |
| I/OA–I/OD | Secondary-side output channels | CMOS outputs referenced to VISO/GND2; drive loads up to 4 mA; VOH/VOL specified at ±4 mA. |
| VISO | Isolated regulated output | Provides adjustable 3.3–24 V output; current capability depends on configuration (e.g., 390 mA @ 5 VOUT, 5 VIN). |
| FB | Feedback voltage sense | Connects to resistor divider from VISO; sets output via internal 1.25 V reference; enables precise regulation without optocoupler. |
| REG | Internal linear regulator output | Provides fixed 5 V output (VDD2) for secondary-side logic when VISO ≥ 7 V; dropout ≤1.5 V at 50 mA. |
| GND2 | Secondary-side reference ground | Return for VISO, REG, and I/OA–I/OD; galvanically isolated from GND1; critical for noise rejection and safety compliance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC + quad isolator | Reduces BOM count by replacing separate isolated power module + 4-channel digital isolator, saving PCB area and simplifying layout. |
| iCoupler® transformer-based isolation | Eliminates LED aging and CTR drift of optocouplers, ensuring stable timing and long-term reliability in 10+ year deployments. |
| Internal PWM feedback with loop compensation | Enables stable regulation without external compensation components - simplifies design and avoids instability risks from layout parasitics. |
| Pulse-by-pulse overcurrent protection | Detects short-circuit or overload on VISO within one switching cycle, preventing transformer saturation and MOSFET failure. |
| Soft-start function | Controls inrush current during power-up, limiting stress on input capacitors and upstream regulators in multi-rail systems. |
Applications
| Power Supply Start-Up Bias | Isolated Sensor Interface |
|---|---|
|
Use Scenario: Providing initial bias power to isolated gate drivers before main converter starts. IC Role / Device Role / Timing Role: ADUM4471ARIZ acts as self-contained isolated auxiliary supply and level-shifting interface, powering driver ICs and relaying enable/status signals. Use Value: Enables zero-crossing startup sequencing in IGBT/SiC inverters without external bias winding or discrete isolators. |
Use Scenario: Isolating analog sensor outputs (e.g., current shunt, RTD) in high-voltage motor control cabinets. IC Role / Device Role / Timing Role: ADUM4471ARIZ supplies isolated power to signal-conditioning op-amps and transmits digitized data across barrier via CHA–CHD. Use Value: Maintains 5000 Vrms withstand while delivering clean 3.3 V/5 V power and low-jitter 1 Mbps data transfer. |
| Process Control Loop | RS-485 Transceiver Bias |
|
Use Scenario: Powering and isolating PLC I/O modules in hazardous-area fieldbus networks. IC Role / Device Role / Timing Role: ADUM4471ARIZ provides isolated VISO for local microcontroller and digital I/O, while routing control commands bidirectionally across isolation barrier. Use Value: Meets IEC 61000-6-2/6-4 immunity requirements and eliminates ground loops in distributed 4–20 mA loop systems. |
Use Scenario: Supplying isolated power and signal isolation to half-duplex RS-485 transceivers in factory automation nodes. IC Role / Device Role / Timing Role: ADUM4471ARIZ delivers regulated 5 V to MAX1487-type transceivers and isolates DE/RE and RO/DI lines. Use Value: Achieves full 5000 Vrms system-level isolation without external DC-DC, reducing component count and EMI sources. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated regulator + digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4472ARIZ | Same package and isolation rating, but includes two reverse-direction channels (CHC/CHD bidirectional) vs. ADUM4471ARIZ's four unidirectional channels. | Better suited for bidirectional protocols like I²C or SMBus where clock/data direction reverses; less optimal for pure unidirectional SPI/CAN. | Select ADUM4472ARIZ only if bidirectional channel flexibility is required; otherwise ADUM4471ARIZ offers lower quiescent current (15 mA vs. 16 mA at 5 VIN/5 VISO). |
| ADUM4473ARIZ | Identical architecture and pinout, but rated for DC–2 Mbps data rate and higher VISO load current (384 mA @ 5 VOUT) due to optimized internal driver strength. | Supports faster isolated communication (e.g., high-speed SPI up to 2 Mbps) and heavier VISO loads, at cost of slightly higher IDD1 (17 mA vs. 15 mA). | Choose ADUM4473ARIZ when system requires >1 Mbps data throughput or >390 mA VISO current; ADUM4471ARIZ remains optimal for cost-sensitive 1 Mbps designs. |
Compared with ADUM4472ARIZ and ADUM4473ARIZ, the ADUM4471ARIZ delivers the lowest quiescent current among the ARIZ-grade family while maintaining full 1 Mbps capability and 390 mA VISO output - making it ideal for power-constrained isolated interfaces where unidirectional signaling suffices.
Availability
ADUM4471ARIZ is available at Aetrix Electronics and suitable for industrial process controls, isolated RS-485 nodes, and power supply start-up bias circuits requiring stable component supply, long-lifecycle availability, and certified 5000 Vrms isolation.
Supply support for ADUM4471ARIZ 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 is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets with precision, reliability, and innovation.
The ADUM447x family was designed to replace optocoupler-based isolated power and signal interfaces in industrial automation, offering integrated regulation, robust iCoupler isolation, and simplified system-level certification - targeting space-constrained, high-reliability applications.
FAQ
What is the maximum isolated output voltage supported by ADUM4471ARIZ?
ADUM4471ARIZ supports an isolated output voltage range of 3.3 V to 24 V, set via external resistor divider on the FB pin using the internal 1.25 V reference. This range is confirmed across all input configurations (5 VIN, 3.3 VIN) and applies directly to ADUM4471ARIZ per Table 1–4 in the Rev. 0 datasheet.
Does ADUM4471ARIZ require external compensation components for its DC-DC regulator?
No, ADUM4471ARIZ includes fully integrated PWM feedback with internal loop compensation. The device eliminates the need for external compensation networks, as stated in the General Description: "internal isolated PWM feedback… with complete loop compensation." This design feature is inherent to ADUM4471ARIZ and reduces design complexity and component count.
What is the data rate capability of ADUM4471ARIZ, and how does it differ from CRIZ-grade variants?
ADUM4471ARIZ is rated for DC to 1 Mbps data rate with minimum pulse width of 1000 ns, as specified in the AC Characteristics table for ARIZ grade. In contrast, CRIZ-grade variants (e.g., ADUM4471CRIZ) support up to 25 Mbps. This 1 Mbps limit is a defined characteristic of ADUM4471ARIZ and not a derated value.
Can ADUM4471ARIZ power external circuitry from its VISO output?
Yes, ADUM4471ARIZ provides usable VISO current for external loads: up to 390 mA at 5 VOUT (5 VIN), 244 mA at 3.3 VOUT (3.3 VIN), and 91 mA at 15 VOUT (5 VIN). These values are explicitly listed in Tables 1–4 under "Available VISO Supply Current" and apply to ADUM4471ARIZ.
What isolation certifications does ADUM4471ARIZ meet?
ADUM4471ARIZ is rated for 5000 Vrms isolation per UL 1577 and features high common-mode transient immunity (>25 kV/µs), meeting requirements for reinforced insulation in industrial systems. Regulatory approvals are pending per the datasheet's "Regulatory Approvals (Pending)" section, and no other isolation certifications (e.g., VDE, CQC) are claimed for ADUM4471ARIZ in the provided documentation.
ADUM4471ARIZ 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:
- 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-SOIC-IC
ADUM4471ARIZ FAQ
1.How can I place an order for ADUM4471ARIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM4471ARIZ 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 ADUM4471ARIZ reliable?
The price and inventory of ADUM4471ARIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM4471ARIZ is usually 5 days.
3.What payment methods are accepted for ADUM4471ARIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM4471ARIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM4471ARIZ?
ADUM4471ARIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM4471ARIZ 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 ADUM4471ARIZ?
For technical support, including ADUM4471ARIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM4471ARIZ requirements.
6.How does Aetrix verify that ADUM4471ARIZ is sourced from the original manufacturer or authorized distributors?
All ADUM4471ARIZ 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 ADUM4471ARIZ meets industry standards.
7.What is the process for return or replacement of ADUM4471ARIZ?
All ADUM4471ARIZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM4471ARIZ, 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 ADUM4471ARIZ part is unused and in its original packaging.
Return procedure for ADUM4471ARIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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