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Analog Devices Inc. ADUM4474ARIZ
- Part No.:
- ADUM4474ARIZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM4474ARIZ.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
ADUM4474ARIZ 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 and supporting 3.3–24 V regulated isolated output. It features 5000 Vrms isolation, 20-lead SOIC package with 8.3 mm creepage, and built-in PWM feedback with internal compensation-enabling optocoupler-free isolated power supply design for gate drives and sensor interfaces.
For engineers reviewing the ADUM4474ARIZ datasheet, ADUM4474ARIZ pinout, ADUM4474ARIZ application, or ADUM4474ARIZ equivalent, this device serves as a single-chip solution combining high-speed signal isolation (1 Mbps), isolated power regulation, thermal shutdown, pulse-by-pulse overcurrent protection, and high common-mode transient immunity (>25 kV/µs) in industrial and process control systems.
Technical Context
The ADUM4474ARIZ integrates a primary-side transformer driver, secondary-side controller, and four independent iCoupler® isolation channels using chip-scale transformer technology. Its isolated PWM feedback loop eliminates external optocouplers and provides full internal loop compensation for stable regulation across load and line variations.
It supports adjustable oscillator frequency (200 kHz–1 MHz), soft-start at power-up, and operates with input voltages of 3.3 V or 5.0 V to generate isolated outputs from 3.3 V to 24 V. The device delivers up to 400 mA available VISO supply current under 5 VIN/5 VISO conditions at 1 Mbps data rate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 Vrms - enables reinforced insulation per IEC 60747-5-2 in safety-critical industrial power supplies. |
| Max Output Power | 2.5 W - sufficient to power isolated gate drivers, RS-485 transceivers, or small microcontrollers without external DC-DC stages. |
| Regulated Output Range | 3.3 V to 24 V - configurable via external resistor divider on FB pin, supporting diverse downstream voltage requirements. |
| Data Rate | 1 Mbps - validated for reliable NRZ communication in motor control feedback, PLC I/O, and isolated sensor links. |
| Common-Mode Transient Immunity | >25 kV/µs - ensures robust operation in noisy industrial environments with fast-switching power electronics. |
| Package | 20-lead SOIC wide-body - provides 8.3 mm creepage distance for enhanced safety compliance in high-voltage applications. |
| Efficiency | Up to 80% - reduces thermal load and improves system-level power density compared to unregulated isolated supplies. |
| Protection Features | Pulse-by-pulse overcurrent + thermal shutdown - prevents damage during short-circuit or overload events without external circuitry. |
Pinout & Package
ADUM4474ARIZ uses a 20-lead SOIC wide-body package (package code ARIZ) with 8.3 mm creepage and reinforced insulation. Pin functions are defined per the ADuM447x family pin configuration diagram (Figure 15, Rev. 0 datasheet).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side power supply | Input for transformer driver; accepts 3.3 V or 5.0 V; powers side 1 logic and driver stage. |
| VDDA | Side 1 logic supply | Provides power to channel A–D input buffers and transmitter circuits on primary side. |
| GND1 | Primary-side ground reference | Return path for VDD1 and VDDA; galvanically separated from secondary-side ground. |
| CHA–CHD | Primary-side channel inputs | Digital inputs for four isolated signal paths; CMOS-compatible thresholds (VIH = 2.0 V, VIL = 0.8 V). |
| I/OA–I/OD | Secondary-side channel outputs | CMOS outputs referenced to VDD2/GND2; drive capability up to 4 mA sink/source per channel. |
| VDD2 | Secondary-side logic supply | Internal linear regulator output (5 V); powers side 2 logic; requires external 5 V or 15 V VREG input. |
| VREG | Secondary-side regulator input | Accepts 5 V or 15 V input to feed internal LDO generating VDD2; decoupling required per datasheet. |
| VISO | Isolated DC-DC output | Regulated, adjustable output (3.3–24 V); used to power external loads or secondary-side circuitry. |
| FB | Feedback voltage sense | Connects to resistor divider from VISO; sets output voltage via internal 1.25 V reference (VFB = 1.25 V typ). |
| OC | Overcurrent fault indicator | Open-drain output asserted low during overcurrent event; used for system-level fault signaling or latch reset. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC controller | Eliminates need for external transformer driver IC and optocoupler-based feedback, reducing BOM count and layout complexity. |
| Built-in PWM feedback with compensation | Enables stable closed-loop regulation without external compensation components-reducing design iteration time. |
| Quad-channel isolation (1 Mbps) | Supports bidirectional or unidirectional signal transfer across isolation barrier for control, status, and synchronization signals. |
| Soft-start function | Prevents inrush current during power-up, protecting transformer and downstream capacitors in isolated power architectures. |
| High CMTI (>25 kV/µs) | Maintains signal integrity in high dv/dt environments such as IGBT gate drive circuits and motor inverters. |
| Thermal shutdown + overcurrent protection | Self-protecting operation avoids catastrophic failure under sustained overload or elevated ambient temperature conditions. |
Applications
| Power Supply Start-Up Bias | Isolated Sensor Interface |
|---|---|
|
Use Scenario: Providing initial bias power to auxiliary controllers and gate drivers before main converter starts. IC Role / Device Role / Timing Role: Isolated DC-DC regulator supplying 5 V or 15 V startup rail while simultaneously isolating control signals. Use Value: Enables zero-component start-up sequencing and eliminates reliance on lossy auxiliary windings or separate bias supplies. |
Use Scenario: Interfacing analog sensors in high-voltage zones (e.g., motor phase current, bus voltage) to low-voltage MCU domains. IC Role / Device Role / Timing Role: Signal isolator + local power source for sensor signal conditioning circuitry on the high-side domain. Use Value: Removes ground loop errors and enables safe, accurate measurement without external isolated power rails. |
| Process Control I/O Module | RS-485 Transceiver Isolation |
|
Use Scenario: Digital I/O expansion in PLC backplanes where field-side signals must be galvanically isolated from CPU side. IC Role / Device Role / Timing Role: Quad-channel isolator providing four independent digital paths plus regulated 3.3 V or 5 V for field-side logic. Use Value: Reduces component count per I/O channel and simplifies PCB layout by integrating power and signal isolation. |
Use Scenario: Isolating RS-485 transceivers in industrial networks exposed to lightning surges and ground potential differences. IC Role / Device Role / Timing Role: Supplies isolated 5 V power to transceiver IC and isolates TX/RX/DE/RE control lines across barrier. Use Value: Meets IEC 61000-4-5 surge immunity requirements while eliminating need for discrete isolated DC-DC converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated DC-DC + signal isolation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4472ARIZ | Same package and pinout; lower VISO supply current (386 mA vs. 382 mA @ 5 VIN/5 VISO, 25 Mbps not supported). | Targeted for lower-power isolated interfaces where 1 Mbps data rate suffices and <200 mA VISO load is required. | Select ADUM4472ARIZ when reduced quiescent current and cost optimization outweigh need for maximum VISO current headroom. |
| ADUM4473ARIZ | Identical architecture; offers 384 mA available VISO current and same 1 Mbps data rate, but differs in internal channel direction configuration (3 forward + 1 reverse vs. ADUM4474's 2+2). | Suitable for asymmetric data flow topologies like master-slave sensor buses requiring three upstream and one downstream channel. | Choose ADUM4473ARIZ only if channel direction assignment matches system-level signal routing needs. |
Compared with ADUM4472ARIZ and ADUM4473ARIZ, the ADUM4474ARIZ provides the highest available VISO supply current (382 mA) among the ARIZ-grade variants and supports a balanced 2-forward/2-reverse channel configuration-making it optimal for bidirectional control loops requiring equal channel flexibility and margin on isolated power delivery.
Availability
ADUM4474ARIZ is available at Aetrix Electronics and suitable for industrial automation, motor control, and process instrumentation requiring stable component supply, long-term lifecycle support, and certified reinforced isolation.
Supply support for ADUM4474ARIZ 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 technologies, serving industrial, automotive, communications, and healthcare markets with precision components and system-level solutions.
The ADuM447x product line was designed to replace optocoupler-based isolated power and signal architectures with fully integrated, transformer-coupled solutions offering higher reliability, tighter regulation, and simplified certification for industrial safety standards.
FAQ
What is the maximum isolated output voltage supported by ADUM4474ARIZ?
ADUM4474ARIZ 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 multiple input/output configurations in Tables 1–4 of the Rev. 0 datasheet, including 5 VIN/15 VISO and 5 VIN/24 VISO test conditions.
Does ADUM4474ARIZ support 25 Mbps data rate?
No, ADUM4474ARIZ does not support 25 Mbps. It is rated for up to 1 Mbps data rate, as specified in the AC specifications section for ADuM447xARIZ grade devices. The 25 Mbps capability is exclusive to CRIZ-grade variants (e.g., ADUM4474CRIZ), which are distinct orderable parts with different speed binning and test criteria.
What is the purpose of the OC pin on ADUM4474ARIZ?
The OC (Overcurrent) pin on ADUM4474ARIZ is an open-drain fault indicator that asserts low during pulse-by-pulse overcurrent events detected in the isolated DC-DC converter. It allows system-level monitoring and can be used to trigger shutdown or latching logic, as described in the Applications Information section of the datasheet.
Can ADUM4474ARIZ operate with a 3.3 V primary input supply?
Yes, ADUM4474ARIZ supports 3.3 V primary input operation, delivering regulated isolated outputs such as 3.3 V or 5 V. Electrical characteristics for 3.3 VIN/3.3 VISO and 3.3 VIN/5 VISO configurations are explicitly detailed in Tables 2 and 3 of the datasheet, confirming functionality and performance limits.
How much VISO supply current is available when using ADUM4474ARIZ at 5 V input and 5 V isolated output?
At 5 VIN/5 VISO operation with all channels active at ≤1 Mbps, ADUM4474ARIZ provides up to 382 mA of available VISO supply current, as specified in Table 1 under "Available VISO Supply Current" for the ADuM4474 variant. This value assumes fSW = 500 kHz and CL = 15 pF at 12.5 MHz.
ADUM4474ARIZ 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:
- 0/4
- 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
ADUM4474ARIZ FAQ
1.How can I place an order for ADUM4474ARIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM4474ARIZ 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 ADUM4474ARIZ reliable?
The price and inventory of ADUM4474ARIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM4474ARIZ is usually 5 days.
3.What payment methods are accepted for ADUM4474ARIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM4474ARIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM4474ARIZ?
ADUM4474ARIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM4474ARIZ 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 ADUM4474ARIZ?
For technical support, including ADUM4474ARIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM4474ARIZ requirements.
6.How does Aetrix verify that ADUM4474ARIZ is sourced from the original manufacturer or authorized distributors?
All ADUM4474ARIZ 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 ADUM4474ARIZ meets industry standards.
7.What is the process for return or replacement of ADUM4474ARIZ?
All ADUM4474ARIZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM4474ARIZ, 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 ADUM4474ARIZ part is unused and in its original packaging.
Return procedure for ADUM4474ARIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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