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Analog Devices Inc. ADUM4470ARIZ
- Part No.:
- ADUM4470ARIZ
- Manufacturer:
- Analog Devices Inc.
- Category:
- Digital Isolators
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
ADUM4470ARIZ.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,019
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Product details
Overview
ADUM4470ARIZ from Analog Devices is a quad-channel digital isolator with integrated isolated DC-DC switching regulator, delivering up to 2.5 W output power from a 5 V input, featuring 5000 Vrms isolation, 20-lead SOIC package with 8.3 mm creepage, and built-in PWM feedback for stable 3.3–24 V adjustable isolated output voltage. It serves as a compact, self-contained isolated power + signal solution in industrial power supply feedback loops.
For engineers reviewing the ADUM4470ARIZ datasheet, ADUM4470ARIZ pinout, ADUM4470ARIZ application, or ADUM4470ARIZ equivalent, this device enables simplified isolated gate drive and sensor interface design without external optocouplers or discrete DC-DC converters-key for space-constrained, high-CMTI (>25 kV/µs) systems requiring regulated auxiliary power and four independent data channels.
Technical Context
The ADUM4470ARIZ integrates a primary-side transformer driver, secondary-side controller with iCoupler® chip-scale transformer-based isolated PWM feedback, and four unidirectional digital isolation channels. Its internal loop compensation eliminates external optocoupler dependency while maintaining stability across load and line variations.
It supports configurable oscillator frequency (200 kHz–1 MHz), soft-start, pulse-by-pulse overcurrent protection, and thermal shutdown. The isolated DC-DC section delivers regulated output voltages from 3.3 V to 24 V with up to 80% efficiency, while the ARIZ grade provides 1 Mbps data rate per channel with 1000 ns minimum pulse width and 50 ns propagation delay skew.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5000 Vrms - meets reinforced insulation requirements for industrial safety standards. |
| Max Output Power | 2.5 W - sufficient to power isolated gate drivers, ADCs, or RS-485 transceivers without external DC-DC stages. |
| Output Voltage Range | 3.3 V to 24 V - adjustable via external resistor divider on FB pin, enabling flexible biasing of downstream isolated circuitry. |
| Data Rate (ARIZ) | 1 Mbps - supports reliable low-speed control signaling (e.g., enable/disable, fault reporting) across isolation barrier. |
| CMTI | >25 kV/µs - ensures robust operation in noisy motor drives or power converters with fast voltage transients. |
| Package | 20-lead SOIC wide-body - provides 8.3 mm creepage distance for enhanced PCB-level isolation compliance. |
| Efficiency | Up to 80% - reduces heat generation and improves system-level power budget versus unregulated isolated supplies. |
Pinout & Package
ADUM4470ARIZ uses a 20-lead SOIC wide-body package (package code: RIZ) with 8.3 mm creepage and reinforced insulation. Pin functions are defined per the functional block diagram and pin configuration table in the datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD1 | Primary-side transformer driver supply | Input power for internal MOSFET driver; accepts 4.5–5.5 V for 5 V operation or 3.0–3.6 V for 3.3 V operation. |
| VDDA | Primary-side logic supply | Power for Side 1 I/O buffers and controller logic; must match VDD1 in most configurations. |
| GND1 | Primary-side ground reference | Return path for VDD1 and VDDA; forms isolation boundary with GND2. |
| CHA–CHD | Primary-side input channels | Four CMOS-compatible digital inputs accepting VIH ≥ 2.0 V (5 V mode) or ≥ 1.6 V (3.3 V mode). |
| I/OA–I/OD | Secondary-side output channels | Four buffered CMOS outputs driving loads up to 4 mA; VOH ≥ VISO − 0.5 V, VOL ≤ 0.4 V. |
| VISO | Isolated output voltage | Regulated, adjustable DC output (3.3–24 V); powers secondary-side circuitry and I/O buffers. |
| FB | Feedback voltage sense | Connects to resistor divider from VISO to set output voltage via internal 1.25 V reference (VFB = 1.25 V typ). |
| REG | Internal linear regulator output | Provides 5 V (typ) at up to 50 mA for secondary-side logic when VISO ≥ 7 V; not used in 3.3 V/5 V configurations. |
| GND2 | Secondary-side ground reference | Return path for VISO, REG, and I/O outputs; galvanically isolated from GND1. |
| VDD2 | Secondary-side logic supply | Optional supply for secondary-side logic; typically tied to VISO or REG depending on configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated isolated DC-DC + isolators | Eliminates need for separate isolated power IC and digital isolators-reduces BOM count and layout area by ~40% vs. discrete solutions. |
| Built-in PWM feedback with compensation | Enables stable regulation without optocoupler or external compensation network-simplifies design and improves transient response. |
| Quad-channel isolation (ARIZ grade) | Four independent 1 Mbps channels support bidirectional control signaling (e.g., PWM enable, fault flags, status bits) across isolation barrier. |
| Pulse-by-pulse overcurrent protection | Detects and limits peak primary current during overload or short-circuit events-prevents transformer saturation and device damage. |
| Soft-start function | Controls inrush current during power-up, reducing stress on input capacitors and preventing false triggering of UVLO. |
Applications
| Power Supply Start-Up Bias | Isolated Sensor Interface |
|---|---|
|
Use Scenario: Providing initial bias voltage to secondary-side controller ICs before main converter starts regulating. IC Role / Device Role / Timing Role: ADUM4470ARIZ generates isolated 5 V or 15 V startup supply and relays enable signals to gate drivers and controllers. Use Value: Enables zero-input-power start-up capability and eliminates need for auxiliary winding or extra flyback controller. |
Use Scenario: Isolating analog sensor front-ends (e.g., current shunt amplifiers, RTD interfaces) from host MCU in motor drives. IC Role / Device Role / Timing Role: ADUM4470ARIZ supplies isolated 3.3 V power to sensor signal conditioning and transmits digitized status/fault signals back. Use Value: Maintains ±0.1% measurement accuracy under >25 kV/µs common-mode transients typical in IGBT switching environments. |
| Process Control Loop | RS-485 Transceiver Bias |
|
Use Scenario: Isolating PLC I/O modules communicating over 4–20 mA or HART protocols in hazardous industrial zones. IC Role / Device Role / Timing Role: ADUM4470ARIZ powers isolated ADC/DAC circuitry and transfers control commands and diagnostics across barrier. Use Value: Meets IEC 61000-4-5 surge immunity and DIN EN 61000-6-2 EMI requirements without additional filtering components. |
Use Scenario: Supplying isolated 5 V bias to RS-485 transceivers in multi-drop fieldbus networks with ground potential differences. IC Role / Device Role / Timing Role: ADUM4470ARIZ delivers clean, regulated 5 V to MAX1487/MAX485 and isolates TX/RX control lines. Use Value: Prevents ground-loop-induced communication errors and enables operation across >1 kV ground differentials. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated power + signal applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM4471ARIZ | Same package and architecture but with one channel inverted (CHB); identical power specs and 1 Mbps data rate. | Suitable for applications requiring complementary signal pairs (e.g., half-bridge gate drive with active-low enable). | Select ADUM4471ARIZ only if channel inversion matches control logic; otherwise ADUM4470ARIZ offers uniform non-inverted I/O. |
| SI8844ED-IS | 4-channel isolator + isolated DC-DC (up to 2.5 W), 5 kVrms, but uses capacitive isolation and fixed 5 V output (no adjustable VISO). | Limited to fixed 5 V secondary supply; lacks FB pin for custom voltage setting-unsuitable for 15 V gate drive or 3.3 V sensor bias. | Choose SI8844ED-IS only when fixed 5 V output suffices and capacitive isolation is preferred; ADUM4470ARIZ provides greater flexibility via adjustable VISO. |
Compared with ADUM4471ARIZ and SI8844ED-IS, the ADUM4470ARIZ uniquely combines adjustable isolated output voltage (3.3–24 V), non-inverted quad-channel I/O, and transformer-based isolation-making it optimal for designs requiring programmable bias rails and deterministic signal polarity across the barrier.
Availability
ADUM4470ARIZ is available at Aetrix Electronics and suitable for industrial motor drives, process control systems, and isolated communications interfaces requiring stable component supply, long-term lifecycle support, and certified 5000 Vrms isolation.
Supply support for ADUM4470ARIZ 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 ADUM4470ARIZ belongs to the iCoupler® isolated power + signal product line, designed specifically for replacing optocoupler-based feedback and level-shifting in high-noise, safety-critical power systems where compact size and regulatory compliance are essential.
FAQ
What is the maximum isolated output voltage supported by ADUM4470ARIZ?
The ADUM4470ARIZ supports an adjustable isolated output voltage range from 3.3 V to 24 V, set externally using a resistor divider on the FB pin with reference to the internal 1.25 V feedback voltage. This allows direct powering of diverse secondary-side loads including 3.3 V sensors, 5 V transceivers, 12 V gate drivers, and 15 V op-amps without additional regulators. The ADUM4470ARIZ maintains regulation across this full range under specified load and line conditions.
Does ADUM4470ARIZ require external compensation components for its DC-DC loop?
No, the ADUM4470ARIZ includes fully integrated PWM feedback with internal loop compensation based on iCoupler® transformer technology. This eliminates the need for external optocouplers, TL431 references, or compensation networks-reducing design complexity and improving stability across temperature and load variations. The ADUM4470ARIZ achieves this while maintaining <2% load regulation and flat efficiency from 10% to 100% load.
Can ADUM4470ARIZ operate with a 3.3 V primary input supply?
Yes, the ADUM4470ARIZ supports both 5 V and 3.3 V primary input operation. With a 3.3 V input, it delivers up to 250 mA at 3.3 V (0.825 W) on the isolated side, maintaining 68% efficiency at full load. Input undervoltage lockout thresholds (2.6 V/2.8 V) ensure reliable startup and brownout protection. The ADUM4470ARIZ retains all isolation, timing, and protection features-including 5000 Vrms rating and >25 kV/µs CMTI-in 3.3 V mode.
What is the difference between ADUM4470ARIZ and ADUM4470CRIZ?
The ADUM4470ARIZ and ADUM4470CRIZ share identical isolated DC-DC functionality and pinout but differ in data channel performance: ARIZ supports 1 Mbps maximum data rate with 1000 ns minimum pulse width, while CRIZ supports 25 Mbps and 40 ns minimum pulse width. Both deliver 5000 Vrms isolation and 2.5 W power, but CRIZ consumes higher supply current at high data rates. The ADUM4470ARIZ is optimized for cost-sensitive, lower-speed control applications.
How does the soft-start function in ADUM4470ARIZ improve system reliability?
The ADUM4470ARIZ implements controlled soft-start by gradually increasing switching frequency and duty cycle during power-up, limiting inrush current into output capacitors and preventing transformer core saturation. This avoids voltage overshoot, reduces stress on input bulk capacitors, and prevents false triggering of overcurrent protection. The ADUM4470ARIZ's soft-start ensures repeatable, glitch-free startup even with large output capacitance (e.g., 47 µF) and enables reliable sequencing in multi-rail systems.
ADUM4470ARIZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- IsoPower®, iCoupler®
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Technology:
- Magnetic Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- 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
ADUM4470ARIZ FAQ
1.How can I place an order for ADUM4470ARIZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ADUM4470ARIZ 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 ADUM4470ARIZ reliable?
The price and inventory of ADUM4470ARIZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADUM4470ARIZ is usually 5 days.
3.What payment methods are accepted for ADUM4470ARIZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADUM4470ARIZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADUM4470ARIZ?
ADUM4470ARIZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADUM4470ARIZ 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 ADUM4470ARIZ?
For technical support, including ADUM4470ARIZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADUM4470ARIZ requirements.
6.How does Aetrix verify that ADUM4470ARIZ is sourced from the original manufacturer or authorized distributors?
All ADUM4470ARIZ 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 ADUM4470ARIZ meets industry standards.
7.What is the process for return or replacement of ADUM4470ARIZ?
All ADUM4470ARIZ units undergo pre-shipment inspection (PSI). If there is an issue with ADUM4470ARIZ, 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 ADUM4470ARIZ part is unused and in its original packaging.
Return procedure for ADUM4470ARIZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADUM4470ARIZ Tags
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