1. Products
  2. Interface and Isolation
  3. Digital Isolation Technology
  4. isoPower
  5. ADUM4474


Features and Benefits

  • Isolated PWM feedback with built-in compensation
  • Primary side transformer driver for up to 2.5 W output power with 5 V input voltage
  • Regulated adjustable output: 3.3 V to 24 V
  • Up to 80% efficiency
  • Quad DC-to-25 Mbps (NRZ) signal isolation channels
  • 200 kHz to 1 MHz adjustable oscillator
  • Soft start function at power-up
  • Pulse-by-pulse overcurrent protection
  • Thermal shutdown
  • 5000 V rms isolation
  • High common-mode transient immunity: >25 kV/μs
  • 20-lead SOIC package with 8.3 mm creepage
  • High temperature operation: 105°C
  • Safety and regulatory approvals
    • UL recognition: 5000 V rms for 1 minute per UL 1577
    • CSA certification per IEC 62368-1, IEC 61010-1, and IEC 60601-1
    • VDE certificate of conformity
      • VDE V 0884-10
      • VIORM = 849 V peak

Product Details

The ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474 are quad-channel, digital isolations with a regulated DC/DC isolated power supply controller with an internal MOSFET driver. The DC/DC controller has an internal isolated PWM feedback from the secondary side based on the iCoupler® chip scale transformer technology and complete loop compensation. This eliminates the need to use an optocoupler for feedback and compensates the loop for stability.

The ADuM447x isolator provides a more stable output voltage and higher efficiency compared to unregulated isolated DC/DC jpower supplies. The fully integrated feedback and loop compensation in a wide-body SOIC package provide a smaller form factor and 8.3 mm creepage distance solution. The regulated feedback provides a relatively flat efficiency curve over the full output power range. The ADuM3070 enables a DC/DC converter with a 3.3 V to 24 V isolated output voltage range from either a 5.0 V or a 3.3 V input voltage, with an output power of up to 2.5 W.

The ADuM447x isolators provide four independent isolation channels in a variety of channel configurations and data rates. (The x in ADuM447x throughout this data sheet stands for the ADuM4470 / ADuM4471 / ADuM4472 / ADuM4473 / ADuM4474).


  • Power supply startup bias and gate drives
  • Isolated sensor interfaces
  • Process controls
  • RS-232/RS-422/RS-485 transceivers

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
ADUM4474ARIZ Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
ADUM4474ARIZ-RL Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
ADUM4474CRIZ Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
ADUM4474CRIZ-RL Material Declaration Reliability Data 20-Lead SOIC (Increased Creepage)
Wafer Fabrication Data

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.