1 kV RMS Quad-Channel Digital Isolator

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Product Details

The ADuM7440/ADuM7441/ADuM7442 are 4-channel digital isolators based on the Analog Devices, Inc.,  iCoupler® technology. Combining high speed CMOS and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices and other integrated couplers.

The ADuM7440/ADuM7441/ADuM7442 family of quad 1 kV digital isolation devices is packaged in a small 16-lead QSOP. While most 4-channel isolators come in 16-lead wide SOIC packages, the ADuM7440/ADuM7441/ADuM7442 free almost 70% of board space and yet can still withstand high isolation voltage and meet UL regulatory requirements. In addition to the space savings, the ADuM7440/ADuM7441/ADuM7442 offer a lower price than 2.5 kV or 5 kV isolators where only functional isolation is needed.

This family, like many Analog Devices isolators, offers very low power consumption, consuming one-tenth to one-sixth the power of comparable isolators at comparable data rates up to 25 Mbps. Despite the low power consumption, all models of the ADuM7440/ADuM7441/ADuM7442 provide low pulse width distortion (<5 ns for C grade). In addition, every model has an input glitch filter to protect against extraneous noise disturbances.

The ADuM7440/ADuM7441/ADuM7442 isolators provide four independent isolation channels in a variety of channel configurations and two data rates (see the Ordering Guide) up to 25 Mbps. All models operate with the supply voltage on either side ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems as well as enabling voltage translation functionality across the isolation barrier. All products also have an output default high logic state in the absence of the input power.


  • General-purpose, multichannel isolation
  • SPI interface/data converter isolation
  • RS-232/RS-422/RS-485 transceivers Industrial field bus isolation

Product Lifecycle

checked 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


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EVAL-ADUMQS Circuit Diagram

Product Details

EVAL-ADuMQSEBZ can be used with most iCoupler® and isoPower(R) isolation products in the 16-lead, wide-body SOIC and QSOP packages. The evaluation board supports the common pad positions for power, ground, and I/O pins.

Supported iCoupler® Products

  • ADuM130x
  • ADuM131x
  • ADuM140x
  • ADuM141x
  • ADuM1510
  • ADuM240x
  • ADuM330x
  • ADuM340x
  • ADuM344x
  • ADuM440x
  • ADuM5000
  • ADuM520x
  • ADuM540x
  • ADuM6000
  • ADuM620x
  • ADuM640x
  • ADuM744x
  • ADuM7510

Tools & Simulations

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IBIS Models

Design Resources

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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.

ADUM7440 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints



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The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.