Features and Benefits

  • Ultralow power operation
    3.3 V operation
    6 μA per channel quiescent current, refresh enabled
    0.3 μA per channel quiescent current, refresh disabled
  • 148 μA/Mbps per channel typical dynamic current
  • 2.5 V operation
    3 μA per channel quiescent current, refresh enabled
    0.1 μA per channel quiescent current, refresh disabled
  • Quad-channel products available
  • See datasheet for additional features

Product Details

The ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 are micropower, dual-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology. (Quad-channel products available). Combining high speed, complementary metal oxide semiconductor (CMOS) and monolithic air core transformer technologies, these isolation components provide outstanding performance characteristics superior to the alternatives, such as optocoupler devices.

The 20-lead SSOP version of the ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 allows control of the internal refresh functions. As shown in Figure 3, in standard operating mode, when ENx = 0 (internal refresh enabled), the current per channel is less than 10 μA.

When ENx = 1 (internal refresh disabled), the current per channel drops to less than 1 μA.

The ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 are packaged in either a 20-lead SSOP for 3.75 kV reinforced isolation or an 8-lead SOIC for 3 kV basic isolation. The devices meet regulatory requirements, such as UL and CSA standards.

In addition to the space saving package options, the ADuM1240 / ADuM1241 / ADuM1245 / ADuM1246 operate with supplies as low as 2.25 V. All models provide low, pulse width distortion at <8 ns. In addition, every model has an input glitch filter to protect against extraneous noise disturbances.


  1. Outstanding Power Performance.
    These 3 kV digital isolators operate with 2.5 V supplies.
  2. Distortion and Noise Protection.
    Low pulse width distortion (< 8 ns for A grade models) and an input glitch filter for extraneous noise disturbance protection.


  • General-purpose, low power, multichannel isolation
  • 1 MHz low power SPI
  • 4 mA to 20 mA loop process control

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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IBIS Models

ADUM1246 IBIS Models

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.

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(*)The 1Ku 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. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.



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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.