Features and Benefits

  • 20 MHz maximum external clock rate
  • Second-order modulator
  • 16 bits, no missing codes
  • ±2 LSB INL typical at 16 bits
  • 1 µV/°C typical offset drift
  • On-board digital isolator
  • On-board reference
  • ±250 mV analog input range
  • Low power operation: 17 mA typical at 5.5 V
  • −40°C to +125°C operating range
  • 16-lead SOIC package
  • Internal clock version: AD7400A
  • Safety and regulatory approvals
    • UL recognition
      • 5000 V rms for 1 minute per UL 1577
    • CSA Component Acceptance Notice #5A
    • VDE Certificate of Conformity
      • DIN V VDE V 0884-10 (VDE V 0884-10):2006-12
      • VIORM = 891 V peak
  • Qualified for Automotive Applications

Product Details

The AD7401A is a second-order, sigma-delta (Σ-Δ) modulator that converts an analog input signal into a high speed, 1-bit data stream with on-chip digital isolation based on the Analog Devices, Inc., iCoupler® technology. The AD7401A operates from a 5 V power supply and accepts a pseudo-differential input signal of ±250 mV (±320 mV full scale). The analog input is continuously sampled by the analog modulator, eliminating the need for external sample-and-hold circuitry. The input information is contained in the output stream as a density of ones with a data rate of up to 20 MHz. The original information can be reconstructed with an appropriate digital filter. The serial I/O can use a 5 V or a 3.3 V supply (VDD2).

The serial interface is digitally isolated. High speed CMOS, combined with Analog Devices, Inc., iCoupler® technology, means the on-chip isolation provides outstanding performance characteristics, superior to alternatives such as optocoupler devices. The device contains an on-chip reference. The AD7401A is offered in a 16-lead SOIC and has an operating temperature range of −40°C to +125°C.


  • AC motor controls
  • Shunt current monitoring
  • Data acquisition systems
  • Analog-to-digital and opto-isolator replacements

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.

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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.

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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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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.