Features and Benefits

  • Overvoltage fault protection up to ±60 V on S1 and S2 pins
  • Power-off protection up to ±60 V on S1 and S2 pins
  • Known state without digital inputs present
  • Low on resistance of 11 Ω typical
  • Ultraflat, on resistance
  • Latch-up immune under any circumstance
  • 3.5 kV human body model (HBM) ESD rating
  • VSS to VDD −2 V signal range
    • Fully specified at ±15 V, ±20 V, +12 V, and +36 V
    • ±5 V to ±22 V dual-supply operation
    • 8 V to 44 V single-supply operation
  • 10-lead, 3 mm × 2 mm, LFCSP

Product Details

The ADG5421F is a dual SPST, low on resistance switch that features overvoltage protection, power-off protection, and overvoltage detection on the source pins.

When no power supplies are present, the switch remains in the off condition, and the switch inputs are high impedance. When powered, if the analog input signal levels on either of the Sx pins exceed VDD or VSS by the threshold voltage, VT, both switches turn off together, and the open-drain fault flag (FF) pin pulls to a logic low. Input signal levels up to +60 V or −60 V relative to ground are blocked in both the powered and unpowered condition.

The switches turn on with a Logic 1 input and conduct equally well in both directions. The digital input is compatible with 1.8 V logic inputs over the full operating supply range.


  • Analog input and output modules
  • Process control and distributed control systems
  • Data acquisition
  • Instrumentation
  • Avionics
  • Automatic test equipment
  • Communication systems
  • Relay replacement

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.

Evaluation Kits (1)

Tools & Simulations


LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.


Models for the following parts are available in LTspice:


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Reference Designs (1)

Product Recommendations

ADG5421F Companion Parts

Recommended Analog to Digital Converter

  • 16-Bit, 2 MSPS Precision Pseudo Differential SAR ADC: AD4000.
  • Precision 24-Bit ADC with Power Scaling: AD7768-1.

Recommended Power Products

  • DC-to-DC Switching Regulator with Independent Positive and Negative Outputs: ADP5070.
  • For a low dropout linear regulator: ADP7182, ADP7118.

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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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.