ADG5421:  High Voltage Latch-Up Proof, Dual SPST Switches

Product Details

Product Status:Recommended for New Designs

The ADG5421 is a monolithic industrial CMOS analog switch containing two independent latch-up immune single-pole/single-throw (SPST) switches. Each switch conducts equally well in both directions when on, and has an input signal range that extends to the power supplies. In the off condition, signal levels up to the supplies are blocked. Both ADG5421 switches are turned on with a Logic 1 input.

The ultralow on resistance and on-resistance flatness of these switches make them ideal solutions for data acquisition and gain switching applications, where low distortion is critical. The latch-up immune construction, and high ESD rating, makes these switches more robust in harsh environments.


  1. Trench isolation guards against latch-up. A dielectric trench
    separates the P and N channel transistors thereby preventing
    latch-up even under severe overvoltage conditions.
  2. Low RON.
  3. Dual-supply operation. For applications where the analog signal is bipolar, the ADG5421 can be operated from dual supplies up to ±22 V.
  4. Single-supply operation. For applications where the analog
    signal is unipolar, the ADG5421 can be operated
    from a single-rail power supply up to 40 V.
  5. 3 V logic compatible digital inputs: VINH = 2.0 V, VINL = 0.8 V.
  6. No VL logic power supply required.
  7. Available in 10-lead MSOP package.


  • High voltage signal routing
  • Automatic test equipment
  • Analog front-end circuits
  • Precision data acquisition
  • Industrial Instrumentation
  • Amplifier gain select
  • Relay replacement


  • Latch-up immune under all circumstances
  • Human body model (HBM) ESD rating: 8 kV
  • Low on resistance (13.5 Ω)
  • ±9 V to ±22 V dual-supply operation
  • 9 V to 40 V single-supply operation
  • 48 V supply maximum ratings
  • Fully specified at ±15 V, ±20 V, +12 V, and +36 V
  • VSS to VDD analog signal range

Functional Block Diagram for ADG5421

Evaluation Kits & Symbols & Footprints

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

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Price, packaging, availability

ADG5421 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
ADG5421BCPZ-RL7 Status: Pre-Release LFCSP:LEADFRM CHIP SCALE 10 Ind Reel, 1500 - - Y  Material Info Notify Me Contact ADI
ADG5421BRMZ Status: Production 10 ld MSOP 10 Ind Tube, 50 $2.26 $1.85 Y  Material Info Notify Me Purchase Sample
ADG5421BRMZ-RL7 Status: Production 10 ld MSOP 10 Ind Reel, 1000 - $1.85 Y  Material Info Notify Me Purchase
Price Table Help

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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