Features and Benefits

  • High-Density Quad-Channel Pulser in One Package
  • 0 to +220V Unipolar or ±110V Bipolar Outputs
  • 8.5Ω (typ) Output Impedance and 2.0A (typ) Output Current
  • 21Ω (typ) Always-On Active Clamp with Integrated Blocking Diodes
  • Integrated Output Diodes (MAX4940A Only)
  • No Special Power-Supply Sequencing Required for Trilevel Applications
  • Matched Rise/Fall Times and Matched Propagation Delays
  • CMOS-Compatible Logic Inputs
  • 56-Pin, 8mm x 8mm, TQFN Package

Product Details

The MAX4940/MAX4940A integrated circuits generate high-voltage, high-frequency, unipolar or bipolar pulses from low-voltage logic inputs. These quad/dual pulsers feature independent logic inputs, independent high-voltage pulser outputs with active clamps and independent high-voltage supply inputs.

The MAX4940/MAX4940A feature quad, high-voltage pulsers with 8.5Ω output impedance for the high-voltage outputs and a 21Ω impedance for the active clamp. The high-voltage outputs can provide 2.0A (typ) output current. All devices use two logic inputs per channel to control the positive and negative pulses. The MAX4940/MAX4940A have a dedicated input to control the active clamp. All devices feature an independent enable input EN. All digital inputs are CMOS compatible (see the Ordering Information/Selector Guide in the full data sheet).

The MAX4940/MAX4940A are available in a 56-pin, 8mm x 8mm, TQFN exposed pad package and are specified over the 0°C to +70°C commercial temperature range.

Warning: Exercise caution. The MAX4940/MAX4940A are designed to operate with high voltages.


  • Cleaning Equipment
  • Flaw Detection
  • Piezoelectric Drivers
  • Test Instruments
  • Ultrasound Medical Imaging

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.

Evaluation Kits (2)

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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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Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.