Overview

Features and Benefits

  • Low-Cost, Compact, Current-Sense Solution
  • Three Gain Versions Available
    • +20V/V (MAX4073T)
    • +50V/V (MAX4073F)
    • +100V/V (MAX4073H)
  • ±1.0% Full-Scale Accuracy
  • 500µA Supply Current
  • Wide 1.8MHz Bandwidth
  • +3V to +28V Operating Supply
  • Wide +2V to +28V Common-Mode Range Independent of Supply Voltage
  • Automotive Temperature Range (-40°C to +125°C)
  • Available in Space-Saving 5-Pin SC70 Package

Product Details

The MAX4073 low-cost, high-side current-sense amplifier features a voltage output that eliminates the need for gain-setting resistors making it ideal for cell phones, notebook computers, PDAs, and other systems where current monitoring is crucial. High-side current monitoring does not interfere with the ground path of the battery charger making the MAX4073 particularly useful in battery-powered systems. The input common-mode range of +2V to +28V is independent of the supply voltage. The MAX4073's wide 1.8MHz bandwidth makes it suitable for use inside battery-charger control loops.

The combination of three gain versions and a selectable external-sense resistor sets the full-scale current reading. The MAX4073 offers a high level of integration, resulting in a simple and compact current-sense solution.

The MAX4073 operates from a +3V to +28V single supply and draws only 0.5mA of supply current. This device is specified over the automotive operating temperature range (-40°C to +125°C) and is available in a space-saving 5-pin SC70 package (half the size of the SOT23).

For a similar device in a 6-pin SOT23 with a wider common-mode voltage range (0 to +28V), see the MAX4173 data sheet.

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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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.