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MAX9928*, MAX9929*
-0.1V to +24V Input Range, Micropower, Uni-/Bidirectional, Current-Sense Amplifiers

Ultra-Small, 6-Bump UCSP Current-Sense Amplifiers with True -0.1V to +24V Input Range

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    Data Sheet
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    Description
    The MAX9928/MAX9929 low-cost, uni-/bidirectional, high-side, current-sense amplifiers are ideal for monitoring battery charge and discharge currents in notebooks, cell phones, and other portable equipment. These devices feature a wide -0.1V to +24V input common- mode voltage range, low 20µA supply current with VOS less than 0.4mV, and a gain accuracy of less than 1.25%. The input common-mode range is independent of the supply voltage, ensuring that the current-sense information remains accurate even when the measurement rail is shorted to ground.

    A digital SIGN output indicates direction of current flow, so the user can utilize the full ADC input range for measuring both charging and discharging currents.

    The MAX9928/MAX9929 are fully specified over the -40°C to +125°C automotive temperature range, and available in 6-bump UCSP™ (1mm X 1.5mm) and 8-pin µMAX® packages. The UCSP package is bump-to-bump compatible with the MAX4372_EBT.

    Key Features   Applications/Uses
    • Wide -0.1V to +24V Common-Mode Range, Independent of Supply Voltage
    • 2.5V to 5.5V Operating Supply Voltage
    • 0.4mV (max) Input Offset Voltage over +2V to +24V Input Common-Mode Range
    • Gain Accuracy Better than 1.25%
    • SIGN Output Indicates Current Polarity
    • Two IOUT Transconductance Versions Available
      • 2µA/mV (MAX9928T)
      • 5µA/mV (MAX9928F)
    • Two VOUT Gain Versions Available
      • 20V/V (MAX9929T)
      • 50V/V (MAX9929F)
    • 20µA Quiescent Supply Current
    • Pin Compatible with the MAX4372 in UCSP
    • Available in Ultra-Small 3x2 UCSP (1mm x 1.5mm) and 8-Pin µMAX Packages

     
  • Portable/Battery-Powered Systems
  • Notebook Computers
  • Automotive Power Management Systems
  • General-System/Board-Level Current Monitoring
  • Smart-Battery Packs/Chargers
  • Precision Current Sources
  • Cell Phones

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    This page last modified: 2008-07-03




             


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