MAX9938

PRODUCTION

nanoPower, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier

Industry's Smallest Current-Sense Amplifier: 1mm x 1mm with ICC < 1µA, VOS < 500µV, Gain Error < 0.5%

Data Sheet (Rev. 7) Product Selection Table
Part Models
18
1ku List Price
Starting From $0.77
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Part Details

  • Ultra-Low Supply Current of 1µA (max)
  • Low 500µV (max) Input Offset Voltage
  • Low < 0.5% (max) Gain Error
  • Input Common Mode: +1.6V to +28V
  • Voltage Output
  • Four Gain Versions Available
    • +25V/V (MAX9938T)
    • 50V/V (MAX9938F)
    • 100V/V (MAX9938H)
    • 200V/V (MAX9938W)
  • Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP, 5-Pin SOT23, or 2mm x 2mm x 0.8mm, 6-Pin µDFN Packages
MAX9938
nanoPower, 4-Bump UCSP/SOT23, Precision Current-Sense Amplifier
MAX9938: Typical Operating Circuit
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Documentation

Data Sheet 1

Design Note 3

Technical Articles 3

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Hardware Ecosystem

Parts Product Life Cycle Description
Current Sense Amplifiers 3
MAX4372
RECOMMENDED FOR NEW DESIGNS Low-Cost, UCSP/SOT23, Micropower, High-Side Current-Sense Amplifier with Voltage Output
MAX4073
PRODUCTION Low-Cost, SC70, Voltage-Output, High-Side Current-Sense Amplifier
MAX4173
PRODUCTION Low-Cost, SOT23, Voltage-Output, High-Side Current-Sense Amplifier
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Tools & Simulations

SPICE Model 1

Evaluation Kits

MAX9938EVKIT

Evaluation Kit for the MAX9938

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Features and Benefits

  • Precision Real-Time Current Monitoring
  • 1.6V to 28V Input Common-Mode Range
  • Lead-Free and RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested

Product Details

The MAX9938 evaluation kit (EV kit) provides a proven design to evaluate the MAX9938 high-side current-sense amplifier, which offers precision accuracy specifications of VOS less than 500µV (max) and gain error less than 0.5% (max). This EV kit demonstrates the MAX9938 in a tiny 1mm x 1mm x 0.6mm, 4-bump UCSP™ package. The MAX9938 is also available in a 5-pin SOT23, but that package is not compatible with this EV kit.

The MAX9938 EV kit PCB comes with a MAX9938FEBS+ installed, which is the 50V/V gain version. Contact the factory for free samples of the pin-compatible MAX9938TEBS+ and MAX9938HEBS+, which are 25V/V and 100V/V gain versions, respectively.

Applications

  • Cell Phones
  • Notebook Computers
  • PDAs
  • Portable/Battery-Powered Systems
  • Power Management Systems
MAX9938EVKIT
Evaluation Kit for the MAX9938

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