General Description

The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 500μV (max) and gain error less than 0.5% (max). Quiescent supply current is an ultra-low 1μA. The MAX9938 fits in a tiny, 1mm x 1mm UCSP™ package size or a 5-pin SOT23 package, making the part ideal for applications in notebook computers, cell phones, PDAs, and all battery-operated portable devices where accuracy, low quiescent current, and small size are critical.

Features

♦ 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

Applications

  Cell Phones

  PDAs

  Power Management Systems

  Portable/Battery-Powered Systems

  Notebook Computers