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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

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