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The MAX9938 high-side current-sense amplifier offersprecision accuracy specificaTIons of VOS less than500μV (max) and gain error less than 0.5% (max).Quiescent supply current is an ultra-low 1μA. TheMAX9938 fits in a TIny, 1mm x 1mm UCSP™ packagesize or a 5-pin SOT23 package, making the part ideal forapplicaTIons in notebook computers, cell phones, PDAs,and all battery-operated portable devices where accuracy,low quiescent current, and small size are criTIcal.The MAX9938 features an input common-mode voltagerange from 1.6V to 28V. These current-sense amplifiershave a voltage output and are offered in three gain versions:25V/V (MAX9938T), 50V/V (MAX9938F), and100V/V (MAX9938H).The three gain selections offer flexibility in the choice ofthe external current-sense resistor. The very low 500μV(max) input offset voltage allows small 25mV to 50mVfull-scale VSENSE voltage for very low voltage drop atfull-current measurement.The MAX9938 is offered in tiny 4-bump, UCSP (1mm x1mm x 0.6mm footprint), 5-pin SOT23, and 6-pin μDFN(2mm x 2mm x 0.8mm) packages specified for operationover the -40°C to +85°C extended temperature range.ApplicationsCell PhonesPDAsPower Management SystemsPortable/Battery-Powered SystemsNotebook Computers
