MAX9938 Datasheet | Maxim Integrated

Description The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of V OS 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 puters, cell phones, PDAs, .. and all battery-operated portable devices where accuracy, low quiescent current, and small size are critical. The MAX9938 features an input mon-mode voltage range from 1.6V to 28V. These current-sense amplifiers have a voltage output and are offered in three gain versions: 25V/V (MAX9938T), 50V/V (MAX9938F), and 100V/V (MAX9938H). The three gain selections offer flexibility in the choice of the external current-sense resistor. The very low 500μV (max) input offset voltage allows small 25m V to 50m V full-scale VSENSE voltage for very low voltage drop at full-current measurement. The MAX9938 is offered in tiny 4-bump, UCSP (1mm x 1mm x 0.6mm footprint) and 5-pin SOT23 packages, specified for operation over the -40°C to +85°C extended temperature range. Features o Ultra-Low Supply Current of 1µA (max) o Low 500µV (max) Input Offset Voltage o Low < 0.5% (max) Gain Error o Input mon Mode: +1.6V to +28V o Voltage Output o Three Gain Versions Available 25V/V (MAX9938T) 50V/V (MAX9938F) 100V/V (MAX9938H) o Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP or 5-Pin SOT23 Package Ordering Information PART MAX9938TEBS+ MAX9938FEBS+ MAX9938HEBS+ MAX9938TEUK+ MAX9938FEUK+ PINPACKAGE 4 UCSP 4 UCSP 4 UCSP 5 SOT23 5 SOT23 GAIN (V/V) 25 50 100 25 50 100 TOP MARK +AGD +AGE +AGF +AFFB +AFFC +AFFD Applications Cell Phones PDAs Power Management Systems Portable/Battery-Powered Systems Notebook puters MAX9938HEUK+ 5 SOT23 +Denotes a lead-free package. Note: All devices are specified over the -40°C to +85°C extended temperature range. UCSP is a trademark of Maxim Integrated Products, Inc. Pin Configurations TOP VIEW...