MAXIM MAX9938HEUK+T

The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of V₀ₛ 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. The MAX9938 features an input common-mode voltage range from 1.6V to 28V. These current-sense amplifiers have a voltage output and are offered in four gain versions: 25V/V (MAX9938T), 50V/V (MAX9938F), 100V/V (MAX9938H), and 200V/V (MAX9938W). The four gain selections offer flexibility in the choice of the external current-sense resistor. The very low 500μV (max) input offset voltage allows small 25mV to 50mV 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), 5-pin SOT23, and 6-pin μDFN (2mm x 2mm x 0.8mm) packages specified for operation over the -40°C to +85°C extended temperature range.

• 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, 50V/V, 100V/V, 200V/V
• Tiny 1mm x 1mm x 0.6mm, 4-Bump UCSP, 5-P SOT23, or 2mm x 2mm x 0.8mm, 6-Pin μDFN Packages

• Cell Phones
• PDAs
• Power Management Systems
• Portable/Battery-Powered Systems
• Notebook Computers