MAX9938FELT+T

The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of V₀ₛ less than 500 μV (max) and gain error less than 0.5% (max). Quiescent supply current is an ultra-low 1 μA. 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 ampli­ fiers 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 500 μV (max) input offset voltage allows small 25 mV to 50 mV full-scale VSENSE voltage for very low voltage drop at full-current measurement. The MAX9938 is offered in tiny 4-bump, UCSP (1 mm x 1mm x 0.6 mm footprint), 5-pin SOT23, and 6-pin μDFN (2 mm x 2 mm x 0.8 mm) packages specified for operation over the -40 ℃ to +85 ℃ extended temperature range.

Applications

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

Key features

• Ultra-Low Supply Current of 1 μA (max)
• Low 500 μV (max) Input Offset Voltage
• Low <0.5% (max) Gain Error
• Input Common Mode: +1.6 V to +28 V
• Voltage Output Four Gain Versions Available • +25 V/V (MAX9938T) 50 V/V (MAX9938F) 100 V/V (MAX9938H) 200 V/V (MAX9938W)
• Tiny 1 mm x 1 mm x 0.6 mm, 4-Bump UCSP, 5-P SOT23, or 2 mm x 2 mm x 0.8 mm, 6-Pin μDFN Packages