MAX9938

RS+, RS- to GND...................................................-0.3V to +30V
OUT to GND ...........................................................-0.3V to +6V
RS+ to RS- .......................................................................±30V
Short-Circuit Duration: OUT to GND ........................Continuous
Continuous Input Current (Any Pin)...............................±20mA
Continuous Power Dissipation (T_A = +70°C)
4-Bump UCSP (derate 3.0mW/°C above +70°C).........238mW
5-Pin SOT23 (derate 3.9mW/°C above +70°C)............312mW
Operating Temperature Range .......................-40°C to +85°C
Junction Temperature................................................ ...+150°C
Storage Temperature Range .........................-65°C to +150°C
Bump Temperature (soldering) Reflow...........................+235°C
Lead Temperature (soldering, 10s) ...............................+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

The MAX9938 high-side current-sense amplifier offers precision accuracy specifications of VOS less than 500V (max) and gain error less than 0.5% (max).

Quiescent supply current is an ultra-low 1A. 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 three gain versions:25V/V (MAX9938T), 50V/V (MAX9938F), and 100V/V (MAX9938H).

The three gain selections of MAX9938 offer flexibility in the choice of the external current-sense resistor. The very low 500V (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) and 5-pin SOT23 packages, specified for operation over the -40°C to +85°C extended temperature range.