Maxim Integrated MAX4172EUA+ High-Side Current-Sense Amplifier

The Maxim Integrated MAX4172EUA+ is a compact, precision, high-side current-sense amplifier designed for a wide range of applications requiring accurate current monitoring. This device is particularly well-suited for portable PCs, cell phones, and other systems where battery/DC current monitoring is critical. Its ability to sense the current flowing through a shunt resistor situated in the high-side of a circuit enables the MAX4172EUA+ to provide vital information for power management and protection functions.

Featuring a wide input common-mode range of 3V to 28V, the MAX4172EUA+ remains fully functional even under varying supply conditions, making it adaptable to both low and high voltage systems. This flexibility is further enhanced by its low supply current of just 100μA, which is particularly beneficial for battery-operated devices where power conservation is paramount.

The MAX4172EUA+ offers a high level of integration, with a voltage output that directly corresponds to the current through the sense resistor. This output can be easily interfaced with analog-to-digital converters (ADCs) or microcontrollers for further signal processing. The device's precision is underscored by its low input offset voltage, which allows for accurate current measurement without significant error introduction.

Encased in a small 8-pin μMAX package, the MAX4172EUA+ is designed for space-constrained applications. Its compact size does not detract from its performance, as it can handle high-frequency signals with a bandwidth of 200kHz. This makes it suitable for applications that require fast response times and precise current monitoring, such as load detection and battery chargers.

For design flexibility, the MAX4172EUA+ also includes a user-selectable gain setting. By choosing appropriate external gain-setting resistors, designers can tailor the device to a specific current range, optimizing the performance for their particular application. This feature, coupled with its robustness and high accuracy, makes the MAX4172EUA+ a versatile choice for any high-side current-sensing requirement.