Maxim Integrated MAX4080FAUA+T High-Side Current-Sense Amplifier

The MAX4080FAUA+T from Maxim Integrated is a sophisticated high-side current-sense amplifier that offers a precise, low-cost solution for a variety of applications requiring current monitoring. This compact device is designed to monitor the current flowing through a shunt resistor placed in the high side of a circuit, enabling the measurement of load current without interrupting the ground path of the load.

The MAX4080FAUA+T operates over a wide supply voltage range of 4.5V to 76V, making it suitable for both low and high-voltage applications. It offers a high level of integration, incorporating a precision amplifier with a gain of 20V/V, which provides a high output voltage without the need for external gain-setting resistors. This feature simplifies the design and reduces the bill of materials for the end product.

With its ability to sense millivolt drops across shunt resistors, the MAX4080FAUA+T boasts a low input offset voltage, which translates to accurate current measurement even at very low current levels. This accuracy is maintained across the entire operating temperature range, from -40°C to +125°C, ensuring reliable performance in a wide range of environments.

Another key feature of this device is its high bandwidth of 500kHz, which allows it to respond quickly to changes in load current. This makes the MAX4080FAUA+T an excellent choice for fast, dynamic applications such as transient load detection and management.

The MAX4080FAUA+T is offered in an 8-pin µMAX package, which is optimized for space-constrained applications. The small footprint of the package, combined with the low external part count required for operation, makes it ideal for portable devices, battery management systems, power management, and overcurrent protection circuits.

Overall, the Maxim Integrated MAX4080FAUA+T is a versatile and reliable component for designers looking to implement accurate current-sensing solutions in their projects with minimal design complexity and high performance.