Maxim Integrated MAX4172GUA+ High-Side Current-Sense Amplifier

The MAX4172GUA+ from Maxim Integrated is a precision, high-side current-sense amplifier designed to monitor the current flow in power management applications. This compact and efficient device is ideal for a wide range of applications, including battery management, portable devices, and industrial control systems.

The MAX4172GUA+ operates over a wide supply voltage range of 3V to 36V, making it suitable for both low and high voltage systems. Its high-side current sensing capability allows for the detection of current through a shunt resistor placed in the supply line, enabling the monitoring of load current without interfering with the ground path of the load.

With its low input offset voltage, the MAX4172GUA+ provides accurate current measurement even at low current levels. This precision is crucial for systems that require consistent and reliable current monitoring to ensure performance and safety. The device also features a high voltage gain of 20V/V, which amplifies the voltage across the shunt resistor to a level that can be easily read by an analog-to-digital converter (ADC).

One of the key advantages of the MAX4172GUA+ is its small form factor. Housed in an 8-pin µMAX package, it occupies minimal space on a printed circuit board (PCB), which is essential for compact and portable electronic designs. Additionally, the device offers a low quiescent current, contributing to the overall energy efficiency of the end application.

For design flexibility, the MAX4172GUA+ includes a voltage output that is directly proportional to the current passing through the shunt resistor. This allows for easy interfacing with microcontrollers and other digital systems. Moreover, the device is fully specified over the extended industrial temperature range of -40°C to +85°C, ensuring reliable performance in harsh environments.

In summary, the MAX4172GUA+ is a robust and precise high-side current-sense amplifier that offers designers a compact, efficient, and versatile solution for current monitoring across a diverse array of applications.