Maxim Integrated MAX4373HEUA High-Side Current-Sense Amplifier

The Maxim Integrated MAX4373HEUA is a compact, high-accuracy, high-side current-sense amplifier that is ideal for a wide range of applications requiring precise current monitoring. Designed to operate over a wide supply voltage range from 2.7V to 28V, this current-sense amplifier is suitable for both portable and automotive applications, among others.

This device features a precision voltage reference and an operational amplifier (op-amp) that compares the voltage difference across an external sense resistor to the reference. The MAX4373HEUA translates the voltage across the sense resistor into a proportional output voltage. Thanks to its high-side sensing capability, the MAX4373HEUA can measure the current flowing through a load without interfering with the ground path, which is particularly useful in systems where ground integrity is crucial.

The MAX4373HEUA comes in a small 8-pin µMAX package, making it an excellent choice for space-constrained applications. It offers a fixed gain of 20V/V, which simplifies the design process by eliminating the need for external gain-setting resistors. The high accuracy of this device, with a low input offset voltage, ensures that current measurements are reliable and precise, which is critical for system monitoring and control.

Additional features of the MAX4373HEUA include a fast 7µs response time, which allows for quick reaction to overcurrent conditions, and an input common-mode voltage range that extends from 0V to 28V, independent of the supply voltage. This versatility enables the MAX4373HEUA to be used in systems with varying ground potentials. Moreover, the device is equipped with a current output that can drive an analog-to-digital converter (ADC) directly, facilitating digital monitoring of the current.

Whether it's for battery management, power management, or load detection and management, the Maxim Integrated MAX4373HEUA offers designers a reliable and efficient solution for high-side current sensing. Its ease of use, combined with its robust feature set, makes it an essential component for any precision current measurement task.