MAX4373HESA+ High-Side Current-Sense Amplifier

The MAX4373HESA+ from Maxim Integrated is a high-accuracy, low-cost, high-side current-sense amplifier designed for a wide range of applications, including portable PCs, cell phones, and other systems where battery/DC current monitoring is critical. This precision current-sense amplifier operates over a wide supply voltage range from 2.7V to 28V and is capable of sensing the current via the voltage drop across a shunt resistor placed in the high side of the circuit, enabling it to monitor the load current without interfering with the ground path of the load.

One of the key features of the MAX4373HESA+ is its ability to amplify the differential voltage across the shunt resistor and output a voltage proportional to the current passing through it. This product comes with a fixed gain of 20V/V, offering a straightforward solution for current monitoring applications without the need for external gain-setting components.

The device offers high accuracy with a low input offset voltage, which makes it ideal for reading small voltage drops across shunt resistors. The MAX4373HESA+ also includes a precision voltage reference and an integrated comparator, which can be used for setting overcurrent thresholds or producing a warning signal for system protection purposes.

With its small 8-pin SO package, the MAX4373HESA+ is designed to save space on PCBs, making it suitable for compact electronic assemblies. The device is also specified for the extended industrial temperature range (-40°C to +85°C), ensuring reliable performance in a wide range of operating conditions.

Overall, the MAX4373HESA+ is an excellent choice for designers looking for a simple, reliable, and accurate solution for current sensing in their power management systems. Its ease of use, combined with its robust feature set, makes it a versatile component for any application requiring high-side current monitoring.