Maxim Integrated MAX9938HEUK+T Precision Current-Sense Amplifier

The MAX9938HEUK+T from Maxim Integrated is a high-accuracy, low-power current-sense amplifier that is an essential component for applications requiring precise current monitoring. This device is particularly well-suited for portable devices, power management systems, and battery-operated electronics where efficiency and battery life are critical.

With its wide input common-mode voltage range of -0.1V to +28V, the MAX9938HEUK+T is versatile for both high-side and low-side current sensing. This feature allows the device to operate in a variety of systems without the need for additional components or complex configurations. The common-mode range also ensures that the amplifier remains functional even when the system experiences voltage swings or transients, making it reliable for industrial environments and automotive applications.

The precision of the MAX9938HEUK+T is one of its key attributes. It boasts a low input offset voltage of only 250µV (max) and a gain error of just 0.5% (max), which enables accurate current measurement across the entire operating temperature range from -40°C to +125°C. This precision ensures that the device can be used in applications that require stringent power monitoring, such as battery charging and management systems, power supply control, and overcurrent protection circuits.

Energy efficiency is another hallmark of the MAX9938HEUK+T. It features a quiescent current of only 25µA, which minimizes the power consumption of the monitoring circuitry. This low power draw is particularly beneficial in battery-powered applications, where extending the battery life is of utmost importance.

Furthermore, the MAX9938HEUK+T comes in a compact 5-pin SOT-23 package, making it an excellent choice for space-constrained applications. The small footprint allows designers to incorporate current sensing into their designs without compromising on board space.

In summary, the Maxim Integrated MAX9938HEUK+T is a highly precise, low-power current-sense amplifier designed for a wide range of applications. Its robust performance and compact size make it an ideal choice for designers looking to implement reliable current monitoring in their systems.