Maxim Integrated MAX9938HEUK+ Precision Current-Sense Amplifier

The Maxim Integrated MAX9938HEUK+ is a high-performance, precision current-sense amplifier that offers an excellent solution for power management and battery monitoring in a wide array of applications. This device is specifically designed to accurately measure small differential voltages across a current-sense resistor while rejecting large common-mode voltages, making it ideal for current monitoring in battery-powered systems, portable devices, and industrial equipment.

The MAX9938HEUK+ features a wide input common-mode range of -0.1V to +28V, which allows for versatile use in systems with varying power supply voltages. Its precision is further enhanced by a low input offset voltage of just 250µV (max) and an input bias current of only 1µA (max), ensuring accurate current measurement even at low levels.

This current-sense amplifier is capable of operating from a single 2.7V to 28V supply, or a dual ±1.35V to ±14V supply, providing flexibility in system design. The MAX9938HEUK+ also boasts a high gain accuracy of ±0.5% (max), which contributes to its reliable performance in critical applications where precise current control and monitoring are necessary.

For ease of integration into various circuit designs, the MAX9938HEUK+ comes in a small 5-pin SOT23 package, which is not only space-efficient but also simplifies the PCB layout. Its tiny footprint makes it an excellent choice for space-constrained applications such as handheld devices, wearables, and compact power management modules.

Additional features of the MAX9938HEUK+ include a 500kHz bandwidth that allows for fast response times in dynamic systems, and a quiescent current of only 20µA (typ), which is advantageous for power-sensitive applications. The device also includes a shutdown mode to further reduce power consumption when not in active use.

In summary, the Maxim Integrated MAX9938HEUK+ is a versatile, high-precision current-sense amplifier that offers reliable performance for a variety of applications requiring accurate current measurement and monitoring. Its compact size, low power consumption, and high accuracy make it a top choice for designers looking to enhance their power management systems.