Maxim Integrated MAX471CSA Precision, High-Side Current-Sense Amplifier

The MAX471CSA from Maxim Integrated is a precision, high-side current-sense amplifier that is designed for a wide range of applications requiring accurate current monitoring. This versatile device is ideal for portable devices, battery management systems, and power management applications where space is at a premium and high accuracy is paramount.

With its ability to measure voltage across shunt resistors over a wide range of common-mode voltages, the MAX471CSA can handle systems with high-side currents from a few milliamps to amps. The device operates from a single 3V to 36V supply, or a dual ±15V supply, providing flexibility for various power environments. Its quiescent current is also minimal, making it suitable for power-sensitive applications.

The MAX471CSA features a high accuracy of ±1.5% over the entire temperature range of -40°C to +85°C. This ensures reliable performance under varying environmental conditions. It also boasts a low input offset voltage, which allows the use of small shunt resistor values without sacrificing measurement accuracy, thus minimizing power loss.

Installation is straightforward, requiring no external sense resistor. The device is internally calibrated to sense the current flowing through the package, which simplifies the design and reduces the component count. The MAX471CSA comes in a compact 8-pin SOIC package, making it easy to integrate into space-constrained designs.

For design flexibility, the MAX471CSA offers a high common-mode rejection ratio (CMRR) of 120dB (min) at DC, which is critical for applications where the ground plane may be noisy or fluctuating. Additionally, the device is capable of driving ±5V into a 2kΩ load, allowing it to interface with a wide range of analog-to-digital converters (ADCs) or other input devices.

Maxim Integrated's commitment to quality and reliability is evident in the MAX471CSA, making it a trusted choice for designers looking for a high-performance current-sense amplifier. Whether used in consumer electronics, industrial systems, or automotive applications, the MAX471CSA provides the precision and durability needed for accurate current monitoring.