AIS3624DQ

The AIS3624DQ is a high-performance analog front-end (AFE) integrated circuit manufactured by STMicroelectronics, designed for precision current sensing in industrial and automotive applications. It features a low-offset, high-accuracy differential amplifier with an input common-mode range that extends from ground to the supply voltage, enabling flexible integration with various power topologies including buck converters and motor drives. This device incorporates a programmable gain amplifier (PGA) with selectable gains of 10, 20, or 50, allowing users to optimize signal conditioning based on the magnitude of the sensed current. Its internal 16-bit sigma-delta ADC provides high resolution and excellent noise performance, making it suitable for applications requiring accurate measurement over a wide dynamic range. The AFE also includes an onboard reference buffer and digital filtering capabilities, reducing external component count while maintaining system accuracy. Built for robust operation in harsh environments, the AIS3624DQ supports a supply voltage range from 3.0 V to 5.5 V and operates reliably across a temperature range of -40°C to +125°C. It offers low quiescent current consumption, enhancing energy efficiency in battery-powered systems. The chip integrates diagnostic functions such as open-load detection and overcurrent protection, improving system reliability and safety. The AIS3624DQ is commonly used in motor control systems, power supplies, battery management systems (BMS), and industrial automation equipment where precise current monitoring is critical. Its compatibility with microcontrollers via SPI interface simplifies communication and enables real-time data acquisition and control. Additionally, the device’s compact QFN package (4x4 mm) ensures minimal PCB footprint, ideal for space-constrained designs. With its combination of high precision, integrated functionality, and robust design, the AIS3624DQ delivers reliable performance in demanding applications across automotive, industrial, and consumer electronics sectors.