ATA5702

The ATA5702 is a high-performance, low-power analog front-end (AFE) designed for precise current sensing in automotive and industrial applications. It integrates a fully differential amplifier with programmable gain, enabling accurate measurement of small voltage drops across shunt resistors. The device supports a wide supply voltage range from 3.0 V to 5.5 V, making it compatible with various power systems, including 12 V and 24 V automotive networks. Key features include a configurable gain setting from 1 to 64, allowing flexibility in adapting to different load currents and sensor configurations. Its high common-mode rejection ratio (CMRR) ensures reliable operation even in electrically noisy environments, such as those found in engine compartments or motor control units. The ATA5702 also includes an internal reference buffer and a precision bandgap reference, minimizing external component count while maintaining accuracy over temperature and supply variations. The chip operates with a low quiescent current of typically 200 µA, contributing to energy efficiency in battery-powered or always-on systems. It supports both single-supply and split-supply operation modes, enhancing design versatility. Integrated diagnostic functions, such as open-load detection and internal self-test, improve system reliability and support compliance with functional safety standards like ISO 26262. In terms of applications, the ATA5702 is ideal for use in electric vehicle (EV) battery management systems (BMS), DC-DC converters, motor drives, and industrial power supplies where precise current monitoring is critical. It is commonly employed in traction inverters, onboard chargers, and powertrain control modules due to its robust performance under harsh conditions. The device is housed in a compact 8-pin SOIC package, offering a space-efficient solution for densely populated PCB designs. It meets AEC-Q100 Grade 1 qualification, ensuring reliability in automotive environments with extended temperature ranges from -40°C to +125°C. With its combination of high accuracy, low power consumption, and robustness, the ATA5702 provides a dependable interface between current sensors and microcontrollers or digital signal processors in demanding real-world applications.