LM65680-Q1

The LM65680-Q1 is a high-precision, automotive-grade analog front-end (AFE) designed for current sensing applications in harsh environments. It features a 24-bit sigma-delta ADC with integrated programmable gain amplifier (PGA), enabling accurate measurement of small differential voltages across shunt resistors. The device supports a wide supply voltage range from 3.0 V to 5.5 V, making it suitable for various vehicle power systems. This AFE includes advanced signal conditioning circuitry such as offset calibration, temperature compensation, and digital filtering to minimize noise and drift over time and temperature. It offers a low input bias current of less than 1 nA, ensuring minimal loading on the sensor while maintaining high accuracy. With a maximum non-linearity error of ±0.05% and a typical resolution of 1 µV, the LM65680-Q1 delivers exceptional precision for critical applications like battery management systems (BMS) and motor control. The device supports multiple communication interfaces including I²C and SPI, allowing flexible integration into existing system architectures. Its robust design meets AEC-Q100 Grade 1 qualification standards, ensuring reliability under extreme conditions such as high temperature, vibration, and EMI. The internal self-test and diagnostic features enhance system safety by detecting faults and providing early warnings. Designed specifically for automotive applications, the LM65680-Q1 operates reliably across an extended temperature range from -40°C to +125°C. It is commonly used in electric vehicles (EVs), hybrid electric vehicles (HEVs), and industrial motor drives where precise current monitoring is essential for efficiency, safety, and compliance with regulatory standards. Its ability to handle both high-side and low-side shunt configurations adds versatility to system design.