SparkFun Current Sensor - INA228 (Qwiic)

The SparkFun Current Sensor - INA228 (Qwiic) offers a seamless solution for precise DC current and power monitoring via I2C. Featuring the INA228 digital power monitor from Texas Instruments, it measures current, voltage, power, temperature, energy, and charge accumulation using a 20-bit delta-sigma ADC. With both Qwiic connectors and a 3-pin screw terminal, it supports solderless integration, while through-hole pins allow for custom shunt resistor values. The board also includes a plated through-hole header for those who prefer soldered connections, breaking out power, communication pins (SDA/SCL), and an alert pin for versatile use.

This sensor is ideal for applications requiring high-precision power monitoring, such as in sensitive electronic projects. The 20-bit ADC ensures stable and precise readings, making it suitable for environments with fluctuating conditions between -40°C and +125°C. The alert pin can notify users of completed conversions or when thresholds for voltage, current, power, or temperature are exceeded, offering an additional layer of protection for your setup.

One of the standout benefits of this sensor is its high accuracy, with a power monitoring accuracy of 0.5% full scale and an energy and charge accuracy of 1.0% full scale. With a maximum common mode rejection of 154dB and low offset drift, it maintains true current measurements even in challenging conditions. Advanced features like threshold alerts and fast response times ensure sensitive electronics are protected, while deep analysis capabilities allow for tracking accumulated energy and charge directly on the chip.

These features enable the main processor to stay in a low-power sleep state until a power event necessitates its attention, optimizing energy efficiency. Whether you are developing a new project or enhancing an existing one, this sensor provides the precision and reliability needed for effective power management.