INA231

Product Folder Order Now Technical Documents Tools & Software Support & Community INA231 SBOS644C – FEBRUARY 2013 – REVISED MARCH 2018 INA231 High- or Low-Side Measurement, Bidirectional Current and Power Monitor With 1.8-V I2C Interface 1 Features 1 Bus Voltage Sensing From 0 V to 28 V High- or Low-Side Sensing Current, Voltage, and Power Reporting High Accuracy: – 0.5% Gain Error (Max) – 50-μV Offset (Max) Configurable Averaging Options Programmable Alert Threshold 1.8-V I2C Compliant Power-Supply Operation: 2.7 V to 5.5 V Start-Up Mode Options: – INA231A: Active Conversion – INA231B: Low-Current Power Down 2 Applications Smartphones Tablets Servers Computers Power Management Battery Chargers Power Supplies Test Equipment 3 Description The INA231 is a current-shunt and power monitor with a 1.8-V compliant I2C interface that features 16 programmable addresses. The INA231 monitors both shunt voltage drops and bus supply voltage, providing increased protection by asserting the ALERT pin if the values are outside the programmed range. Programmable calibration value, conversion time, and averaging, combined with an internal multiplier, enable direct readouts of current in amperes and power in watts, thus reducing host processing. The INA231 senses current on bus voltages that vary from 0 V to 28 V, with the device powered from a single 2.7-V to 5.5-V supply, drawing 330 μA (typical) of supply current. The INA231 is specified over the opera...