INA220

Product Folder Order Now Technical Documents Tools & Software Support & Community INA220 SBOS459E – JUNE 2009 – REVISED JANUARY 2016 INA220 High- or Low-Side, Bidirectional Current and Power Monitor With Two-Wire Interface 1 Features 1 High- or Low-Side Sensing Senses Bus Voltages from 0 V to 26 V Reports Current, Voltage, and Power 16 Programmable Addresses High Accuracy: 0.5% (Maximum) Over Temperature (INA220B) User-Programmable Calibration Fast (2.56-MHz) I2C- or SMBUS-Compatible Interface VSSOP-10 Package 2 Applications Servers Telecom Equipment Notebook Computers Power Management Battery Chargers Automotive Power Supplies Test Equipment 3 Description The INA220 is a current shunt and power monitor with an I2C- or SMBUS-compatible interface. The INA220 monitors both shunt drop and supply voltage. A programmable calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calculates power in watts. The I2C- or SMBUS-compatible interface features 16 programmable addresses. The separate shunt input on the INA220 allows it to be used in systems with low-side sensing. The INA220 is available in two grades: A and B. The B grade version has higher accuracy and higher precision specifications. The INA220 senses across shunts on buses that can vary from 0 to 26 V, useful for low-side sensing or CPU power supplies. The device uses a single 3- to 5.5-V supply, drawing a maximum ...