1 Features
1• Senses Bus Voltages from 0 to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over
Temperature (INA219B)
• Filtering Options
• Calibration Registers
• SOT23-8 and SOIC-8 Packages

2 Applications
• Servers
• Telecom Equipment
• Notebook Computers
• Power Management
• Battery Chargers
• Welding Equipment
• Power Supplies
• Test Equipment

3 Description
The INA219 is a current shunt and power monitor
with an I2C- or SMBUS-compatible interface. The device monitors both shunt voltage drop and bus
supply voltage, with programmable conversion times
and filtering. A programmable calibration value,
combined with an internal multiplier, enables direct
readouts of current in amperes. An additional multiplying register calculates power in watts. The
I2C- or SMBUS-compatible interface features 16
programmable addresses.
The INA219 is available in two grades: A and B. The
B grade version has higher accuracy and higher
precision specifications.
The INA219 senses across shunts on buses that can
vary from 0 to 26 V. The device uses a single 3- to
5.5-V supply, drawing a maximum of 1 mA of supply current. The INA219 operates from –40°C to 125°C.