1 Features

• Senses bus voltages from 0V to 36V

• High-side or low-side sensing

• Reports current, voltage, and power

• High accuracy:

– Gain error: 0.1% (maximum)

– Offset: 10μV (maximum)

• Configurable averaging options

• 16 programmable addresses

• Operates from 2.7V to 5.5V power supply

• 10-pin DGS (VSSOP) package

2 Applications

• Rack servers

• Wireless infrastructure

• High performance computing

• Power management

• Battery cell monitors and balancers

• Power Supplies

• Test Equipment

3 Description

The INA226 is a current shunt and power monitor

with an I2C™- or SMBUS-compatible interface. The

device monitors both a shunt voltage drop and

bus supply voltage. Programmable calibration value,

conversion times, and averaging, combined with an

internal multiplier, enable direct readouts of current in

amperes and power in watts.

The INA226 senses current on common-mode bus

voltages that can vary from 0V to 36V, independent

of the supply voltage. The device operates from

a single 2.7V to 5.5V supply, drawing a typical of

330μA of supply current. The device is specified

over the operating temperature range between –40°C

and 125°C and features up to 16 programmable

addresses on the I2C-compatible interface.