1 Features
• High-side or low-side current sensing
• Operates from a 1.7V to 5.5V power supply
• Reports current, voltage, power, and energy
• Programmable full scale range: 20mV / 80mV
• Input common mode range: –0.3V to 48V
• Current monitoring accuracy:
– 16-bit ADC resolution
– 0.5% gain error (maximum)
– 75μV offset (maximum)
• Power monitoring accuracy:
– 1% full scale (maximum)
• Energy monitoring accuracy:
– 1.5% full scale (maximum)
• Low input bias currents: 5nA (maximum)
• Low disable current: 50nA (maximum)
• Configurable averaging options
• Alert limits for over and under current events
• 1.2V compliant I2C, SMBus interface
• 16-pin selectable addresses
• DSBGA-16 Package (1.5mm × 1.5mm)

2 Applications
• Notebook computers
• Security cameras
• Retail automation
• Power management
• Battery cell monitors and balancers
• Rack servers
• eFuse current and power monitoring

3 Description
The INA2227 device is a dual channel 16-bit
digital current monitor with an I2C/SMBus-compatible
interface that is compliant with digital bus voltages
from 1.2V to 5V. The device monitors the voltage
across an external sense resistor and reports values
for shunt voltage, bus voltage, current, power, and
energy for each channel.
The INA2227 features programmable ADC conversion
times and averaging that is common for all channels.
Each channel has a programmable calibration value
with an internal multiplier that enables direct readouts
of current in amperes, power in watts, and energy
in joules. Each channel has a dedicated VBUS
pin to monitor the bus voltage and can alert on
overcurrent and undercurrent conditions, as well as
on overvoltage and undervoltage conditions. High
input impedance while in current measurement mode
allows use of larger current sense resistors needed to
measure small value system currents.
The INA2227 senses current on common-mode
bus voltages that can vary from –0.3V to 48V,
independent of the supply voltage. The device
operates from a single 1.7V to 5.5V supply, drawing
a typical supply current of 400μA in normal operation.
The device can be placed in a low-power standby
mode where the typical operating current is 2.5μA
and can be fully disabled using the enable pin to
achieve an supply current less than 50nA. The device
is specified over the operating temperature range
between –40°C and 125°C and features up to 16
programmable addresses.