1 Features
. High-side or low-side current sensing
. Operates from a 1.7-V to 5.5-V power supply
. Reports current, voltage and power
. Programmable full scale range: 20mV / 80mV
. Input common mode range: .0.3 V to 28 V
. Current monitoring accuracy:
. 12-bit ADC resolution
. 0.5% gain error (maximum)
. 100-μV offset (maximum)
. Low input bias current: 10 nA (maximum)
. Configurable averaging options
. General call addressing allows conversion
synchronization among devices
. Alert limits for over and under current events
. 1.2-V compliant I2C, SMBus interface
. Two device address options with a 4-pin selectable
address
. DSBGA-8 Package (0.745 mm × 1.508 mm)
. Operating temperature: .40°C and +125°C

2 Applications
• Mobile phones
• Smart speakers
• Wearables
• Battery chargers
• Power management
• Battery cell monitors and balancers
• Rack servers

3 Description
The INA234 device is a 12-bit digital current monitor
with an I2C/SMBus-compatible interface that is
compliant with a wide range of digital bus voltages
such as 1.2 V, 1.8 V, 3.3 V, and 5.0 V. The device
monitors the voltage across an external sense resistor
and reports values for current, bus voltage, and
power.
The INA234 features programmable ADC conversion
times and averaging. The device also has a
programmable calibration value with an internal
multiplier that enables direct readouts of current in
amperes and power in watts. The device monitors
the bus voltage present on the IN– pin and can
alert on overcurent and undercurrent conditions as
well as 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 INA234 senses current on common-mode bus
voltages that can vary from –0.3 V to 28 V,
independent of the supply voltage. The device
operates from a single 1.7-V to 5.5-V supply, drawing
a typical supply current of 300 μA in normal operation.
The device can be placed in a low-power standby
mode where the typical operating current is 2.2 μA.