INA231_017 Datasheet, PDF (1/44 Pages) Texas Instruments – High- or Low-Side Measurement, Bidirectional Current and Power Monitor With 1.8-V I2C Interface

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INA231
SBOS644A – FEBRUARY 2013 – REVISED JUNE 2017
INA231 High- or Low-Side Measurement, Bidirectional Current and Power Monitor
With 1.8-V I²C™ Interface
1 Features
•1 Bus Voltage Sensing From 0 V to 28 V
• High- or Low-Side Sensing
• Current, Voltage, and Power Reporting
• High Accuracy:
– 0.5% Gain Error (Max)
– 50-μV Offset (Max)
• Configurable Averaging Options
• Programmable Alert Threshold
• 1.8-V I²C Compliant
• Power-Supply Operation: 2.7 V to 5.5 V
• Packages: 1.68-mm × 1.43-mm, WCSP-12
– Low Profile, 0.4-mm Height (YFD Package)
2 Applications
• Smartphones
• Tablets
• Servers
• Computers
• Power Management
• Battery Chargers
• Power Supplies
• Test Equipment
3 Description
The INA231 is a current-shunt and power monitor
with a 1.8-V compliant I²C interface that features 16
programmable addresses. The INA231 monitors both
shunt voltage drops 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 INA231 senses current on buses that vary from 0
V to 28 V, with the device powered from a single 2.7-
V to 5.5-V supply, drawing 330 μA (typical) of supply
current. The INA231 is specified over the operating
temperature range of –40°C to +125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA231
YFF (DSBGA-12)
YFD (DSBGA-12)
1.645 mm x 1.388
mm x 0.625 mm
1.645 mm x 1.388
mm x 0.400 mm
(1) For all available packages, see the package option addendum
at the end of the datasheet.
Power Supply
(0 V to 28 V)
High-or Low-Side Sensing
C_BYPASS
0.1 mF
High-
Side
Shunt
Load
Low-
Side
Shunt
BUS
INA231
V
I
ADC
´
Power Register
Current Register
Voltage Register
Alert Register
V_S
(Supply Voltage)
SDA
SCL
2
IC
Interface
ALERT
A0
A1
GND
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.