INA231 Datasheet, PDF (1/32 Pages) Texas Instruments – High- or Low-Side Measurement, Bidirectional CURRENT/POWER MONITOR with 1.8-V I2C™ Interface

INA231
www.ti.com
SBOS644 – FEBRUARY 2013
High- or Low-Side Measurement,
Bidirectional CURRENT/POWER MONITOR with 1.8-V I²C™ Interface
Check for Samples: INA231
FEATURES
1
•23 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
• Package: 1.68-mm × 1.43-mm, WCSP-12
APPLICATIONS
• Smartphones
• Tablets
• Servers
• Computers
• Power Management
• Battery Chargers
• Power Supplies
• Test Equipment
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.
RELATED PRODUCTS
DESCRIPTION
DEVICE
Current and power monitor with watchdog, peak-
hold, and fast comparator functions
INA209
Zerø-drift, low-cost, analog current shunt monitor
series in small package
INA210, INA211,
INA212, INA213,
INA214
Zerø-drift, bidirectional current power monitor with
two-wire interface
INA219
High or Low-side, bidirectional current and power
monitor with two-wire interface and programmable
alert
INA226
Power Supply
(0 V to 28 V)
High-
Side
Shunt
Load
Low-
Side
Shunt
BUS
INA231
V
I
HIGH-OR LOW-SIDE SENSING
C_BYPASS
0.1 mF
V_S
(Supply Voltage)
ADC
´
Power Register
Current Register
Voltage Register
Alert Register
SDA
SCL
2
IC
Interface
ALERT
A0
A1
GND
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
I²C is a trademark of NXP Semiconductors.
2
All other trademarks are the property of their respective owners.
3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated