INA226AIDGST Datasheet, PDF (1/33 Pages) Texas Instruments – High-or Low-Side Measurement, Bi-Directional CURRENT/POWER MONITOR with I2C Interface

INA226
www.ti.com
SBOS547 – JUNE 2011
High-or Low-Side Measurement,
Bi-Directional CURRENT/POWER MONITOR with I²C™ Interface
Check for Samples: INA226
FEATURES
1
•23 SENSES BUS VOLTAGES FROM 0V TO +36V
• HIGH- OR LOW-SIDE SENSING
• REPORTS CURRENT, VOLTAGE, AND POWER
• HIGH ACCURACY:
– 0.1% Gain Error (Max)
– 10μV Offset (Max)
• CONFIGURABLE AVERAGING OPTIONS
• 16 PROGRAMMABLE ADDRESSES
• OPERATES FROM 2.7 to 5.5V POWER SUPPLY
• MSOP-10 PACKAGE
APPLICATIONS
• SERVERS
• TELECOM EQUIPMENT
• COMPUTERS
• POWER MANAGEMENT
• BATTERY CHARGERS
• POWER SUPPLIES
• TEST EQUIPMENT
DESCRIPTION
The INA226 is a current shunt and power monitor
with an I²C interface. The INA226 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 buses that can vary
from 0V to +36V, while the device obtains its power
from a single +2.7V to +5.5V supply, drawing a
typical of 330μA of supply current. The INA226 is
specified over the operating temperature range
of –40°C to +125°C. The I²C interface features 16
programmable addresses.
RELATED PRODUCTS
DESCRIPTION
DEVICE
Current/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, Bi-Directional Current Power Monitor with
Two-Wire Interface
INA219
High or Low Side, Bi-Directional Current/Power
Monitor with Two-Wire Interface
INA220
Power Supply
(0V to 36V)
High-
Side
Shunt
Load
Low-
Side
Shunt
V_BUS
INA226
V
I
ADC
´
Power Register
Current Register
Voltage Register
Alert Register
C_BYPASS
0.1mF
V_S
(Supply Voltage)
SDA
SCL
2
IC
Interface
Alert
A0
A1
GND
High-or Low-Side Sensing
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 © 2011, Texas Instruments Incorporated