INA219_17 Datasheet, PDF (1/37 Pages) Texas Instruments – Bidirectional Current/Power Monitor With I2C Interface

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
INA219
SBOS448G – AUGUST 2008 – REVISED DECEMBER 2015
INA219 Zerø-Drift, Bidirectional Current/Power Monitor With I²C Interface
1 Features
•1 Senses Bus Voltages from 0 to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over
Temperature (INA219B)
• Filtering Options
• Calibration Registers
• SOT23-8 and SOIC-8 Packages
2 Applications
• Servers
• Telecom Equipment
• Notebook Computers
• Power Management
• Battery Chargers
• Welding Equipment
• Power Supplies
• Test Equipment
3 Description
The INA219 is a current shunt and power monitor
with an I²C- or SMBUS-compatible interface. The
device monitors both shunt voltage drop and bus
supply voltage, with programmable conversion times
and filtering. A programmable calibration value,
combined with an internal multiplier, enables direct
readouts of current in amperes. An additional
multiplying register calculates power in watts. The
I²C- or SMBUS-compatible interface features 16
programmable addresses.
The INA219 is available in two grades: A and B. The
B grade version has higher accuracy and higher
precision specifications.
The INA219 senses across shunts on buses that can
vary from 0 to 26 V. The device uses a single 3- to
5.5-V supply, drawing a maximum of 1 mA of supply
current. The INA219 operates from –40°C to 125°C.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA219
SOIC (8)
SOT-23 (8)
3.91 mm × 4.90 mm
1.63 mm × 2.90 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_IN+ V_IN-
Simplified Schematic
V_S
(Supply Voltage)
INA219
PGA
ADC
´
Power Register
Current Register
Voltage Register
I²C-/SMBUS-
Compatible
Interface
Data
CLK
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.