INA219 Monitor Datasheet

INA219 Datasheet, PDF, Equivalent


Part Number

INA219

Description

Bidirectional Current/Power Monitor

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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INA219
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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.
VIN+ VIN-
Simplified Schematic
VS
(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.

INA219
INA219
SBOS448G – AUGUST 2008 – REVISED DECEMBER 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Related Products ................................................... 3
6 Pin Configuration and Functions ......................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions....................... 4
7.4 Thermal Information .................................................. 4
7.5 Electrical Characteristics:.......................................... 5
7.6 Bus Timing Diagram Definitions................................ 6
7.7 Typical Characteristics .............................................. 7
8 Detailed Description .............................................. 9
8.1 Overview ................................................................... 9
8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9
8.4 Device Functional Modes........................................ 11
8.5 Programming........................................................... 12
8.6 Register Maps ........................................................ 18
9 Application and Implementation ........................ 25
9.1 Application Information............................................ 25
9.2 Typical Application ................................................. 25
10 Power Supply Recommendations ..................... 27
11 Layout................................................................... 27
11.1 Layout Guidelines ................................................. 27
11.2 Layout Example .................................................... 27
12 Device and Documentation Support ................. 28
12.1 Community Resources.......................................... 28
12.2 Trademarks ........................................................... 28
12.3 Electrostatic Discharge Caution ............................ 28
12.4 Glossary ................................................................ 28
13 Mechanical, Packaging, and Orderable
Information ........................................................... 28
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision F (September 2011) to Revision G
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation
section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and
Mechanical, Packaging, and Orderable Information section ................................................................................................. 1
• Updated Bus Timing Diagram Definitions table. I2C timing table values were previously based on simulation and not
characterized .......................................................................................................................................................................... 6
Changes from Revision E (September 2010) to Revision F
Page
• Changed step 5 and step 6 values in Table 8...................................................................................................................... 26
Changes from Revision D (September 2010) to Revision E
Page
• Updated Packaging Information table .................................................................................................................................... 3
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Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community INA219 SBOS448G – AUGUST 2 008 – REVISED DECEMBER 2015 INA219 Ze rø-Drift, Bidirectional Current/Power Monitor With I2C Interface 1 Features •1 Senses Bus Voltages from 0 to 26 V • Reports Current, Voltage, and Powe r • 16 Programmable Addresses • Hig h Accuracy: 0.5% (Maximum) Over Tempera ture (INA219B) • Filtering Options Calibration Registers • SOT23-8 and SOIC-8 Packages 2 Applications • Ser vers • Telecom Equipment • Notebook Computers • Power Management • Bat tery Chargers • Welding Equipment • Power Supplies • Test Equipment 3 D escription The INA219 is a current shun t and power monitor with an I2C- or SMB US-compatible interface. The device mon itors both shunt voltage drop and bus s upply voltage, with programmable conver sion times and filtering. A programmabl e calibration value, combined with an i nternal multiplier, enables direct readouts of current in amperes. An additional multiplying regis.
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