INA220 Monitor Datasheet

INA220 Datasheet, PDF, Equivalent


Part Number

INA220

Description

Bidirectional Current and Power Monitor

Manufacture

etcTI

Total Page 30 Pages
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INA220
SBOS459E – JUNE 2009 – REVISED JANUARY 2016
INA220 High- or Low-Side, Bidirectional Current and Power Monitor
With Two-Wire Interface
1 Features
1 High- or Low-Side Sensing
• Senses Bus Voltages from 0 V to 26 V
• Reports Current, Voltage, and Power
• 16 Programmable Addresses
• High Accuracy: 0.5% (Maximum) Over
Temperature (INA220B)
• User-Programmable Calibration
• Fast (2.56-MHz) I2C- or SMBUS-Compatible
Interface
• VSSOP-10 Package
2 Applications
• Servers
• Telecom Equipment
• Notebook Computers
• Power Management
• Battery Chargers
• Automotive
• Power Supplies
• Test Equipment
3 Description
The INA220 is a current shunt and power monitor
with an I2C- or SMBUS-compatible interface. The
INA220 monitors both shunt drop and supply voltage.
A programmable calibration value, combined with an
internal multiplier, enables direct readouts in
amperes. An additional multiplying register calculates
power in watts. The I2C- or SMBUS-compatible
interface features 16 programmable addresses. The
separate shunt input on the INA220 allows it to be
used in systems with low-side sensing.
The INA220 is available in two grades: A and B. The
B grade version has higher accuracy and higher
precision specifications.
The INA220 senses across shunts on buses that can
vary from 0 to 26 V, useful for low-side sensing or
CPU power supplies. The device uses a single 3- to
5.5-V supply, drawing a maximum of 1 mA of supply
current. The INA220 operates from –40°C to 125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA220
VSSOP (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Supply (0 to 26V)
General Load, Low- or High-Side Sensing
CBYPASS
0.1µF
+3.3V to
+5V
High-
Side
Shunt
Load
Low-
Side
Shunt
Bus Voltage Input
R2F
R1F CF
VIN+
V
I
VIN-
GND
ADC
× Power Register
Current Register
Voltage Register
VS (Supply Voltage)
INA220
I2C-/SMBUS-
Compatible
Interface
SDA
SCL
A0
A1
DATA
CLK
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.

INA220
INA220
SBOS459E – JUNE 2009 – REVISED JANUARY 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Related Products ................................................... 4
6 Pin Configuration and Functions ......................... 4
7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5
7.2 ESD Ratings.............................................................. 5
7.3 Recommended Operating Conditions....................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Bus Timing Diagram Definitions................................ 7
7.7 Typical Characteristics .............................................. 8
8 Detailed Description ............................................ 10
8.1 Overview ................................................................. 10
8.2 Functional Block Diagram ....................................... 10
8.3 Feature Description................................................. 10
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 ..................... 29
11 Layout................................................................... 29
11.1 Layout Guidelines ................................................. 29
11.2 Layout Example .................................................... 29
12 Device and Documentation Support ................. 30
12.1 Related Documentation......................................... 30
12.2 Community Resources.......................................... 30
12.3 Trademarks ........................................................... 30
12.4 Electrostatic Discharge Caution ............................ 30
12.5 Glossary ................................................................ 30
13 Mechanical, Packaging, and Orderable
Information ........................................................... 30
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (September 2010) to Revision E
Page
• Added ESD Ratings table, Feature Description section, Device Functional Modes section, Application and
Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation
Support section, and Mechanical, Packaging, and Orderable Information section ............................................................... 1
• Changed front page diagram. ................................................................................................................................................ 1
• Changed pin names in the pin description. ............................................................................................................................ 4
• Changed the temperature values in the Absolute Maximum Ratings table ........................................................................... 5
• Changed Ambient temperature from –25 to –40 in the MIN column. .................................................................................... 5
• Deleted Temperature Range parameters from Electrical Characteristics. ............................................................................. 7
• Changed I2C timing spec change based on characterization data. ...................................................................................... 7
Changes from Revision C (September, 2009) to Revision D
Page
• Changed High Accuracy bullet in Features from 1% to 0.5% for B-grade device.................................................................. 1
• Added new paragraph to Description regarding A- and B-grade versions of the device ....................................................... 1
• Added new row to Packaging Information table to show new B-grade device ...................................................................... 4
• Added B-grade columns in Electrical Characteristics for MIN, TYP and MAX values ........................................................... 6
• Changed Current Sense Gain Error over temperature specification from 10 ppm/°C to 1m%/°C ......................................... 6
• Added Configure/Measure/Calculate Example..................................................................................................................... 25
2 Submit Documentation Feedback
Product Folder Links: INA220
Copyright © 2009–2016, Texas Instruments Incorporated


Features Product Folder Order Now Technical Doc uments Tools & Software Support & Com munity INA220 SBOS459E – JUNE 2009 REVISED JANUARY 2016 INA220 High- or Low-Side, Bidirectional Current and Po wer Monitor With Two-Wire Interface 1 Features •1 High- or Low-Side Sensing • Senses Bus Voltages from 0 V to 26 V • Reports Current, Voltage, and Po wer • 16 Programmable Addresses • H igh Accuracy: 0.5% (Maximum) Over Tempe rature (INA220B) • User-Programmable Calibration • Fast (2.56-MHz) I2C- or SMBUS-Compatible Interface • VSSOP-1 0 Package 2 Applications • Servers Telecom Equipment • Notebook Comput ers • Power Management • Battery Ch argers • Automotive • Power Supplie s • Test Equipment 3 Description The INA220 is a current shunt and power mo nitor with an I2C- or SMBUS-compatible interface. The INA220 monitors both shu nt drop and supply voltage. A programma ble calibration value, combined with an internal multiplier, enables direct readouts in amperes. An additional multiplying register calcul.
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