INA220-Q1 Monitor Datasheet

INA220-Q1 Datasheet, PDF, Equivalent


Part Number

INA220-Q1

Description

I2C-Compatible Current/Power Monitor

Manufacture

etcTI

Total Page 30 Pages
Datasheet
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INA220-Q1
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INA220-Q1
SLOS785B – JUNE 2012 – REVISED MARCH 2016
INA220-Q1 Automotive Grade, 26-V, Bi-Directional, Zero-Drift,
Low- or High-Side, I2C-Compatible Current/Power Monitor
1 Features
1 Qualified for Automotive Applications
• AEC-Q100 Qualified with the following results:
– Device Temperature Grade 1: –40°C to
+125°C Ambient Operating Temperature
Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C3B
• 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
• User-Programmable Calibration
• Fast (2.56-MHz) I2C- or SMBUS-Compatible
Interface
• VSSOP-10 Package
2 Applications
• Electric Power Steering (EPS) Systems
• Body Control Modules
• Brake Systems
• Electronic Stability Control (ESC) Systems
3 Description
The INA220-Q1 device is a current shunt and power
monitor with an I2C- or SMBUS-compatible interface.
The INA220-Q1 device 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-Q1 device allows it to be used in
systems with low-side sensing.
The INA220-Q1 device 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-Q1 device
operates from –40°C to +125°C.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA220-Q1
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 26 V)
General Load, Low- or High-Side Sensing
CBYPASS
0.1 µF
3.3 V to
5V
High-
Side
Shunt
Bus Voltage Input
VS (Supply Voltage)
INA220-Q1
Load
Low-
Side
Shunt
R2F
R1F CF
VIN+
V
I
VIN-
GND
ADC
x Power Register
Current Register
Voltage Register
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-Q1
INA220-Q1
SLOS785B – JUNE 2012 – REVISED MARCH 2016
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 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........................................ 10
8.5 Programming .......................................................... 11
8.6 Register Maps ......................................................... 18
9 Application and Implementation ........................ 25
9.1 Application Information............................................ 25
9.2 Typical Application .................................................. 25
9.3 System Examples ................................................... 28
10 Power Supply Recommendations ..................... 30
11 Layout................................................................... 30
11.1 Layout Guidelines ................................................. 30
11.2 Layout Example .................................................... 30
12 Device and Documentation Support ................. 31
12.1 Related Documentation......................................... 31
12.2 Community Resources.......................................... 31
12.3 Trademarks ........................................................... 31
12.4 Electrostatic Discharge Caution ............................ 31
12.5 Glossary ................................................................ 31
13 Mechanical, Packaging, and Orderable
Information ........................................................... 31
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (June 2012) to Revision B
Page
• Changed part number to INA220-Q1...................................................................................................................................... 1
• 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 "Two-wire" to "I2C- or SMBUS-compatible" throughout document ......................................................................... 1
• Deleted the Ordering Information table ................................................................................................................................. 1
• Corrected errors in graphics ................................................................................................................................................... 1
• Added automotive part numbers to Related Products............................................................................................................ 3
• Changed pin names in Pin Configuration and Functions ...................................................................................................... 3
• Added common-mode definition to Absolute Maximum Ratings ........................................................................................... 4
• Changed IN+ and IN– pin input impedance to input bias current ......................................................................................... 5
• Changed Power register to Bus Voltage register ................................................................................................................ 10
• Replaced Programming the INA220B-Q1 with Programming the INA220-Q1 Calibration Register .................................... 12
• Replaced PROGRAMMING THE INA220 POWER MEASUREMENT ENGINE with Calibration Register and Scaling ..... 12
• Updated Table 2 based on one-time sample of devices ...................................................................................................... 17
• Changed Power register to Bus Voltage register ................................................................................................................ 23
• Corrected register values in Detailed Design Procedure and Table 8 ................................................................................. 26
• Changed Configure, Measure, and Calculate Example table to Table 8 and removed first column ................................... 26
Changes from Original (June 2012) to Revision A
Page
• Device went from preview to production ................................................................................................................................ 1
2 Submit Documentation Feedback
Product Folder Links: INA220-Q1
Copyright © 2012–2016, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community INA220-Q1 SLOS785B – JUNE 2012 – REVISED MARCH 2016 INA220-Q1 A utomotive Grade, 26-V, Bi-Directional, Zero-Drift, Low- or High-Side, I2C-Comp atible Current/Power Monitor 1 Feature s •1 Qualified for Automotive Applica tions • AEC-Q100 Qualified with the f ollowing results: – Device Temperatur e Grade 1: –40°C to +125°C Ambient Operating Temperature Range – Device HBM ESD Classification Level H2 – Dev ice CDM ESD Classification Level C3B High- or Low-Side Sensing • Senses Bus Voltages from 0 V to 26 V • Repor ts Current, Voltage, and Power • 16 P rogrammable Addresses • High Accuracy : 0.5% (Maximum) Over Temperature • U ser-Programmable Calibration • Fast ( 2.56-MHz) I2C- or SMBUS-Compatible Inte rface • VSSOP-10 Package 2 Applicatio ns • Electric Power Steering (EPS) Sy stems • Body Control Modules • Brak e Systems • Electronic Stability Control (ESC) Systems 3 Description The INA220-Q1 device is a current.
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