INA226-Q1 Monitor Datasheet

INA226-Q1 Datasheet, PDF, Equivalent


Part Number

INA226-Q1

Description

I2C Compatible Current/Power Monitor

Manufacture

etcTI

Total Page 30 Pages
Datasheet
Download INA226-Q1 Datasheet


INA226-Q1
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INA226-Q1
SBOS743 – JULY 2015
INA226-Q1 Automotive Grade, 36-V, Bi-Directional, Zero-Drift, High Accuracy, Low- or
High-Side, I2C Compatible Current/Power Monitor with Programmable Over-Current Alert
1 Features
1 AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
– Device HBM ESD Classification 2
– Device CDM ESD Classification C4B
• Senses Bus Voltages From 0 V to 36 V
• High-Side or Low-Side Sensing
• Reports Current, Voltage, and Power
• High Accuracy:
– 0.1% Gain Error (Max)
– 10 μV Offset (Max)
• Configurable Averaging Options
• 16 Programmable Addresses
• Operates from 2.7-V to 5.5-V Power Supply
• 10-Pin, DGS (VSSOP) Package
2 Applications
• HEV/EV Battery Management
• Body Control Modules
• Automatic Lock Motor Control
• Automatic Window Motor Control
• Valve Control
3 Description
The INA226-Q1 is a current shunt and power monitor
with an I2C™- or SMBUS-compatible interface. The
device 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-Q1 senses current on common-mode
bus voltages that can vary from 0 V to 36 V,
independent of the supply voltage. The device
operates from a single 2.7-V to 5.5-V supply, drawing
a typical of 330 μA of supply current. The device is
specified over the operating temperature range
between –40°C and 125°C and features up to 16
programmable addresses on the I2C-compatible
interface.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
INA226-Q1
VSSOP (10)
3.00 mm x 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
High-Side or Low-Side Sensing Application
Power Supply
(0 V to 36 V)
CBYPASS
0.1 mF
High-
Side
Shunt
Load
Low-
Side
Shunt
VBUS
VIN+
VIN–
V
I
ADC
´ Power Register
Current Register
Voltage Register
Alert Register
VS
(Supply Voltage)
SDA
SCL
2
I C or SMBus
Compatible
Interface
Alert
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.

INA226-Q1
INA226-Q1
SBOS743 – JULY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings ............................................................ 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics .............................................. 7
7 Detailed Description ............................................ 10
7.1 Overview ................................................................. 10
7.2 Functional Block Diagram ....................................... 10
7.3 Feature Description................................................. 10
7.4 Device Functional Modes........................................ 13
7.5 Programming .......................................................... 15
7.6 Register Maps ......................................................... 21
8 Application and Implementation ........................ 28
8.1 Application Information............................................ 28
8.2 Typical Applications ................................................ 28
9 Power Supply Recommendations...................... 30
10 Layout................................................................... 30
10.1 Layout Guidelines ................................................. 30
10.2 Layout Example .................................................... 30
11 Device and Documentation Support ................. 31
11.1 Device Support .................................................... 31
11.2 Community Resources.......................................... 31
11.3 Trademarks ........................................................... 31
11.4 Electrostatic Discharge Caution ............................ 31
11.5 Glossary ................................................................ 31
12 Mechanical, Packaging, and Orderable
Information ........................................................... 31
4 Revision History
DATE
July
REVISION
*
NOTES
Initial release.
2 Submit Documentation Feedback
Product Folder Links: INA226-Q1
Copyright © 2015, Texas Instruments Incorporated


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design INA226-Q1 SBOS743 – JULY 2015 INA226-Q1 Automot ive Grade, 36-V, Bi-Directional, Zero-D rift, High Accuracy, Low- or High-Side, I2C Compatible Current/Power Monitor w ith Programmable Over-Current Alert 1 Features •1 AEC-Q100 Qualified With t he Following Results: – Device Temper ature Grade 1: –40°C to 125°C – D evice HBM ESD Classification 2 – Devi ce CDM ESD Classification C4B • Sense s Bus Voltages From 0 V to 36 V • Hig h-Side or Low-Side Sensing • Reports Current, Voltage, and Power • High Ac curacy: – 0.1% Gain Error (Max) – 1 0 μV Offset (Max) • Configurable Ave raging Options • 16 Programmable Addr esses • Operates from 2.7-V to 5.5-V Power Supply • 10-Pin, DGS (VSSOP) Pa ckage 2 Applications • HEV/EV Battery Management • Body Control Modules Automatic Lock Motor Control • Auto matic Window Motor Control • Valve Control 3 Description The INA226-Q1 is a current shunt and power monit.
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