SBOS743A
July 2015 – May 2020
INA226-Q1
PRODUCTION DATA.
1
Features
2
Applications
3
Description
Device Images
High-Side or Low-Side Sensing Application
4
Revision History
5
Pin Configuration and Functions
Pin Functions
6
Specifications
6.1
Absolute Maximum Ratings
6.2
ESD Ratings
6.3
Recommended Operating Conditions
6.4
Thermal Information
6.5
Electrical Characteristics
6.6
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Basic ADC Functions
7.3.1.1
Power Calculation
7.3.1.2
Alert Pin
7.4
Device Functional Modes
7.4.1
Averaging and Conversion Time Considerations
7.4.2
Filtering and Input Considerations
7.5
Programming
7.5.1
Programming the Calibration Register
7.5.2
Programming the Power Measurement Engine
7.5.2.1
Calibration Register and Scaling
7.5.3
Simple Current Shunt Monitor Usage (No Programming Necessary)
7.5.4
Default Settings
7.5.5
Bus Overview
7.5.5.1
Serial Bus Address
7.5.5.2
Serial Interface
7.5.5.3
Writing to and Reading from the INA226-Q1
7.5.5.3.1
High-Speed I2C Mode
7.5.5.4
SMBus Alert Response
7.6
Register Maps
Table 4.
Register Set Summary
7.6.1
Configuration Register (00h) (Read/Write)
Table 5.
Configuration Register (00h) (Read/Write) Descriptions
7.6.2
Shunt Voltage Register (01h) (Read-Only)
Table 10.
Shunt Voltage Register (01h) (Read-Only) Description
7.6.3
Bus Voltage Register (02h) (Read-Only)
Table 11.
Bus Voltage Register (02h) (Read-Only) Description
7.6.4
Power Register (03h) (Read-Only)
Table 12.
Power Register (03h) (Read-Only) Description
7.6.5
Current Register (04h) (Read-Only)
Table 13.
Current Register (04h) (Read-Only) Register Description
7.6.6
Calibration Register (05h) (Read/Write)
Table 14.
Calibration Register (05h) (Read/Write) Description
7.6.7
Mask/Enable Register (06h) (Read/Write)
Table 15.
Mask/Enable Register (06h) (Read/Write)
7.6.8
Alert Limit Register (07h) (Read/Write)
Table 16.
Alert Limit Register (07h) (Read/Write) Description
7.6.9
Manufacturer ID Register (FEh) (Read-Only)
Table 17.
Manufacturer ID Register (FEh) (Read-Only) Description
7.6.10
Die ID Register (FFh) (Read-Only)
Table 18.
Die ID Register (FFh) (Read-Only) Description
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
High-Side Sensing Circuit Application
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.3
Application Curves
Table 19.
Configuration Register (00h) Settings for (Value = 4025h)
Table 20.
Configuration Register (00h) Settings for (Value = 4005h)
Table 21.
Mask/Enable Register (06h) Settings for and (Value = 8000h)
Table 22.
Alert Limit Register (07h) Settings for and (Value = 7D00)
9
Power Supply Recommendations
10
Layout
10.1
Layout Guidelines
10.2
Layout Example
11
Device and Documentation Support
11.1
Device Support
11.1.1
Development Support
11.2
Support Resources
11.3
Trademarks
11.4
Electrostatic Discharge Caution
11.5
Glossary
12
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DGS|10
MPDS035C
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbos743a_oa
sbos743a_pm
6.6
Typical Characteristics
At T
A
= 25°C, V
VS
= 3.3 V, V
IN+
= 12 V, V
SENSE
= (V
IN+
– V
IN–
) = 0 mV and V
VBUS
= 12 V, unless otherwise noted.
Figure 1.
Frequency Response
Figure 3.
Shunt Input Offset Voltage vs Temperature
Figure 5.
Shunt Input Gain Error Production Distribution
Figure 7.
Shunt Input Gain Error vs Common-Mode Voltage
Figure 9.
Bus Input Offset Voltage vs Temperature
Figure 11.
Bus Input Gain Error vs Temperature
Figure 13.
Input Bias Current vs Temperature
Figure 15.
Active I
Q
vs Temperature
Figure 17.
Active I
Q
vs I
2
C Clock Frequency
Figure 2.
Shunt Input Offset Voltage Production Distribution
Figure 4.
Shunt Input Common-Mode Rejection Ratio vs Temperature
Figure 6.
Shunt Input Gain Error vs Temperature
Figure 8.
Bus Input Offset Voltage Production Distribution
Figure 10.
Bus Input Gain Error Production Distribution
Figure 12.
Input Bias Current vs Common-Mode Voltage
Figure 14.
Input Bias Current vs Temperature, Shutdown
Figure 16.
Shutdown I
Q
vs Temperature
Figure 18.
Shutdown I
Q
vs I
2
C Clock Frequency