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INA232 48-V, 16-Bit, Current, Voltage, and Power Monitor With an I2C Interface
SBOSAA2
December 2022
INA232
PRODUCTION DATA
CONTENTS
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INA232 48-V, 16-Bit, Current, Voltage, and Power Monitor With an I2C Interface
1
Features
2
Applications
3
Description
4
Revision History
5
Pin Configuration and 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
Timing Requirements (I2C)
6.7
Timing Diagram
6.8
Typical Characteristics
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Integrated Analog-to-Digital Convertor (ADC)
7.3.2
Power Calculation
7.3.3
Low Bias Current
7.3.4
Low Voltage Supply and Wide Common-Mode Voltage Range
7.3.5
ALERT Pin
7.4
Device Functional Modes
7.4.1
Continuous Verses Triggered Operation
7.4.2
Device Shutdown
7.4.3
Power-On Reset
7.4.4
Averaging and Conversion Time Considerations
7.5
Programming
7.5.1
I2C Serial Interface
7.5.2
Writing to and Reading Through the I2C Serial Interface
7.5.3
High-Speed I2C Mode
7.5.4
General Call Reset
7.5.5
General Call Start Byte
7.5.6
SMBus Alert Response
7.6
Register Maps
7.6.1
Device Registers
8
Application and Implementation
8.1
Application Information
8.1.1
Device Measurement Range and Resolution
8.1.2
Current and Power Calculations
8.1.3
ADC Output Data Rate and Noise Performance
8.1.4
Filtering and Input Considerations
8.2
Typical Application
8.2.1
Design Requirements
8.2.2
Detailed Design Procedure
8.2.2.1
Select the Shunt Resistor
8.2.2.2
Configure the Device
8.2.2.3
Program the Shunt Calibration Register
8.2.2.4
Set Desired Fault Thresholds
8.2.2.5
Calculate Returned Values
8.2.3
Application Curves
8.3
Power Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Device Support
9.1.1
Development Support
9.2
Documentation Support
9.2.1
Related Documentation
9.3
Receiving Notification of Documentation Updates
9.4
Support Resources
9.5
Trademarks
9.6
Electrostatic Discharge Caution
9.7
Glossary
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DDF|8
MPDS569D
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbosaa2_oa
sbosaa2_pm
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DATA SHEET
INA232 48-V, 16-Bit, Current, Voltage, and Power Monitor With an I2C Interface
1
Features
High-side or low-side current sensing
Operates from a 1.7-V to 5.5-V power supply
Reports current, voltage and power
Programmable full scale range: 20mV / 80mV
Input common mode range: –0.3 V to 48 V
Current monitoring accuracy:
16-bit ADC resolution
0.3% gain error (maximum)
50-µV offset (maximum)
Low input bias current: 10 nA (maximum)
Configurable averaging options
General call addressing allows conversion synchronization among devices
Alert limits for over and under current events
1.2-V compliant I
2
C, SMBus interface
Two device address options with four pin selectable address
SOT23-8 Package
Operating temperature: –40°C and +125°C