SBOS776C
March 2016 – March 2021
INA3221-Q1
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison Table
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagram
8.3
Feature Description
8.3.1
Basic ADC Functions
8.3.2
Alert Monitoring
8.3.2.1
Critical Alert
8.3.2.1.1
Summation Control Function
8.3.2.2
Warning Alert
8.3.2.3
Power-Valid Alert
8.3.2.4
Timing-Control Alert
8.3.2.5
Default Settings
8.3.3
Software Reset
8.4
Device Functional Modes
8.4.1
Averaging Function
8.4.2
Multiple Channel Monitoring
8.4.2.1
Channel Configuration
8.4.2.2
Averaging and Conversion-Time Considerations
8.4.3
Filtering and Input Considerations
8.5
Programming
8.5.1
Bus Overview
8.5.1.1
Serial Bus Address
8.5.1.2
Serial Interface
8.5.2
Writing To and Reading From the INA3221-Q1
8.5.2.1
High-Speed I2C Mode
8.5.3
SMBus Alert Response
8.6
Register Maps
8.6.1
Summary of Register Set
8.6.2
Register Descriptions
8.6.2.1
Configuration Register (address = 00h) [reset = 7127h]
8.6.2.2
Channel-1 Shunt-Voltage Register (address = 01h), [reset = 00h]
8.6.2.3
Channel-1 Bus-Voltage Register (address = 02h) [reset = 00h]
8.6.2.4
Channel-2 Shunt-Voltage Register (address = 03h) [reset = 00h]
8.6.2.5
Channel-2 Bus-Voltage Register (address = 04h) [reset = 00h]
8.6.2.6
Channel-3 Shunt-Voltage Register (address = 05h) [reset = 00h]
8.6.2.7
Channel-3 Bus-Voltage Register (address = 06h) [reset = 00h]
8.6.2.8
Channel-1 Critical-Alert Limit Register (address = 07h) [reset = 7FF8h]
8.6.2.9
Warning-Alert Channel-1 Limit Register (address = 08h) [reset = 7FF8h]
8.6.2.10
Channel-2 Critical-Alert Limit Register (address = 09h) [reset = 7FF8h]
8.6.2.11
Channel-2 Warning-Alert Limit Register (address = 0Ah) [reset = 7FF8h]
8.6.2.12
Channel-3 Critical-Alert Limit Register (address = 0Bh) [reset = 7FF8h]
8.6.2.13
Channel-3 Warning-Alert Limit Register (address = 0Ch) [reset = 7FF8h]
8.6.2.14
Shunt-Voltage Sum Register (address = 0Dh) [reset = 00h]
8.6.2.15
Shunt-Voltage Sum-Limit Register (address = 0Eh) [reset = 7FFEh]
8.6.2.16
Mask/Enable Register (address = 0Fh) [reset = 0002h]
8.6.2.17
Power-Valid Upper-Limit Register (address = 10h) [reset = 2710h]
8.6.2.18
Power-Valid Lower-Limit Register (address = 11h) [reset = 2328h]
8.6.2.19
Manufacturer ID Register (address = FEh) [reset = 5449h]
8.6.2.20
Die ID Register (address = FFh) [reset = 3220]
9
Application and Implementation
9.1
Application Information
9.2
Typical Application
9.2.1
Design Requirements
9.2.2
Detailed Design Procedure
9.2.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Device Support
12.1.1
Development Support
12.2
Documentation Support
12.2.1
Related Documentation
12.3
Receiving Notification of Documentation Updates
12.4
Support Resources
12.5
Trademarks
12.6
Electrostatic Discharge Caution
12.7
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
RGV|16
MPQF121F
Thermal pad, mechanical data (Package|Pins)
Orderable Information
sbos776c_oa
sbos776c_pm
1
Features
Qualified for automotive applications
AEC-Q100 qualified with the following results:
Device temperature grade 1: –40 °C to 125 °C
Functional Safety-Capable
Documentation available to aid functional safety system design
Senses bus voltages from 0 V to 26 V
Reports shunt and bus voltage
High accuracy:
Offset voltage: ±80 µV (maximum)
Gain error: 0.25% (maximum)
Configurable averaging options
Four programmable addresses
Programmable alert and warning outputs
Power-supply operation: 2.7 V to 5.5 V
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