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ADS7142-Q1 Automotive, 2-Channel, 12-Bit, 140-kSPS, I2C-Compatible ADC With Programmable Threshold and Host Wake-Up Features
SBAS891B
November 2017 – September 2022
ADS7142-Q1
PRODUCTION DATA
CONTENTS
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ADS7142-Q1 Automotive, 2-Channel, 12-Bit, 140-kSPS, I2C-Compatible ADC With Programmable Threshold and Host Wake-Up Features
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: All Modes
6.6
Electrical Characteristics: Manual Mode
6.7
Electrical Characteristics: Autonomous Modes
6.8
Electrical Characteristics: High Precision Mode
6.9
Timing Requirements
6.10
Switching Characteristics
6.11
Timing Diagrams
6.12
Typical Characteristics: All Modes
6.13
Typical Characteristics: Manual Mode
6.14
Typical Characteristics: Autonomous Modes
6.15
Typical Characteristics: High-Precision Mode
7
Detailed Description
7.1
Overview
7.2
Functional Block Diagram
7.3
Feature Description
7.3.1
Analog Input and Multiplexer
7.3.1.1
Two-Channel, Single-Ended Configuration
7.3.1.2
Single-Channel, Single-Ended Configuration With Remote Ground Sense
7.3.1.3
Single-Channel, Pseudo-Differential Configuration
7.3.2
Offset Calibration
7.3.3
Reference
7.3.4
ADC Transfer Function
7.3.5
Oscillator and Timing Control
7.3.6
I2C Address Selector
7.3.7
Data Buffer
7.3.7.1
Filling of the Data Buffer
7.3.7.2
Reading Data From the Data Buffer
7.3.8
Accumulator
7.3.9
Digital Window Comparator
7.3.10
I2C Protocol Features
7.3.10.1
General Call
7.3.10.2
General Call With Software Reset
7.3.10.3
General Call With Write Software Programmable Part of the Target Address
7.3.10.4
Configuring the ADC Into High-Speed I2C Mode
7.3.10.5
Bus Clear
7.4
Device Functional Modes
7.4.1
Device Power Up and Reset
7.4.2
Manual Mode
7.4.2.1
Manual Mode With CH0 Only
7.4.2.2
Manual Mode With AUTO Sequence
7.4.3
Autonomous Modes
7.4.3.1
Autonomous Mode With Threshold Monitoring and Diagnostics
7.4.3.1.1
Autonomous Mode With Pre-ALERT Data
7.4.3.1.2
Autonomous Mode With Post-ALERT Data
7.4.3.2
Autonomous Mode With Burst Data
7.4.3.2.1
Autonomous Mode With Start Burst
7.4.3.2.2
Autonomous Mode With Stop Burst
7.4.4
High-Precision Mode
7.5
Programming
7.5.1
Reading Registers
7.5.1.1
Single Register Read
7.5.1.2
Reading a Continuous Block of Registers
7.5.2
Writing Registers
7.5.2.1
Single Register Write
7.5.2.2
Writing a Continuous Block of Registers
7.5.2.3
Set Bit
7.5.2.4
Clear Bit
7.6
Register Map
7.6.1
Page1 Registers
8
Application and Implementation
8.1
Application Information
8.2
Typical Applications
8.2.1
ADS7142-Q1 as a Programmable Comparator With False Trigger Prevention and Diagnostics
8.2.1.1
Design Requirements
8.2.1.2
Detailed Design Procedure
8.2.1.2.1
Programmable Thresholds and Hysteresis
8.2.1.2.2
False Trigger Prevention With an Event Counter
8.2.1.2.3
Fault Diagnostics With the Data Buffer
8.2.1.3
Application Curves
8.2.2
Voltage and Temperature Monitoring in Remote Camera Modules Using the ADS7142-Q1
8.2.2.1
Design Requirements
8.3
Power Supply Recommendations
8.3.1
AVDD and DVDD Supply Recommendations
8.4
Layout
8.4.1
Layout Guidelines
8.4.2
Layout Example
9
Device and Documentation Support
9.1
Electrostatic Discharge Caution
9.2
Glossary
9.3
Trademarks
9.4
Receiving Notification of Documentation Updates
9.5
Support Resources
10
Mechanical, Packaging, and Orderable Information
IMPORTANT NOTICE
Package Options
Mechanical Data (Package|Pins)
DQC|10
MPSS005A
Thermal pad, mechanical data (Package|Pins)
DQC|10
QFND196E
Orderable Information
sbas891b_oa
sbas891b_pm
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