SBAS891B November   2017  – September 2022 ADS7142-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: All Modes
    6. 6.6  Electrical Characteristics: Manual Mode
    7. 6.7  Electrical Characteristics: Autonomous Modes
    8. 6.8  Electrical Characteristics: High Precision Mode
    9. 6.9  Timing Requirements
    10. 6.10 Switching Characteristics
    11. 6.11 Timing Diagrams
    12. 6.12 Typical Characteristics: All Modes
    13. 6.13 Typical Characteristics: Manual Mode
    14. 6.14 Typical Characteristics: Autonomous Modes
    15. 6.15 Typical Characteristics: High-Precision Mode
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Analog Input and Multiplexer
        1. 7.3.1.1 Two-Channel, Single-Ended Configuration
        2. 7.3.1.2 Single-Channel, Single-Ended Configuration With Remote Ground Sense
        3. 7.3.1.3 Single-Channel, Pseudo-Differential Configuration
      2. 7.3.2  Offset Calibration
      3. 7.3.3  Reference
      4. 7.3.4  ADC Transfer Function
      5. 7.3.5  Oscillator and Timing Control
      6. 7.3.6  I2C Address Selector
      7. 7.3.7  Data Buffer
        1. 7.3.7.1 Filling of the Data Buffer
        2. 7.3.7.2 Reading Data From the Data Buffer
      8. 7.3.8  Accumulator
      9. 7.3.9  Digital Window Comparator
      10. 7.3.10 I2C Protocol Features
        1. 7.3.10.1 General Call
        2. 7.3.10.2 General Call With Software Reset
        3. 7.3.10.3 General Call With Write Software Programmable Part of the Target Address
        4. 7.3.10.4 Configuring the ADC Into High-Speed I2C Mode
        5. 7.3.10.5 Bus Clear
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device Power Up and Reset
      2. 7.4.2 Manual Mode
        1. 7.4.2.1 Manual Mode With CH0 Only
        2. 7.4.2.2 Manual Mode With AUTO Sequence
      3. 7.4.3 Autonomous Modes
        1. 7.4.3.1 Autonomous Mode With Threshold Monitoring and Diagnostics
          1. 7.4.3.1.1 Autonomous Mode With Pre-ALERT Data
          2. 7.4.3.1.2 Autonomous Mode With Post-ALERT Data
        2. 7.4.3.2 Autonomous Mode With Burst Data
          1. 7.4.3.2.1 Autonomous Mode With Start Burst
          2. 7.4.3.2.2 Autonomous Mode With Stop Burst
      4. 7.4.4 High-Precision Mode
    5. 7.5 Programming
      1. 7.5.1 Reading Registers
        1. 7.5.1.1 Single Register Read
        2. 7.5.1.2 Reading a Continuous Block of Registers
      2. 7.5.2 Writing Registers
        1. 7.5.2.1 Single Register Write
        2. 7.5.2.2 Writing a Continuous Block of Registers
        3. 7.5.2.3 Set Bit
        4. 7.5.2.4 Clear Bit
    6. 7.6 Register Map
      1. 7.6.1 Page1 Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 ADS7142-Q1 as a Programmable Comparator With False Trigger Prevention and Diagnostics
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Programmable Thresholds and Hysteresis
          2. 8.2.1.2.2 False Trigger Prevention With an Event Counter
          3. 8.2.1.2.3 Fault Diagnostics With the Data Buffer
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Voltage and Temperature Monitoring in Remote Camera Modules Using the ADS7142-Q1
        1. 8.2.2.1 Design Requirements
    3. 8.3 Power Supply Recommendations
      1. 8.3.1 AVDD and DVDD Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  9. 9 Device and Documentation Support
    1. 9.1 Electrostatic Discharge Caution
    2. 9.2 Glossary
    3. 9.3 Trademarks
    4. 9.4 Receiving Notification of Documentation Updates
    5. 9.5 Support Resources
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics: All Modes

at TA = -40°C to 125°C, AVDD = 3 V, DVDD = 1.65 V to 3.6 V, All Channel Configurations (unless otherwise noted)(1)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
ANALOG INPUT (Two-Channel Single-Ended Configuration)
Full-scale input voltage span(1) AINP/AIN0 to GND or AINM/AIN1 to GND 0 AVDD V
Absolute input voltage range AINP/AIN0 to GND or AINM/AIN1 to GND –0.1 AVDD + 0.1 V
ANALOG INPUT (Single-Channel Single-Ended Configuration with Remote Ground Sense)
Full-scale input voltage span(1) AINP/AIN0 to AINM/AIN1  0 AVDD V
Absolute input voltage range AINP/AIN0 to GND –0.1 AVDD + 0.1 V
AINM/AIN1 to GND –0.1 0.1
ANALOG INPUT (Single-Channel Pseudo-Differential Configuration with Remote Ground Sense)
Full-scale input voltage span(1) AINP/AIN0 to AINM/AIN1  –AVDD/2 AVDD/2 V
Absolute input voltage range AINP/AIN0 to GND –0.1 AVDD + 0.1 V
AINM/AIN1 to GND AVDD/2 – 0.1 AVDD/2 + 0.1
INTERNAL OSCILLATOR
tHSO Time period for high-speed oscillator 50 110 ns
tLPO Time period for low-power oscillator 95.2 300 µs
DIGITAL INPUT/OUTPUT (SCL, SDA)
VIH High-level input voltage 0.7 × DVDD DVDD V
VIL Low-level input voltage 0 0.3 × DVDD V
VOL Low-level output voltage With 3 mA sink current and DVDD > 2 V 0 0.4 V
With 3 mA sink current and 1.65 V < DVDD < 2 V 0 0.2 × DVDD
IOL Low-level output current (sink) VOL = 0.4 V for standard and fast mode (100, 400 kHz) 3 mA
VOL = 0.6 V for  fast mode (400 kHz) 6
VOL = 0.4 V fast mode Plus (1 MHz) 20
IOL Low-level output current (sink) VOL= 0.4 V high speed (1.7 MHz, 3.4 MHz) 25 mA
II Input current on pin 10 µA
CI Input capacitance on pin 10 pF
DIGITAL OUTPUT (BUSY/RDY)
VOH High-level output voltage Isource = 200 µA 0.8 × DVDD DVDD V
Isource = 2 mA 0.7 × DVDD DVDD
VOL Low-level output voltage Isink = 200 µA 0 0.2 × DVDD V
Isink = 2 mA 0 0.3 × DVDD
DIGITAL OUTPUT (ALERT)
IOL Low-level output current VOL < 0.25 V 5 mA
VOL Low-level output voltage Isink = 5 mA 0 0.25 V
POWER-SUPPLY REQUIREMENTS
AVDD Analog supply voltage 1.65 3.6 V
DVDD Digital I/O supply voltage 1.65 3.6 V
(1) Ideal Input span, does not include gain or offset error.