• Menu
  • Product
  • Email
  • PDF
  • Order now

  • 具有可编程阈值和主机唤醒功能的 ADS7142-Q1 汽车类双通道 12 位、140kSPS、I2C 兼容型 ADC

    • ZHCSJ06B November   2017  – September 2022 ADS7142-Q1

      PRODUCTION DATA  

  • CONTENTS
  • SEARCH
  • 具有可编程阈值和主机唤醒功能的 ADS7142-Q1 汽车类双通道 12 位、140kSPS、I2C 兼容型 ADC
  1. 1 特性
  2. 2 应用
  3. 3 说明
  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 术语表
    3. 9.3 Trademarks
    4. 9.4 接收文档更新通知
    5. 9.5 支持资源
  10. 10Mechanical, Packaging, and Orderable Information
  11. 重要声明
search No matches found.
  • Full reading width
    • Full reading width
    • Comfortable reading width
    • Expanded reading width
  • Card for each section
  • Card with all content

 

DATA SHEET

具有可编程阈值和主机唤醒功能的 ADS7142-Q1 汽车类双通道 12 位、140kSPS、I2C 兼容型 ADC

本资源的原文使用英文撰写。 为方便起见，TI 提供了译文；由于翻译过程中可能使用了自动化工具，TI 不保证译文的准确性。 为确认准确性，请务必访问 ti.com 参考最新的英文版本（控制文档）。

1 特性

  • 符合面向汽车应用的 AEC-Q100 标准：
    • 温度等级 1：–40°C 至 +125°C，TA
  • 提供功能安全型
    • 有助于进行功能安全系统设计的文档
  • 小封装尺寸：3mm × 2mm
  • 12 位无噪声分辨率
  • 采样率高达 140kSPS
  • 高效的主机休眠和唤醒：
    • 自主监控功耗为 900nW
    • 用于事件触发主机唤醒的窗口比较器
  • 独立的配置和校准：
    • 双通道、伪差分或接地感应输入配置
    • 用于校准的可编程阈值
    • 内部校准改善了失调电压和漂移
  • 错误触发防护：
    • 每个通道的可编程阈值
    • 用于实现抗噪性能的可编程迟滞
    • 用于瞬态抑制的事件计数器
  • I2C 接口：
    • 兼容 1.65V 至 3.6V 的电压范围
    • 8 个可配置地址
    • 高达 3.4MHz（高速）
  • 模拟电源：1.65V 至 3.6V

2 应用

通用的电压、电流和温度监测用于：

  • 数字驾驶舱处理单元
  • 驾驶员监控
  • 汽车音响主机
  • 不具有处理功能的汽车摄像头模块

3 说明

ADS7142-Q1 是 12 位 140kSPS 逐次逼近型寄存器 (SAR) 模数转换器 (ADC)，可以自主监测信号，同时更大限度地提高系统功率、可靠性和性能。该器件使用具有可编程高低警报阈值、迟滞和事件计数器的数字窗口比较器，实施每通道事件触发的中断。器件包含一个在 SAR ADC 前端的双通道模拟多路复用器，然后是一个用于转换和捕捉传感器数据的内部数据缓冲器。

ADS7142-Q1 提供 10 引脚 WSON 封装，可以实现功耗低至 900nW。该器件体积小巧，功耗低，非常适合空间受限型应用。

封装信息(1)
器件名称 封装 封装尺寸（标称值）
ADS7142-Q1 WSON (10) 3.00mm x 2.00mm
(1) 如需了解所有可用封装，请参阅数据表末尾的可订购产品附录。
方框图

4 Revision History

Changes from Revision A (October 2019) to Revision B (September 2022)

  • 更新了整个文档中的表格、图和交叉参考的编号格式 Go
  • 将提到 SPI 的旧术语的所有实例更改为控制器 和外设 Go
  • 向特性 部分添加了提供功能安全 要点Go
  • 添加了指向应用 部分的链接Go
  • 更改了说明 部分中的方框图 图像Go
  • Changed low-power oscillator to high-speed oscillator in test condition for analog supply current in Electrical Characteristics : Autonomous Modes sectionGo
  • Changed high-power oscillator to high-speed oscillator in test condition for digital supply current in Electrical Characteristics : Autonomous Modes sectionGo
  • digitalGo
  • Changed Functional Block Diagram figureGo
  • Added remote ground sense to single-ended configuration discussion of Single-Channel, Single-Ended Configuration With Remote Ground Sense sectionGo
  • Clarified normal device operation in Offset Calibration sectionGo
  • Deleted mode type from Transfer Characteristics tableGo
  • Changed discussion of BUSY/RDY going low in Reading Data From the Data Buffer sectionGo
  • Changed discussion of 12-bit wordsGo
  • Changed Digital Window Comparator section for clarityGo
  • Changed manual mode discussion in Device Functional Modes sectionGo
  • Deleted list of applications from Manual Mode sectionGo
  • Changed Autonomous Modes sectionGo
  • Changed Autonomous Mode With Threshold Monitoring and Diagnostics sectionGo
  • Deleted application discussion from Autonomous Mode With Burst Data sectionGo
  • Changed High-Precision Mode sectionGo
  • Changed QFN to WSON in Design Requirements of the Voltage and Temperature Monitoring in Remote Camera Modules Using the ADS7142-Q1 sectionGo

Changes from Revision * (November 2018) to Revision A (October 2019)

  • 将文档状态从预告信息更改为量产数据Go

5 Pin Configuration and Functions

Figure 5-1 DQC Package,10-Pin WSON(Top View)
Table 5-1 Pin Functions
PIN I/O DESCRIPTION
NO. NAME
1 GND Supply Ground for power supply, all analog and digital signals are referred to this pin.
2 AVDD Supply Analog supply input, also used as the reference voltage for analog-to-digital conversion.
3 AINP/AIN0 Analog input Single-channel operation: positive analog signal input.
Two-channel operation: analog signal input, channel 0.
4 AINM/AIN1 Analog input Single-channel operation: negative analog signal input.
Two-channel operation: analog signal input, channel 1.
5 ADDR Analog Input Input for selecting the I2C address of the device.
See the Section 7.3.6 section for details.
6 BUSY/ RDY Digital output The device pulls this pin high when scanning through channels in a sequence and brings this pin low when the sequence is completed or aborted.
7 ALERT Digital output Active low, open-drain output. The status of this pin is controlled by the digital window comparator block. Connect a pullup resistor from DVDD to this pin.
8 SDA Digital input/output Serial data input/output for the I2C interface. Connect a pullup resistor from DVDD to this pin.
9 SCL Digital input Serial clock for the I2C interface. Connect a pullup resistor from DVDD to this pin.
10 DVDD Supply Digital I/O supply voltage.

 
Texas Instruments

© Copyright 1995-2025 Texas Instruments Incorporated. All rights reserved.
Submit documentation feedback | IMPORTANT NOTICE | Trademarks | Privacy policy | Cookie policy | Terms of use | Terms of sale