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  • ADS131B04-Q1 汽车类、4 通道、32kSPS、同步采样、24 位、Δ-Σ ADC

    • ZHCSMK3B November   2020  – November 2021 ADS131B04-Q1

      PRODUCTION DATA  

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  • ADS131B04-Q1 汽车类、4 通道、32kSPS、同步采样、24 位、Δ-Σ 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
    6. 6.6 Timing Requirements
    7. 6.7 Switching Characteristics
    8. 6.8 Timing Diagrams
    9. 6.9 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Noise Measurements
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  Input ESD Protection Circuitry
      2. 8.3.2  Input Multiplexer
      3. 8.3.3  Programmable Gain Amplifier (PGA)
      4. 8.3.4  Voltage Reference
      5. 8.3.5  Internal Test Signals
      6. 8.3.6  Clocking
        1. 8.3.6.1 External Clock Using CLKIN Pin
        2. 8.3.6.2 Internal Oscillator
      7. 8.3.7  ΔΣ Modulator
      8. 8.3.8  Digital Filter
        1. 8.3.8.1 Digital Filter Implementation
          1. 8.3.8.1.1 Fast-Settling Filter
          2. 8.3.8.1.2 SINC3 and SINC3 + SINC1 Filter
        2. 8.3.8.2 Digital Filter Characteristic
      9. 8.3.9  Calibration Registers
      10. 8.3.10 Register Map CRC
    4. 8.4 Device Functional Modes
      1. 8.4.1 Power-Up and Reset
        1. 8.4.1.1 Power-On Reset
        2. 8.4.1.2 SYNC/RESET Pin
        3. 8.4.1.3 RESET Command
      2. 8.4.2 Fast Start-Up Behavior
      3. 8.4.3 Conversion Modes
        1. 8.4.3.1 Continuous-Conversion Mode
        2. 8.4.3.2 Global-Chop Mode
      4. 8.4.4 Power Modes
      5. 8.4.5 Standby Mode
      6. 8.4.6 Synchronization
    5. 8.5 Programming
      1. 8.5.1 Serial Interface
        1. 8.5.1.1  Chip Select (CS)
        2. 8.5.1.2  Serial Data Clock (SCLK)
        3. 8.5.1.3  Serial Data Input (DIN)
        4. 8.5.1.4  Serial Data Output (DOUT)
        5. 8.5.1.5  Data Ready (DRDY)
        6. 8.5.1.6  SPI Communication Frames
        7. 8.5.1.7  SPI Communication Words
        8. 8.5.1.8  Short SPI Frames
        9. 8.5.1.9  Communication Cyclic Redundancy Check (CRC)
        10. 8.5.1.10 SPI Timeout
      2. 8.5.2 ADC Conversion Data Format
      3. 8.5.3 Commands
        1. 8.5.3.1 NULL (0000 0000 0000 0000)
        2. 8.5.3.2 RESET (0000 0000 0001 0001)
        3. 8.5.3.3 STANDBY (0000 0000 0010 0010)
        4. 8.5.3.4 WAKEUP (0000 0000 0011 0011)
        5. 8.5.3.5 LOCK (0000 0101 0101 0101)
        6. 8.5.3.6 UNLOCK (0000 0110 0110 0110)
        7. 8.5.3.7 RREG (101a aaaa annn nnnn)
          1. 8.5.3.7.1 Reading a Single Register
          2. 8.5.3.7.2 Reading Multiple Registers
        8. 8.5.3.8 WREG (011a aaaa annn nnnn)
      4. 8.5.4 Collecting Data for the First Time or After a Pause in Data Collection
    6. 8.6 Register Map
  9. 9 Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Troubleshooting
      2. 9.1.2 Unused Inputs and Outputs
      3. 9.1.3 Antialias Filter
      4. 9.1.4 Minimum Interface Connections
      5. 9.1.5 Multiple Device Configuration
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Current Shunt Measurement
        2. 9.2.2.2 Battery Pack Voltage Measurement
        3. 9.2.2.3 Shunt Temperature Measurement
        4. 9.2.2.4 Auxiliary Analog Supply Voltage Measurement
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 CAP Pin Capacitor Requirement
    2. 10.2 Power-Supply Sequencing
    3. 10.3 Power-Supply Decoupling
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 支持资源
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 术语表
  13. 13Mechanical, Packaging, and Orderable Information
  14. 重要声明
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DATA SHEET

ADS131B04-Q1 汽车类、4 通道、32kSPS、同步采样、24 位、Δ-Σ 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
    • 可帮助进行功能安全系统设计的文档
  • 4 同步采样差分输入 ADC
  • 可编程数据速率:高达 32kSPS
  • 可编程增益: 高达 128
  • 噪声性能:
    • 1kSPS 时为 0.82µVRMS,增益 = 8
  • 使用全局斩波模式来去除随温度变化和时间推移而产生的温漂
  • 用于直接传感器连接的高阻抗模拟输入
  • 集成的负电荷泵允许输入信号测量低于地电平
  • 通道间串扰:-120dB
  • 低漂移内部基准:1.2V
  • 精密内部振荡器
  • 用于通信和寄存器映射的 CRC
  • 模拟和数字电源:2.7V 至 3.6V
  • 低功耗:3.3V AVDD 和 DVDD 下为 5mW
GUID-20210123-CA0I-327F-2FVK-VPZBHKSZNVZP-low.gif简化版方框图

2 应用

  • 汽车电池管理系统 (BMS):
    • 电流分流测量
    • 电压测量使用外部电阻分压器来实现
    • 温度测量使用热敏电阻或模拟输出温度传感器来实现
  • 电动汽车充电站:
    • 直流电子计量
  • 能量存储系统 (ESS)

3 说明

ADS131B04-Q1 是一款 four 通道、同步采样、24 位、Δ-Σ 模数转换器 (ADC),具有宽动态范围、低功耗和缓冲模拟输入,非常适合用于汽车电池管理系统 (BMS)。ADC 输入可以直接连接到分流电阻器以实现双向电池电流测量,连接到电阻分压器网络以实现高电压测量,或者连接到温度传感器(例如,热敏电阻或模拟输出温度传感器)。

单独 ADC 通道可以根据传感器输入进行独立配置。低噪声、可编程增益放大器 (PGA) 提供了从 1 到 128 的增益,以放大低电平信号。该器件采用全局斩波模式来去除随温度变化和时间推移而产生的温漂。此外,该器件集成了失调电压和增益校准寄存器,有助于消除信号链误差。

该器件集成了低漂移、1.2V 基准和高精度振荡器,减小了印刷电路板 (PCB) 面积。数据输入、数据输出和寄存器映射中可选的循环冗余校验 (CRC) 可以确保通信完整性。

完整的模拟前端 (AFE) 采用 20 引脚 TSSOP 封装,额定汽车级温度范围为 –40°C 至 +125°C。

器件信息(1)
器件型号 封装 封装尺寸(标称值)
ADS131B04-Q1 TSSOP (20) 6.50mm × 4.40mm
(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。

4 Revision History

Changes from January 6, 2021 to November 5, 2021 (from Revision A (January 2021) to Revision B (November 2021))

  • 将提到 SPI 的旧术语实例全局更改为控制器和外设Go
  • 向应用 部分添加了直流电子计量 和储能系统 (ESS) Go
  • Changed numbering of analog inputs in Description column of Pin Functions tableGo
  • Changed footnote in Absolute Maximum Ratings tableGo
  • Added offset error long-term drift, gain error long-term drift, and oscillator frequency long-term drift parameters to Electrical Characteristics tableGo
  • Added MIN and MAX specifications for internal oscillator frequency accuracy parameter to Electrical Characteristics tableGo
  • Added Gain Error Long-Term Drift and Oscillator Frequency Error vs Temperature graphs to Typical Characteristics sectionGo
  • Added information about the CRC seed value to the Register Map CRC sectionGo
  • Added SPI frame diagrams to SPI Communication Words sectionGo
  • Added information about CRC seed value and bits covered by the CRC within a frame to the Communication Cyclic Redundancy Check (CRC) sectionGo
  • Added SPI Timeout sectionGo
  • Changed bit field description for OSR[2:0] = 111b in the CLOCK registerGo
  • Added SYNC/RESET pin to ADS131B04-Q1 in a Typical Battery Management System Application figureGo

Changes from Revision * (November 2020) to Revision A (January 2021)

  • 将器件状态从“预告信息(预发布)”更改为“量产数据(正在供货)”Go

 

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