ZHCSGS4 August 2017 ADS114S06B , ADS114S08B

PRODUCTION DATA. 

  1. 特性
  2. 应用
  3. 说明
  4. 修订历史记录
  5. Device Family Comparison Table
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1Absolute Maximum Ratings
    2. 7.2ESD Ratings
    3. 7.3Recommended Operating Conditions
    4. 7.4Thermal Information
    5. 7.5Electrical Characteristics
    6. 7.6Timing Characteristics
    7. 7.7Switching Characteristics
    8. 7.8Typical Characteristics
  8. Parameter Measurement Information
    1. 8.1Noise Performance
  9. Detailed Description
    1. 9.1Overview
    2. 9.2Functional Block Diagram
    3. 9.3Feature Description
      1. 9.3.1 Multiplexer
      2. 9.3.2 Low-Noise Programmable Gain Amplifier
        1. 9.3.2.1PGA Input-Voltage Requirements
        2. 9.3.2.2Bypassing the PGA
      3. 9.3.3 Voltage Reference
        1. 9.3.3.1Internal Reference
        2. 9.3.3.2External Reference
        3. 9.3.3.3Reference Buffers
      4. 9.3.4 Clock Source
      5. 9.3.5 Delta-Sigma Modulator
      6. 9.3.6 Digital Filter
        1. 9.3.6.1Digital Filter Frequency Response
        2. 9.3.6.2Data Conversion Time
        3. 9.3.6.3Note on Conversion Time
        4. 9.3.6.450-Hz and 60-Hz Line Cycle Rejection
      7. 9.3.7 Excitation Current Sources (IDACs)
      8. 9.3.8 Bias Voltage Generation
      9. 9.3.9 System Monitor
        1. 9.3.9.1Internal Temperature Sensor
        2. 9.3.9.2Power Supply Monitors
        3. 9.3.9.3Burn-Out Current Sources
      10. 9.3.10Status Register
        1. 9.3.10.1POR Flag
        2. 9.3.10.2RDY Flag
      11. 9.3.11General-Purpose Inputs and Outputs (GPIOs)
      12. 9.3.12Calibration
        1. 9.3.12.1Offset Calibration
        2. 9.3.12.2Gain Calibration
    4. 9.4Device Functional Modes
      1. 9.4.1Reset
        1. 9.4.1.1Power-On Reset
        2. 9.4.1.2RESET Pin
        3. 9.4.1.3Reset by Command
      2. 9.4.2Power-Down Mode
      3. 9.4.3Standby Mode
      4. 9.4.4Conversion Modes
        1. 9.4.4.1Continuous Conversion Mode
        2. 9.4.4.2Single-Shot Conversion Mode
    5. 9.5Programming
      1. 9.5.1Serial Interface
        1. 9.5.1.1Chip Select (CS)
        2. 9.5.1.2Serial Clock (SCLK)
        3. 9.5.1.3Serial Data Input (DIN)
        4. 9.5.1.4Serial Data Output and Data Ready (DOUT/DRDY)
        5. 9.5.1.5Data Ready (DRDY)
        6. 9.5.1.6Timeout
      2. 9.5.2Data Format
      3. 9.5.3Commands
        1. 9.5.3.1 NOP
        2. 9.5.3.2 WAKEUP
        3. 9.5.3.3 POWERDOWN
        4. 9.5.3.4 RESET
        5. 9.5.3.5 START
        6. 9.5.3.6 STOP
        7. 9.5.3.7 SYOCAL
        8. 9.5.3.8 SYGCAL
        9. 9.5.3.9 SFOCAL
        10. 9.5.3.10RDATA
        11. 9.5.3.11RREG
        12. 9.5.3.12WREG
      4. 9.5.4Interfacing with Multiple Devices
    6. 9.6Register Map
      1. 9.6.1Configuration Registers
      2. 9.6.2Register Descriptions
        1. 9.6.2.1 Device ID Register (address = 00h) [reset = xxh]
        2. 9.6.2.2 Device Status Register (address = 01h) [reset = 80h]
        3. 9.6.2.3 Input Multiplexer Register (address = 02h) [reset = 01h]
        4. 9.6.2.4 Gain Setting Register (address = 03h) [reset = 00h]
        5. 9.6.2.5 Data Rate Register (address = 04h) [reset = 14h]
        6. 9.6.2.6 Reference Control Register (address = 05h) [reset = 10h]
        7. 9.6.2.7 Excitation Current Register 1 (address = 06h) [reset = 00h]
        8. 9.6.2.8 Excitation Current Register 2 (address = 07h) [reset = FFh]
        9. 9.6.2.9 Sensor Biasing Register (address = 08h) [reset = 00h]
        10. 9.6.2.10System Control Register (address = 09h) [reset = 10h]
        11. 9.6.2.11Reserved Register (address = 0Ah) [reset = 00h]
        12. 9.6.2.12Offset Calibration Register 1 (address = 0Bh) [reset = 00h]
        13. 9.6.2.13Offset Calibration Register 2 (address = 0Ch) [reset = 00h]
        14. 9.6.2.14Reserved Register (address = 0Dh) [reset = 00h]
        15. 9.6.2.15Gain Calibration Register 1 (address = 0Eh) [reset = 00h]
        16. 9.6.2.16Gain Calibration Register 2 (address = 0Fh) [reset = 40h]
        17. 9.6.2.17GPIO Data Register (address = 10h) [reset = 00h]
        18. 9.6.2.18GPIO Configuration Register (address = 11h) [reset = 00h]
  10. 10Application and Implementation
    1. 10.1Application Information
      1. 10.1.1Serial Interface Connections
      2. 10.1.2Analog Input Filtering
      3. 10.1.3External Reference and Ratiometric Measurements
      4. 10.1.4Establishing a Proper Input Voltage
      5. 10.1.5Unused Inputs and Outputs
      6. 10.1.6Pseudo Code Example
    2. 10.2Typical Application
      1. 10.2.1Design Requirements
      2. 10.2.2Detailed Design Procedure
        1. 10.2.2.1Register Settings
      3. 10.2.3Application Curves
    3. 10.3Do's and Don'ts
  11. 11Power Supply Recommendations
    1. 11.1Power Supplies
    2. 11.2Power-Supply Sequencing
    3. 11.3Power-On Reset
    4. 11.4Power-Supply Decoupling
  12. 12Layout
    1. 12.1Layout Guidelines
    2. 12.2Layout Example
  13. 13器件和文档支持
    1. 13.1器件支持
      1. 13.1.1开发支持
    2. 13.2文档支持
      1. 13.2.1相关文档
    3. 13.3相关链接
    4. 13.4接收文档更新通知
    5. 13.5社区资源
    6. 13.6商标
    7. 13.7静电放电警告
    8. 13.8Glossary
  14. 14机械、封装和可订购信息

特性

  • 低功耗:低至 280µA
  • 可编程增益:1 至 128
  • 可编程数据传输速率:2.5SPS 至 4kSPS
  • 采用低延迟数字滤波器,
    在 ≤ 20SPS 时实现同步 50Hz 和 60Hz 抑制
  • 具有 12 路 (ADS114S08B) 或 6 路 (ADS114S06B) 独立可选输入的模拟多路复用器
  • 两个匹配且可编程的传感器激励电流源:10μA 至 2000µA
  • 内部基准:2.5V,8ppm/°C(典型值)漂移
  • 内部振荡器:4.096MHz,精度为 2%
  • 内部温度传感器
  • 自偏移校准与系统校准
  • 4 个通用 I/O
  • SPI 兼容型接口
  • 模拟电源:单极(2.7V 到 5.25V)或双极 (±2.5V)
  • 数字电源:2.7V 到 3.6V
  • 工作温度:–40°C 至 +125°C
  • ADS114S0x 之间具有引脚兼容性

应用

  • 传感器和变送器:
    温度、压力、应力,流量
  • 可编程逻辑控制器 (PLC) 和分布式控制系统 (DCS) 模拟输入模块
  • 温度控制器
  • 人工气候室,工业烘箱

说明

ADS114S06B 和 ADS114S08B 均为高精度 16 位 Δ-Σ 模数转换器 (ADC),兼具低功耗特性与多种集成 特性, 能够降低系统成本并减少小型传感器信号测量 应用 中的组件数。

这些 ADC 均配有数字滤波器,能够在嘈杂的工业环境中提供低延迟转换结果和 50Hz 或 60Hz 噪声抑制。可编程增益放大器 (PGA) 具备低噪声特性,并且可提供 1 到 128 的增益,能够为电阻桥或热电偶应用放大低幅值 信号的关键组成部分。此外,这两款器件还集成有一个低漂移 2.5V 电压基准,减小了印刷电路板 (PCB) 面积。最后还有两个可编程的激励电流源 (IDAC),便于提供准确的电阻式温度检测器 (RTD) 偏置。

输入多路复用器支持适用于 ADS114S08B 的 12 路输入和适用于 ADS114S06B 的 6 路输入。这些输入能够以任意组合形式连接到 ADC,从而提高设计灵活性。此外,这两款器件还 包含 传感器烧毁检测、热电偶电压偏置和系统监视等功能以及四个通用 I/O。

这两款器件采用超薄四方扁平无引线 (VQFN)-32 或薄型四方扁平 (TQFP)-32 封装。

器件信息

订货编号封装(引脚)封装尺寸
ADS114S0xBTQFP (32)5.0mm × 5.0mm
VQFN (32)5.0mm × 5.0mm

功能框图

ADS114S06B ADS114S08B ai_fbd_sbas852.gif