JAJSHX5F October   2010  – September 2019 ADS1118

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      K タイプの熱電対測定 内蔵温度センサによる冷接点補償
  4. 4 改訂履歴
  5. 5 概要（続き）
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
    1.     Pin Functions
  8. 8 Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Timing Requirements: Serial Interface
    7. 8.7 Switching Characteristics: Serial Interface
    8. 8.8 Typical Characteristics
  9. 9 Parameter Measurement Information
    1. 9.1 Noise Performance
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Multiplexer
      2. 10.3.2 Analog Inputs
      3. 10.3.3 Full-Scale Range (FSR) and LSB Size
      4. 10.3.4 Voltage Reference
      5. 10.3.5 Oscillator
      6. 10.3.6 Temperature Sensor
        1. 10.3.6.1 Converting from Temperature to Digital Codes
        2. 10.3.6.2 Converting from Digital Codes to Temperature
    4. 10.4 Device Functional Modes
      1. 10.4.1 Reset and Power Up
      2. 10.4.2 Operating Modes
        1. 10.4.2.1 Single-Shot Mode and Power-Down
        2. 10.4.2.2 Continuous-Conversion Mode
      3. 10.4.3 Duty Cycling for Low Power
    5. 10.5 Programming
      1. 10.5.1 Serial Interface
      2. 10.5.2 Chip Select (CS)
      3. 10.5.3 Serial Clock (SCLK)
      4. 10.5.4 Data Input (DIN)
      5. 10.5.5 Data Output and Data Ready (DOUT/DRDY)
      6. 10.5.6 Data Format
      7. 10.5.7 Data Retrieval
        1. 10.5.7.1 32-Bit Data Transmission Cycle
        2. 10.5.7.2 16-Bit Data Transmission Cycle
    6. 10.6 Register Maps
      1. 10.6.1 Conversion Register [reset = 0000h]
        1. Table 6. Conversion Register Field Descriptions
      2. 10.6.2 Config Register [reset = 058Bh]
        1. Table 7. Config Register Field Descriptions
  11. 11Application and Implementation
    1. 11.1 Application Information
      1. 11.1.1 Serial Interface Connections
      2. 11.1.2 GPIO Ports for Communication
      3. 11.1.3 Analog Input Filtering
      4. 11.1.4 Single-Ended Inputs
      5. 11.1.5 Connecting Multiple Devices
      6. 11.1.6 Pseudo Code Example
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
      2. 11.2.2 Detailed Design Procedure
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
    1. 12.1 Power-Supply Sequencing
    2. 12.2 Power-Supply Decoupling
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14デバイスおよびドキュメントのサポート
    1. 14.1 ドキュメントのサポート
      1. 14.1.1 関連資料
    2. 14.2 ドキュメントの更新通知を受け取る方法
    3. 14.3 コミュニティ・リソース
    4. 14.4 商標
    5. 14.5 静電気放電に関する注意事項
    6. 14.6 Glossary
  15. 15メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10.4.3 Duty Cycling for Low Power

The noise performance of a ΔΣ ADC generally improves when lowering the output data rate because more samples of the internal modulator can be averaged to yield one conversion result. In applications where power consumption is critical, the improved noise performance at low data rates may not be required. For these applications, the ADS1118 supports duty cycling that can yield significant power savings by periodically requesting high data rate readings at an effectively lower data rate. For example, an ADS1118 in power-down state with a data rate set to 860 SPS can be operated by a microcontroller that instructs a single-shot conversion every 125 ms (8 SPS). Because a conversion at 860 SPS only requires approximately 1.2 ms, the ADS1118 enters power-down state for the remaining 123.8 ms. In this configuration, the ADS1118 consumes approximately 1/100th the power that is otherwise consumed in continuous conversion mode. The duty cycling rate is completely arbitrary and is defined by the master controller. The ADS1118 offers lower data rates that do not implement duty cycling and also offers improved noise performance if required.