ZHCSCL7C May   2014  – April 2021 AFE4403

PRODUCTION DATA  

  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Device Family Options
  6. Pin Configuration and Functions
  7. Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Timing Requirements: Supply Ramp and Power-Down
    8. 7.8 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Receiver Channel
        1. 8.3.1.1 Receiver Front-End
        2. 8.3.1.2 Ambient Cancellation Scheme and Second Stage Gain Block
        3. 8.3.1.3 Receiver Control Signals
        4. 8.3.1.4 Receiver Timing
      2. 8.3.2 Clocking and Timing Signal Generation
      3. 8.3.3 Timer Module
        1. 8.3.3.1 Using the Timer Module
      4. 8.3.4 Receiver Subsystem Power Path
      5. 8.3.5 Transmit Section
        1. 8.3.5.1 Third LED Support
        2. 8.3.5.2 Transmitter Power Path
        3. 8.3.5.3 LED Power Reduction During Periods of Inactivity
        4. 8.3.5.4 LED Configurations
    4. 8.4 Device Functional Modes
      1. 8.4.1 ADC Operation and Averaging Module
        1. 8.4.1.1 Operation Without Averaging
        2. 8.4.1.2 Operation With Averaging
        3. 8.4.1.3 Dynamic Power-Down Mode
      2. 8.4.2 Diagnostics
        1. 8.4.2.1 Photodiode-Side Fault Detection
        2. 8.4.2.2 Transmitter-Side Fault Detection
        3. 8.4.2.3 Diagnostics Module
    5. 8.5 Programming
      1. 8.5.1 Serial Programming Interface
      2. 8.5.2 Reading and Writing Data
        1. 8.5.2.1 Writing Data
        2. 8.5.2.2 Reading Data
        3. 8.5.2.3 Multiple Data Reads and Writes
        4. 8.5.2.4 Register Initialization
        5. 8.5.2.5 AFE SPI Interface Design Considerations
    6. 8.6 Register Maps
      1. 8.6.1 AFE Register Map
      2. 8.6.2 AFE Register Description
  9. Application Information Disclaimer
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
    1. 10.1 Power Consumption Considerations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Trademarks
    2. 12.2 静电放电警告
    3. 12.3 术语表
  13. 13Mechanical, Packaging, and Orderable Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

特性

  • 用于脉搏血氧仪和心率监测应用的完全集成式 AFE:
  • 发送:
    • 集成双路 LED 驱动器
      (H 桥或共阳极)
    • 可支持 3 个 LED,适用于优化型 SPO2、HRM 或多波长 HRM
    • 高达 110dB 的动态范围
    • LED 电流:
      • 可编程为 100mA 电流,具有 8 位电流分辨率
    • 30µA + 平均 LED 电流
    • 可编程 LED 接通时间
    • 独立的 LED2 和 LED1 电流基准
  • 具有高动态范围的接收通道:
    • 22 位补码格式输出
    • 高达 105dB 的动态范围
    • 低功耗:< 650µA
    • 动态断电模式,以将电流减少至 300µA
    • 可适应极宽范围的信号振幅:
      • 可编程总增益:10kΩ 至 4MΩ
    • 集成数字环境估算和删减功能
  • 通过外部时钟或晶振实现灵活的时钟:
    • 脉冲频率:62.5SPS 至 2000SPS
    • 灵活的脉冲时序和定时控制
    • 输入时钟范围:4MHz(最小值)至 60MHz(最大值)
  • 集成式故障诊断:
    • 光电二极管和 LED 开路与
      短路检测
  • 电源:
    • Rx = 2.0V 至 3.6V
    • Tx = 3.0V 至 5.25V
  • 封装:紧凑型 DSBGA-36
    (3.07mm × 3.07mm × 0.5mm)
  • 额定温度范围:0°C–20°C 至 70°C