ZHCSH77C June   2017  – December 2018 DAC8740H , DAC8741H

PRODUCTION DATA.  

  1. 特性
  2. 应用
  3. 说明
    1.     Device Images
      1.      简化原理图
  4. 修订历史记录
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     DAC8740H Pin Functions
    2.     DAC8741H Pin 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 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1  HART Modulator
      2. 8.3.2  HART Demodulator
      3. 8.3.3  FOUNDATION FIELDBUS / PROFIBUS PA Manchester Encoder
      4. 8.3.4  FOUNDATION FIELDBUS / PROFIBUS PA Manchester Decoder
      5. 8.3.5  Internal Reference
      6. 8.3.6  Clock Configuration
      7. 8.3.7  Reset and Power-Down
      8. 8.3.8  Full-Duplex Mode
      9. 8.3.9  I/O Selection
      10. 8.3.10 Jabber Inhibitor
    4. 8.4 Device Functional Modes
      1. 8.4.1 UART Interfaced HART
      2. 8.4.2 UART Interfaced FOUNDATION FIELDBUS / PROFIBUS PA
      3. 8.4.3 SPI Interfaced HART
      4. 8.4.4 SPI Interfaced FOUNDATION FIELDBUS / PROFIBUS PA
      5. 8.4.5 Interface
        1. 8.4.5.1 UART
          1. 8.4.5.1.1 UART Carrier Detect
        2. 8.4.5.2 SPI
          1. 8.4.5.2.1 SPI Cyclic Redundancy Check
          2. 8.4.5.2.2 SPI Interrupt Request
    5. 8.5 Register Maps
      1. 8.5.1 CONTROL Register (Offset = 2h) [reset = 0x8042]
        1. Table 4. CONTROL Register Field Descriptions
      2. 8.5.2 RESET Register (Offset = 7h) [reset = 0x0000]
        1. Table 5. RESET Register Field Descriptions
      3. 8.5.3 MODEM_STATUS Register (Offset = 20h) [reset = 0x0000]
        1. Table 6. MODEM_STATUS Register Field Descriptions
      4. 8.5.4 MODEM_IRQ_MASK Register (Offset = 21h) [reset = 0x0024]
        1. Table 7. MODEM_IRQ_MASK Register Field Descriptions
      5. 8.5.5 MODEM_CONTROL Register (Offset = 22h) [reset = 0x0048]
        1. Table 8. MODEM_CONTROL Register Field Descriptions
      6. 8.5.6 FIFO_D2M Register (Offset = 23h) [reset = 0x0200]
        1. Table 9. FIFO_D2M Register Field Descriptions
      7. 8.5.7 FIFO_M2D Register (Offset = 24h) [reset = 0x0200]
        1. Table 10. FIFO_M2D Register Field Descriptions
      8. 8.5.8 FIFO_LEVEL_SET Register (Offset = 25h) [reset = 0x0000]
        1. Table 11. FIFO_LEVEL_SET Register Field Descriptions
      9. 8.5.9 PAFF_JABBER Register (Offset = 27h) [reset = 0x0000]
        1. Table 12. PAFF_JABBER Register Field Descriptions
  9. Application and Implementation
    1. 9.1 Application Information
      1. 9.1.1 Design Recommendations
      2. 9.1.2 Selecting the Crystal/Resonator
      3. 9.1.3 Included Functions and Filter Selection
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 DAC8740H HART Modem
        2. 9.2.2.2 2-Wire Current Loop
        3. 9.2.2.3 Regulator
        4. 9.2.2.4 DAC
        5. 9.2.2.5 Amplifiers
        6. 9.2.2.6 Diodes
        7. 9.2.2.7 Passives
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12器件和文档支持
    1. 12.1 文档支持
      1. 12.1.1 相关文档
    2. 12.2 相关链接
    3. 12.3 接收文档更新通知
    4. 12.4 社区资源
    5. 12.5 商标
    6. 12.6 静电放电警告
    7. 12.7 术语表
  13. 13机械、封装和可订购信息

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RGE|24
订购信息

特性

  • 兼容 HART 的物理层调制解调器
    • 1200/2200Hz HART FSK 正弦波
    • 对 TX 信号振幅的寄存器编程控制
      (仅适用于 DAC8741H)
    • 集成式 RX 解调器和带通滤波器,具有极少的外部组件
  • 兼容 FOUNDATION 现场总线的 H1 控制器和介质连接单元 (MAU)
    • 基于曼彻斯特编码总线供电 (MBP) 的 31.25 kbit/s 通信
    • 集成曼彻斯特编码器和解码器
    • 与 PROFIBUS PA 兼容
  • 低静态电流:最大值 180uA,典型工业工作温度范围(-40°C 至 85°C)
  • 集成 1.5V 电压基准
  • 灵活的时钟选项
    • 内部振荡器
    • 外部晶体振荡器
    • 外部 CMOS 时钟
  • 数字接口
    • DAC8740H:UART
    • DAC8741H:SPI
  • 可靠性:CRC 位错校验、看门狗计时器(仅适用于 DAC8741H)
  • 宽工作温度范围:-55°C 至 125°C
  • 4mm x 4mm QFN 封装
  • DAC8740H DAC8741H HART_CP_Logo.gif