ZHCSDF1 February   2015 UCD90240

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  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 Nonvolatile Memory Characteristics
    7. 6.7 I2C/PMBUS Timing Requirements
  7. 7 Detailed Description
    1. 7.1 Device Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  TI Fusion GUI
      2. 7.3.2  PMBUS Interface
      3. 7.3.3  Rail Setup
      4. 7.3.4  Rail Monitoring Configuration
      5. 7.3.5  GPI Configuration
      6. 7.3.6  Rail Sequence Configuration
      7. 7.3.7  Fault Responses Configuration
      8. 7.3.8  GPO Configuration
        1. 7.3.8.1 Command Controlled GPO
        2. 7.3.8.2 Logic GPO
      9. 7.3.9  Margining Configuration
      10. 7.3.10 Pin Selected Rail States Configuration
      11. 7.3.11 Watchdog Timer
      12. 7.3.12 System Reset Function
      13. 7.3.13 Cascading Multiple Devices
      14. 7.3.14 Voltage Monitoring
      15. 7.3.15 Status Monitoring
      16. 7.3.16 Data and Error Logging to EEPROM Memory
      17. 7.3.17 Black Box First Fault Logging
      18. 7.3.18 PMBUS Address Selection
      19. 7.3.19 ADC Reference
      20. 7.3.20 Device Reset
      21. 7.3.21 Brownout
      22. 7.3.22 Device Configuration and Programming
      23. 7.3.23 Internal Fault Management
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application Diagram
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11器件和文档支持
    1. 11.1 商标
    2. 11.2 静电放电警告
    3. 11.3 术语表
  12. 12机械封装和可订购信息

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

9 Power Supply Recommendations

UCD90240 should be powered by a 3.3-V power supply.

If internal reference is used, V33A is used as ADC reference and is assumed to be exactly 3.3 V. Any input voltage deviation from 3.3 V will introduce an error to ADC reference and thus ADC results. Therefore, the 3.3-V power supply must be tightly regulated and with very small voltage fluctuation (including voltage ripple and voltage deviation caused by load transients).

If external reference is used, the 3.3-V power supply only needs to meet the requirements specified in the Recommended Operating Conditions section and the Electrical Characteristics section.