ZHCSIP3G June   2005  – August 2018 LMH6572

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Truth Table
  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 ±5V Electrical Characteristics
    6. 6.6 ±3.3V Electrical Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Feature Description
      1. 7.2.1 Single Supply Operation
      2. 7.2.2 Video Performance
      3. 7.2.3 Gain Accuracy
      4. 7.2.4 Expanding the Multiplexer
      5. 7.2.5 Other Applications
        1. 7.2.5.1 Driving Capacitive Loads
  8. 8 Power Supply Recommendations
    1. 8.1 Power Dissipation
    2. 8.2 ESD Protection
  9. 9 Layout
    1. 9.1 Layout Guidelines
      1. 9.1.1 Evaluation Boards
  10. 10器件和文档支持
    1. 10.1 接收文档更新通知
    2. 10.2 社区资源
    3. 10.3 商标
    4. 10.4 静电放电警告
    5. 10.5 术语表
  11. 11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

8.1 Power Dissipation

The LMH6572 is optimized for maximum speed and performance in the small form factor of the standard SSOP package. To achieve its high level of performance, the LMH6572 consumes 23 mA of quiescent current, which cannot be neglected when considering the total package power dissipation limit. To ensure maximum output drive and highest performance, thermal shutdown is not provided. Therefore, it is of utmost importance to make sure that the TJMAX is never exceeded due to the overall power dissipation.

Follow these steps to determine the Maximum power dissipation for the LMH6572:

  1. Calculate the quiescent (no-load) power:
    2. Equation 1. PAMP = ICC* (VS)

    where

    • VS = V+ - V−
  2. Calculate the RMS power dissipated in the output stage:
    3. Equation 2. PD (rms) = rms [(VS - VOUT) * IOUT]

    where

    • VOUT and IOUT are the voltage across and the current through the external load
    • VS is the total supply voltage
  3. Calculate the total RMS power:
    4. Equation 3. PT = PAMP + PD

The maximum power that the LMH6572 package can dissipate at a given temperature can be derived with the following equation:

Equation 4. PMAX = (150°C – TAMB)/ θJA

where

  • TAMB = Ambient temperature (°C)
  • θJA = Thermal resistance, from junction to ambient, for a given package (°C/W)
  • For the SSOP package θJA is 125 °C/W