ZHCSC46C February   2014  – June 2021 INA300


  1. 特性
  2. 应用
  3. 说明
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings (1)
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Timing Requirements
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Selecting a Current-Sensing Resistor
        1. Selecting a Current-Sensing Resistor: Example
      2. 7.3.2 Setting The Current-Limit Threshold
        1. Resistor-Controlled Current Limit
        2. Voltage Source-Controlled Current Limit
      3. 7.3.3 Delay Setting
      4. 7.3.4 Alert Timing Response
      5. 7.3.5 Selectable Hysteresis
      6. 7.3.6 Alert Output
      7. 7.3.7 Noise Adjustment Factor (NAF)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Alert Mode
        1. Transparent Output Mode
        2. Latch Output Mode
      2. 7.4.2 Disable Mode
      3. 7.4.3 Input Filtering
      4. 7.4.4 Using the INA300 INA300 With Common-Mode Transients Above 36 V
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Unidirectional Operation
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curve
      2. 8.2.2 Bidirectional Operation
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curve
      3. 8.2.3 Window Comparator
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curve
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 接收文档更新通知
    3. 11.3 支持资源
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 术语表
  12. 12Mechanical, Packaging, and Orderable Information


机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)


The INA300INA300 is a 36-V, common-mode comparator designed for overcurrent protection applications. To reduce the system component count, this device combines the current-sense amplifier and threshold comparison into a single product for the overcurrent detection function. Programming this comparison threshold is configured through a single external resistor, which simplifies the current design while allowing for easy adjustments to the threshold when needed. The threshold setting resistor value is selected based on an internal 20-µA current source to achieve a corresponding signal to the voltage that develops across the current-sensing or current-shunt resistor in series with the monitored load current.

The device is designed to accommodate a range of application requirements, including common-mode voltage, noise thresholds, and signal ranges. A wide signal threshold range reaching up to 250 mV is available to accommodate both power-sensitive applications requiring small dissipations across a current sense resistor and larger current-sensing resistors used in lower current applications.

Additional features available with the INA300INA300 device include a disable mode for reducing the current consumption of the device to below 10 µA, an output mode selector to enable a latched or transparent alert output, and a selectable hysteresis value and alert response delay.

The wide signal range of the device is further enhanced with an adjustable hysteresis value to adjust the characteristics of the comparator, which allows for better accommodation of the full input range. The selectable alert response delays present in the INA300INA300 device assist in optimizing device operation to account for the system noise levels and operating characteristics required from this device. Longer delay settings allow for added rejection of system noise, thus reducing the potential for false alerts resulting from noise spikes that can occur in high-speed comparators.