ZHCSGK4E September   2017  – November 2019 TLV7011 , TLV7012 , TLV7021 , TLV7022

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      X2SON 封装与 SC70 和美元硬币对比
      2.      传播延迟与过驱动
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
    2.     Pin Functions: TLV7012/22
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings (Single)
    2. 6.2  Absolute Maximum Ratings (Dual)
    3. 6.3  ESD Ratings
    4. 6.4  Recommended Operating Conditions (Single)
    5. 6.5  Recommended Operating Conditions (Dual)
    6. 6.6  Thermal Information (Single)
    7. 6.7  Thermal Information (Dual)
    8. 6.8  Electrical Characteristics (Single)
    9. 6.9  Switching Characteristics (Single)
    10. 6.10 Electrical Characteristics (Dual)
    11. 6.11 Switching Characteristics (Dual)
    12. 6.12 Timing Diagrams
    13. 6.13 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
    4. 7.4 Device Functional Modes
      1. 7.4.1 Inputs
      2. 7.4.2 Internal Hysteresis
      3. 7.4.3 Output
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Inverting Comparator With Hysteresis for TLV701x
      2. 8.1.2 Noninverting Comparator With Hysteresis for TLV701x
    2. 8.2 Typical Applications
      1. 8.2.1 Window Comparator
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curve
      2. 8.2.2 IR Receiver Analog Front End
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 Square-Wave Oscillator
        1. 8.2.3.1 Design Requirements
        2. 8.2.3.2 Detailed Design Procedure
        3. 8.2.3.3 Application Curve
  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 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 评估模块
    2. 11.2 相关链接
    3. 11.3 接收文档更新通知
    4. 11.4 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 Glossary
  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

8.2.3.2 Detailed Design Procedure

The oscillation frequency is determined by the resistor and capacitor values. The following calculation provides details of the steps.

TLV7011 TLV7021 TLV7012 TLV7022 fbd-02-slvsdm5.pngFigure 45. Square-Wave Oscillator Timing Thresholds

First consider the output of Figure Figure 44 is high which indicates the inverted input VC is lower than the noninverting input (VA). This causes the C1 to be charged through R4, and the voltage VC increases until it is equal to the noninverting input. The value of VA at the point is calculated by Equation 7.

Equation 7. TLV7011 TLV7021 TLV7012 TLV7022 equation-slvsdm5-1.gif

if R1 = R2= R3, then VA1 = 2 VCC/ 3

At this time the comparator output trips pulling down the output to the negative rail. The value of VAat this point is calculated by Equation 8.

Equation 8. TLV7011 TLV7021 TLV7012 TLV7022 equation-SLVsdm5x-2.gif

if R1 = R2 = R3, then VA2 = VCC/3

The C1 now discharges though the R4, and the voltage VCC decreases until it reaches VA2. At this point, the output switches back to the starting state. The oscillation period equals to the time duration from for C1 from 2VCC/3 to VCC / 3 then back to 2VCC/3, which is given by R4C1 × ln 2 fro each trip. Therefore, the total time duration is calculated as 2 R4C1 × ln 2. The oscillation frequency can be obtained by Equation 9:

Equation 9. TLV7011 TLV7021 TLV7012 TLV7022 eq_9_SLVSDM5.gif