ZHCSIN7E August   2018  – December 2019 TMUX6111 , TMUX6112 , TMUX6113

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化原理图
  4. 4 修订历史记录
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Thermal Information
    4. 7.4 Recommended Operating Conditions
    5. 7.5 Electrical Characteristics (Dual Supplies: ±15 V)
    6. 7.6 Switching Characteristics (Dual Supplies: ±15 V)
    7. 7.7 Electrical Characteristics (Single Supply: 12 V)
    8. 7.8 Switching Characteristics (Single Supply: 12 V)
    9. 7.9 Typical Characteristics
  8. 8 Parameter Measurement Information
    1. 8.1 Truth Tables
  9. 9 Detailed Description
    1. 9.1 Overview
      1. 9.1.1  On-Resistance
      2. 9.1.2  Off-Leakage Current
      3. 9.1.3  On-Leakage Current
      4. 9.1.4  Break-Before-Make Delay
      5. 9.1.5  Turn-On and Turn-Off Time
      6. 9.1.6  Charge Injection
      7. 9.1.7  Off Isolation
      8. 9.1.8  Channel-to-Channel Crosstalk
      9. 9.1.9  Bandwidth
      10. 9.1.10 THD + Noise
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Ultra-low Leakage Current
      2. 9.3.2 Ultra-low Charge Injection
      3. 9.3.3 Bidirectional and Rail-to-Rail Operation
    4. 9.4 Device Functional Modes
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
    3. 10.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13器件和文档支持
    1. 13.1 文档支持
      1. 13.1.1 相关文档
    2. 13.2 相关链接
    3. 13.3 接收文档更新通知
    4. 13.4 支持资源
    5. 13.5 商标
    6. 13.6 静电放电警告
    7. 13.7 Glossary
  14. 14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

10.2.2 Detailed Design Procedure

The TMUX6111, TMUX6112, or TMUX6113 switch is used in conjunction with the voltage holding capacitors (CH) to implement the sample and hold circuit. The basic operation is:

  1. When the switch (SW2 or SW3) is closed, it samples the input voltage and charges the holding capacitors (CH) to the input voltages values.
  2. When the switch (SW2 or SW3) is open, the holding capacitors (CH) holds its previous value, maintaining stable voltage at the amplifier output (VOUT).

Ideally, the switch delivers only the input signals to the holding capacitors. However, when the switch gets toggled, some amount of charge also gets transferred to the switch output in the form of charge injection, resulting slight sampling error. The TMUX6111, TMUX6112, and TMUX6113 switches have excellent charge injection performance of only 0.6 pC, making them ideal choices for this implementation to minimize sampling error.

Due to switch and capacitor leakage current, the voltage on the hold capacitors droops with time. The TMUX6111, TMUX6112, and TMUX6113 minimize the droops due to its ultra-low leakage performance. At 25°C, the TMUX6111, TMUX6112, and TMUX6113 have extremely tiny leakage current at 1 pA typical and 20 pA max.

The TMUX6111, TMUX6112, and TMUX6113 devices also support high voltage capability. The devices support up to ± 17 V dual supply operation, making it an ideal solution in this high voltage sample and hold application.

A second switch SW1 (or SW4) is also included to operate in parallel with SW2 (or SW3) to reduce pedestal error during switch toggling. Because both switches are driven at the same potential, they act as common-mode signal to the op-amp, thereby minimizing the charge injection effects caused by the switch toggling action. Compensation network consisting of RC and CC is also added to further reduce the pedestal error, whiling reducing the hold-time glitch and improving the settling time of the circuit.