SCDS410D March   2019  – February 2024 TMUX1101 , TMUX1102

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison Table
  6. 5 Pin Configuration and Functions
  7. 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 (VDD = 5V ±10 %)
    6. 6.6 Electrical Characteristics (VDD = 3.3V ±10 %)
    7. 6.7 Electrical Characteristics (VDD = 1.8V ±10 %)
    8. 6.8 Electrical Characteristics (VDD = 1.2V ±10 %)
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
    1. 7.1 On-Resistance
    2. 7.2 Off-Leakage Current
    3. 7.3 On-Leakage Current
    4. 7.4 Transition Time
    5. 7.5 Charge Injection
    6. 7.6 Off Isolation
    7. 7.7 Bandwidth
  9. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Bidirectional Operation
      2. 8.3.2 Rail-to-Rail Operation
      3. 8.3.3 1.8V Logic Compatible Inputs
      4. 8.3.4 Fail-Safe Logic
      5. 8.3.5 Ultra-Low Leakage Current
      6. 8.3.6 Ultra-Low Charge Injection
    4. 8.4 Device Functional Modes
      1. 8.4.1 Truth Tables
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application - Sample-and-Hold Circuit
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
    3. 9.3 Typical Application - Switched Gain Amplifier
      1. 9.3.1 Design Requirements
      2. 9.3.2 Detailed Design Procedure
      3. 9.3.3 Application Curve
    4. 9.4 Power Supply Recommendations
    5. 9.5 Layout
      1. 9.5.1 Layout Guidelines
      2. 9.5.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • DBV|5
  • DCK|5
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.3 Typical Application - Switched Gain Amplifier

Switches and multiplexers are commonly used in the feedback path of amplifier circuits to provide configurable gain control. By using various resistor values on the switch path, the TMUX110x allows the system to have multiple gain settings. An external resistor ensures the amplifier is not operating in an open loop configuration. A transimpedance amplifier (TIA) for photodiode inputs is a common circuit that requires gain control using a switch to convert the output current of the photodiode into a voltage for the MCU or processor. The amount of light present during a photodiode measurement is dependent on the time of day and available light source. An external switch such as the TMUX110x can be utilized to increase the gain when a smaller photodiode current is present. The leakage current, capacitance, and charge injection performance of the TMUX110x are key specifications to evaluate when selecting a device for gain control. An example switched gain amplifier circuit is shown in Figure 9-4.

GUID-DBE593CE-2FDE-47F3-A603-C3C2E38FD443-low.gifFigure 9-4 Configurable Gain Setting of a TIA Circuit