SCDS390B September   2018  – March 2025 TMUX1511

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
    1.     Pin Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Dynamic Characteristics
    7. 5.7 Timing Requirements
    8. 5.8 Typical Characteristics
      1. 5.8.1 Eye Diagrams
  7. 6 Parameter Measurement Information
    1. 6.1  On-Resistance
    2. 6.2  Off-Leakage Current
    3. 6.3  On-Leakage Current
    4. 6.4  IPOFF Leakage Current
    5. 6.5  Transition Time
    6. 6.6  TON (VDD) and TOFF (VDD) Time
    7. 6.7  Propagation Delay
    8. 6.8  Skew
    9. 6.9  Charge Injection
    10. 6.10 Capacitance
    11. 6.11 Off Isolation
    12. 6.12 Channel-to-Channel Crosstalk
    13. 6.13 Bandwidth
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Bidirectional Operation
      2. 7.3.2 Beyond Supply Operation
      3. 7.3.3 1.8V Logic Compatible Inputs
      4. 7.3.4 Powered-off Protection
      5. 7.3.5 Fail-Safe Logic
      6. 7.3.6 Low Capacitance
      7. 7.3.7 Integrated Pull-Down Resistors
    4. 7.4 Device Functional Modes
    5. 7.5 Truth Tables
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Protocol / Signal Isolation
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Transimpedance Amplifier Feedback Control
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curves
  10. 9 Power Supply Recommendations
  11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  12. 11Device and Documentation Support
    1. 11.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Receiving Notification of Documentation Updates
    4. 11.4 Support Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  13. 12Revision History
  14. 13Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

8.2.2 Transimpedance Amplifier Feedback Control

Switches and multiplexers are commonly used in the feedback path of amplifier circuits to provide configurable gain control. By using various resistor values on each switch path the TMUX1511 allows the system to have multiple gain settings. An external resistor, or utilizing 1 channel always being closed, ensures the amplifier isn't operating in an open loop configuration. A transimpedance amplifier (TIA) for photodiodes is a common circuit that requires gain control using a multi-channel switch to convert the output current of the photodiode into a voltage for the MCU or processor. The leakage current, capacitance, and charge injection performance of the TMUX1511 are key specifications to evaluate when selecting a device for gain control.

TMUX1511 Multiplexing Gain for a TIA CircuitFigure 8-3 Multiplexing Gain for a TIA Circuit