SCDS388A November   2018  – November 2018 TMUX1108

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Application Example
      2.      Block Diagram
  4. Revision History
  5. Device Comparison Table
  6. Pin Configuration and Functions
    1.     Pin Functions
  7. Specifications
    1. 7.1  Absolute Maximum Ratings
    2. 7.2  ESD Ratings
    3. 7.3  Recommended Operating Conditions
    4. 7.4  Thermal Information
    5. 7.5  Electrical Characteristics (VDD = 5 V ±10 %)
    6. 7.6  Electrical Characteristics (VDD = 3.3 V ±10 %)
    7. 7.7  Electrical Characteristics (VDD = 2.5 V ±10 %), (VSS = –2.5 V ±10 %)
    8. 7.8  Electrical Characteristics (VDD = 1.8 V ±10 %)
    9. 7.9  Electrical Characteristics (VDD = 1.2 V ±10 %)
    10. 7.10 Typical Characteristics
  8. Detailed Description
    1. 8.1 Overview
      1. 8.1.1  On-Resistance
      2. 8.1.2  Off-Leakage Current
      3. 8.1.3  On-Leakage Current
      4. 8.1.4  Transition Time
      5. 8.1.5  Break-Before-Make Delay
      6. 8.1.6  Turn-On and Turn-Off Time
      7. 8.1.7  Charge Injection
      8. 8.1.8  Off Isolation
      9. 8.1.9  Crosstalk
      10. 8.1.10 Bandwidth
    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 1.8 V 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
  9. Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
    3. 9.3 Design Requirements
    4. 9.4 Detailed Design Procedure
    5. 9.5 Application Curve
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
      1. 11.1.1 Layout Information
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Related Links
    3. 12.3 Receiving Notification of Documentation Updates
    4. 12.4 Community Resources
    5. 12.5 Trademarks
    6. 12.6 Electrostatic Discharge Caution
    7. 12.7 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

Detailed Design Procedure

The TMUX1108 can be operated without any external components except for the supply decoupling capacitors. If the device desired power-up state is disabled, the enable pin should have a weak pull-down resistor and be controlled by the MCU via GPIO. All inputs being muxed to the ADC must fall within the recommend operating conditions of the TMUX1108 including signal range and continuous current. For this design with a supply of 3.3 V the signal range can be 0 V to 3.3 V and the max continuous current can be 30 mA.

The design example highlights a multiplexed, data-acquisition system for highest system linearity and fast settling. The overall system block diagram is illustrated in Figure 32. The circuit is a multichannel, data-acquisition signal chain consisting of an input low-pass filter, mux, mux output buffer, SAR ADC driver, and the reference buffer. The architecture allows fast sampling of multiple channels using a single ADC, providing a low-cost solution.