SCDS466 august   2023 TMUX7612

ADVANCE INFORMATION  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Thermal Information
    4. 6.4  Recommended Operating Conditions
    5. 6.5  Source or Drain Continuous Current Switch Pairs
    6. 6.6  Source or Drain Pulsed Current
    7. 6.7  Electrical Characteristics (12 V Single Supply)
    8. 6.8  Switching Characteristics (12 V Single Supply)
    9. 6.9  Electrical Characteristics (±15 V Dual Supply)
    10. 6.10 Switching Characteristics (±15 V Dual Supply)
    11. 6.11 Electrical Characteristics (±20 V Dual Supply)
    12. 6.12 Switching Characteristics (±20 V Dual Supply)
    13. 6.13 Electrical Characteristics (+37.5 V/–12.5 V Dual Supply)
    14. 6.14 Switching Characteristics (+37.5 V/–12.5 V Dual Supply)
    15. 6.15 Typical Characteristics
  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 Rail-to-Rail Operation
      3. 7.3.3 1.8 V Logic Compatible Inputs
      4. 7.3.4 Flat On-Resistance
      5. 7.3.5 Power-Up Sequence Free
      6. 7.3.6 Ultra-Low Charge Injection
      7. 7.3.7 Ultra-Low Leakage Current
    4. 7.4 Device Functional Modes
      1. 7.4.1 Truth Tables
  9. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Detailed Design Procedure
      2. 8.2.2 Design Requirements
      3. 8.2.3 Application Curve
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Mechanical, Packaging, and Orderable Information
    1. 10.1 Tape and Reel Information
    2. 10.2 Mechanical Data

Package Options

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

8.2 Typical Application

New generation LCD test equipment often requires simultaneous high-precision, high-voltage, multi-channel measurement capabilities and minimum channel-to-channel variation during measurement.

In LCD test systems, the parametric measurement unit (PMU) is tasked to measure device (DUT) LCD driver parametric information in terms of voltage and current. To measure current, voltage is applied at the DUT pin. To measure voltage, current is applied at the DUT pin. A 4-channel SPST switch can be used to select appropriate signals in the feedback path and measurement path in the two measurement modes. The PMU typically supports a voltage range of -12 V to 35 V and can be any combination of high or low current. An appropriate switch like the TMUX7612 with low on-resistance works well in these applications to increase the capability of higher current and even PMU ganging where multiple PMU channels are connected in parallel, allowing for a higher current output. Figure 8-1 shows a simplified diagram of such an implementation. The extremely flat on-resistance profile reduced the IR drop variation across the switch, enabling a much more streamlined calibration.

For calibration and diagnostics, the LCD test equipment also includes signals routed to the input path to confirm the system is calibrated across the life of a product or after installation. The multiplexer connects the selected signal to the appropriate pin. The TMUX7612 devices with very low RON (1.35 Ω typical) and on-leakage current (1 nA maximum) allows these devices to be used in precision measurement applications providing rail-to-rail operation suitable for high voltage testing.

GUID-20230607-SS0I-NBJ0-XNQH-M76XK9HLMQR1-low.svgFigure 8-1 PMU Ganging Multiple Channels in Parallel