SCDS397 November   2018 TMUX6136


  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  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 Electrical Characteristics (Dual Supplies: ±15 V)
    6. 6.6 Switching Characteristics (Dual Supplies: ±15 V)
    7. 6.7 Electrical Characteristics (Single Supply: 12 V)
    8. 6.8 Switching Characteristics (Single Supply: 12 V)
    9. 6.9 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
      1. 7.1.1  On-Resistance
      2. 7.1.2  Off-Leakage Current
      3. 7.1.3  On-Leakage Current
      4. 7.1.4  Transition Time
      5. 7.1.5  Break-Before-Make Delay
      6. 7.1.6  Charge Injection
      7. 7.1.7  Off Isolation
      8. 7.1.8  Channel-to-Channel Crosstalk
      9. 7.1.9  Bandwidth
      10. 7.1.10 THD + Noise
      11. 7.1.11 AC Power Supply Rejection Ratio (AC PSRR)
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Ultralow Leakage Current
      2. 7.3.2 Ultralow Charge Injection
      3. 7.3.3 Bidirectional and Rail-to-Rail Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Truth Table
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curve
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Typical Application

One example to take advantage of TMUX6136’s precision performance is the implementation of parametric measurement unit (PMU) in the semiconductor automatic test equipment (ATE) application. The PMU is frequently used to characterize and measure the digital pin’s DC characteristics of a device under test (DUT). Among all the PMU’s capabilities, force voltage, measure current (FVMC), and force current, measure voltage (FCMV) are the two most typical configurations in DC characterizations.

TMUX6136 Application-FVMC.gifFigure 32. FVMC Measurement in PMU
TMUX6136 Application-FCMV.gifFigure 33. FCMV Measurement in PMU

Figure 32 shows a simplified diagram of the PMU in FVMC configuration. The control loop consists of the force amplifier with the voltage sense amplifier (unity gain in this example) making up the feedback path. Current flowing through the DUT is measured by sensing the current flowing through a sense resistor (RSENSE) in series with the DUT. The current sense amplifier with a gain of Av generates a voltage (VOUT) at its output and the voltage can then be measured by an ADC. The voltage produced at the DUT pin stays at the input voltage level (IN) as long as the force amplifier doesn’t rail out (ie. IDUT × RSENSE x Av stays within the input voltage range of the force amplifier). Depending on level of the DUT current to be measured, different gain settings need to be configured for the current sense amplifier.

Figure 33 shows a simplified diagram of the PMU in FCMV mode. The voltage VIN is now converted to a current through the following relationship:

Equation 5. Force Current = VIN / (RSENSE x Av)

The control loop consists of the force amplifier with the current sense amplifier making up the feedback path. The voltage at the DUT is sensed across the voltage sense amplifier (unity gain in this example) and presented at the output for sample.