SBOS466B December   2009  – December 2018 TMP20

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Block Diagram
    2.     Device Quiescent Current Over Temperature
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Transfer Function
        1. 7.3.1.1 Example 1
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Output Drive and Capacitive Loads
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 TINA-TI (Free Download Software)
        1. 11.1.1.1 Using TINA-TI SPICE-Based Analog Simulation Program with the TMP20
      2. 11.1.2 Development Support
    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

7.3.1 Transfer Function

The analog output of the TMP20 over the –55°C to +130°C temperature range corresponds to the parabolic transfer function shown in Equation 1:

Equation 1. TMP20 sbos466a_equation1.gif

where

  • the temperature (T) is in °C.

When solving for temperature, the equation is shown as Equation 2:

Equation 2. TMP20 10090823.png

These equations apply over the entire operating range of –55°C to +130°C.

A simplified linear transfer function referenced at 25°C is shown in Equation 3:

Equation 3. TMP20 sbos466a_equation2.gif

Linear transfer functions are calculated for limited temperature ranges by calculating the slope and offset for that limited range, where slope is calculated by Equation 4:

Equation 4. TMP20 sbos466a_equation3.gif

where

  • T equals the temperature at the middle of the temperature range of interest

The offset in the linear transfer function is calculated with Equation 5:

Equation 5. TMP20 sbos466a_equation4.gif

where

  • VOUT(TMAX) is the calculated output voltage at TMAX as determined from Equation 1.

VOUT(T) is the calculated output voltage at T as calculated by Equation 1.