SNIS218B September   2019  – June 2022 TMP390-Q1

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and 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 TMP390-Q1 Programming Tables
      2. 7.3.2 Trip Test
      3. 7.3.3 20°C Hysteresis
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Applications Information
    2. 8.2 Typical Applications
      1. 8.2.1 Simplified Application Schematic
        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 TMP390-Q1 With 10°C Hysteresis
        1. 8.2.2.1 Design Requirements
        2. 8.2.2.2 Detailed Design Procedure
        3. 8.2.2.3 Application Curve
      3. 8.2.3 One Channel Operation for Hot Trip Point up to 124°C
        1. 8.2.3.1 Application Curve
      4. 8.2.4 One Channel Operation for Cold Trip Point
        1. 8.2.4.1 Application Curve
  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 Receiving Notification of Documentation Updates
    2. 11.2 Support Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

8.2.2.2 Detailed Design Procedure

SETA sets the +90°C threshold using 78.7 kΩ. SETB sets the –25°C trip point and 10°C hysteresis using 215 kΩ. These values were determined using Table 7-1 and Table 7-2. These resistors should have maximum of 1% tolerance and 100 ppm/°C or less over the desired temperature range. A summary of the resistor settings used in this example is shown in Table 8-1. See Table 7-1 and Table 7-2 for additional trip points and hysteresis configurations.

The switching output of the TMP390-Q1 can be visualized with the output diagram shown in Figure 8-4. It is key to notice that hysteresis is subtracted from the Channel A threshold and added to the Channel B threshold values. OUTA remains high until the sensor reaches +90°C where the output goes low, and returns high after the temperature drops back down to +80°C. OUTB trips when the temperature stays below –25°C and goes low until the temperature rises above –15°C.

Table 8-1 Example Resistor Settings and Trip Points
CHANNELRESISTOR SETTING (kΩ)HYSTERESIS (°C)TRIP TEMPERATURE (°C)
SETA78.710+90
SETB215–25