SBOS486I July   2009  – December 2018 TMP303

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      TMP303 Functional Block Diagram
      2.      Typical Trip Threshold Accuracy at -20°C to 125°C
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 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
    6. 7.6 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 HYSTSET0, HYSTSET1 and SOH Functionality
      2. 8.3.2 TMP303 Power Up and Timing
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 TMP303 Typical Configuration
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
      2. 9.2.2 TMP303 With Switches
      3. 9.2.3 Simple Fan Controller
      4. 9.2.4 Wireless Fixed Temperature Heat Detector
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Receiving Notification of Documentation Updates
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

Package Options

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

8.3.2 TMP303 Power Up and Timing

At device power up, the TMP303 exerts OUT = high, and typically requires 26 ms to return to a low state only if the temperature falls within the hysteresis window set by HYSTSET0 and HYSTSET1.

The tolerance of the thermal response time is largely a result of the differences in conversion time, which varies from 20 ms to 35 ms; likewise, this conversion does not take place after a power cycle until the supply voltage has reached a level of at least 1.4 V. This sequence is illustrated in Figure 11.

TMP303 ai_startup_delay_vout_bos486.gifFigure 11. TMP303A Start-Up Delay vs Output Voltage (HYSTSET0 = HYSTSET1 = VS)

After the TMP303 powers up, all successive thermal response results for the device are achieved in a time frame of 0.985 s to 1 s. This period is the minimum time frame required for the push-pull output (OUT) to change its state from high to low (or conversely) when the device is active.

A maximum low output voltage is defined as a voltage level equivalent to (0.2 × VS); likewise, a minimum high-output voltage is defined as (0.8 × VS). The timing associated with start-up time and conversion is shown in Figure 12.

TMP303 ai_startup_convert_timing_bos486.gifFigure 12. TMP303A Start-Up and Conversion Timing (HYSTSET0 = HYSTSET1 = VS)