SBOS721B October   2014  – October 2024 TMP75B-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Device Comparison
  6. 5 Pin Configuration and Functions
  7. 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 Timing Requirements
    7. 6.7 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 Digital Temperature Output
      2. 7.3.2 Temperature Limits and Alert
      3. 7.3.3 Serial Interface
        1. 7.3.3.1  Bus Overview
        2. 7.3.3.2  Serial Bus Address
        3. 7.3.3.3  Writing and Reading Operation
        4. 7.3.3.4  Target-Mode Operations
          1. 7.3.3.4.1 Target Receiver Mode:
          2. 7.3.3.4.2 Target Transmitter Mode:
        5. 7.3.3.5  SMBus Alert Function
        6. 7.3.3.6  General Call
        7. 7.3.3.7  High-Speed (Hs) Mode
        8. 7.3.3.8  Timeout Function
        9. 7.3.3.9  Two-Wire Timing
        10. 7.3.3.10 Two-Wire Timing Diagrams
    4. 7.4 Device Functional Modes
      1. 7.4.1 Continuous-Conversion Mode
      2. 7.4.2 Shutdown Mode
      3. 7.4.3 One-Shot Mode
    5. 7.5 Programming
  9. 8 Register Map
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
      3. 9.2.3 Application Curve
    3. 9.3 Power-Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

7.4.1 Continuous-Conversion Mode

The default mode of the TMP75B-Q1 is continuous conversion, where the ADC performs continuous temperature conversions and stores each result to the temperature register, overwriting the result from the previous conversion. Conversion rate bits CR1 and CR0 in the configuration register configure the TMP75B-Q1 for typical conversion rates of 37Hz, 18Hz, 9Hz, or 4Hz. The TMP75B-Q1 has a typical conversion time of 27ms. To achieve different conversion rates, the TMP75B-Q1 makes a conversion, and then powers down and waits for the appropriate delay set by CR1 and CR0. The default rate is 37Hz (no delay between conversions).Table 7-3 shows the settings for CR1 and CR0.

Table 7-3 Conversion Rate Settings
CR1CR0CONVERSION RATE (TYP)IQ (TYP)
0037Hz (continuous conversion, default)45μA
0118Hz22μA
109Hz12μA
114Hz6.5μA

After power-up or a general-call reset, the TMP75B-Q1 immediately starts a conversion, as shown in Figure 7-6. The first result is available after 27ms (typical). The active quiescent current during conversion is 45μA (typical at 25°C). The quiescent current during delay is 1μA (typical at 25°C).

TMP75B-Q1 Conversion Start
A. Delay is set by the CR bits in the configuration register.
Figure 7-6 Conversion Start