SBOS716D May   2015  – January 2020 TMP107

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application
  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 Timing Requirements
    7. 6.7 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 Digital Temperature Output
      2. 7.3.2 Temperature Limits and Alert
        1. 7.3.2.1 ALERT1, ALERT2, R1, and R2 Pins
      3. 7.3.3 SMAART Wire™ Communication Interface
        1. 7.3.3.1 Communication Protocol
          1. 7.3.3.1.1 Calibration Phase
          2. 7.3.3.1.2 Command and Address Phase
            1. 7.3.3.1.2.1 Global or Individual (G/nI) Bit
            2. 7.3.3.1.2.2 Read/Write (R/nW) Bit
            3. 7.3.3.1.2.3 Command or Address (C/nA) Bit:
          3. 7.3.3.1.3 Register Pointer Phase
          4. 7.3.3.1.4 Data Phase
        2. 7.3.3.2 SMAART Wire™ Operations
          1. 7.3.3.2.1 Command Operations
            1. 7.3.3.2.1.1 Address Initialize
            2. 7.3.3.2.1.2 Last Device Poll
            3. 7.3.3.2.1.3 Global Software Reset
          2. 7.3.3.2.2 Address Operations
            1. 7.3.3.2.2.1 Individual Write
            2. 7.3.3.2.2.2 Individual Read
            3. 7.3.3.2.2.3 Global Write
            4. 7.3.3.2.2.4 Global Read
    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
      1. 7.5.1 EEPROM
      2. 7.5.2 EEPROM Operations
        1. 7.5.2.1 EEPROM Unlock
        2. 7.5.2.2 EEPROM Lock
        3. 7.5.2.3 EEPROM Programming
        4. 7.5.2.4 EEPROM Acquire or Read
    6. 7.6 Register Map
      1. 7.6.1 Temperature Register (address = 0h) [reset = 0h]
        1. Table 4. Temperature Register Field Descriptions
      2. 7.6.2 Configuration Register (address = 1h) [reset = A000h]
        1. Table 5. Configuration Register Field Descriptions
      3. 7.6.3 High Limit 1 Register (address = 2h) [reset = 7FFCh]
        1. Table 7. High Limit 1 Register Field Descriptions
      4. 7.6.4 Low Limit 1 Register (address = 3h) [reset = 8000h]
        1. Table 8. Low Limit 1 Register Field Descriptions
      5. 7.6.5 High Limit 2 Register (address = 4h) [reset = 7FFCh]
        1. Table 9. High Limit 2 Register Field Descriptions
      6. 7.6.6 Low Limit 2 Register (address = 5h) [reset = 8000h]
        1. Table 10. Low Limit 2 Register Field Descriptions
      7. 7.6.7 EEPROM n Register (where n = 1 to 8) (addresses = 6h to Dh) [reset = 0h]
        1. Table 11. EEPROM Register bits
      8. 7.6.8 Die ID Register (address = Fh) [reset = 1107h]
        1. Table 12. Die ID Register Field Descriptions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Connecting Multiple Devices
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Voltage Drop Effect
          2. 8.2.1.2.2 EEPROM Programming Current
          3. 8.2.1.2.3 Power Savings
          4. 8.2.1.2.4 Accuracy
          5. 8.2.1.2.5 Electromagnetic Interference (EMI)
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Connecting ALERT1 and ALERT2 Pins
      3. 8.2.3 ALERT1 and ALERT2 Pins Used as General-Purpose Output (GPO)
  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 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

7.3.1 Digital Temperature Output

The 14-bit digital output from each temperature measurement conversion is stored in the temperature register. Read two bytes to obtain the data. Table 1 summarizes the temperature data format. Negative numbers are represented in binary twos complement format. The temperature sensor resolution is 0.015625ºC/LSB.

Table 1. Temperature Data Format

TEMPERATURE (°C) DIGITAL OUTPUT
BINARY HEX
127.984 01 1111 1111 1111 1FFF
100 01 1001 0000 0000 1900
80 01 0100 0000 1000 1408
75 01 0010 1100 0000 12C0
50 00 1100 1000 0000 C80
25 00 0110 0100 0000 640
0.25 00 0000 0001 0000 10
0 00 0000 0000 0000 0
–0.25 11 1111 1111 0000 3FF0
–25 11 1001 1100 0000 39C0
–55 11 0010 0100 0000 3240

Use the following rules to obtain the data for a given temperature, and vice versa.

  • To convert positive temperatures to a digital data format:

    • Divide the temperature by the resolution. Then, convert the result to binary code with a 14-bit, left-justified format.

    Example: (50°C) / (0.015625°C / LSB) = 3200 = C80h = 00 1100 1000 0000 = C80h

  • To convert a positive digital data format to temperature:

    • Convert the 14-bit, left-justified, binary temperature result to a decimal number. Then, multiply the decimal number by the resolution to obtain the positive temperature.

    Example: 00 1100 1000 0000 = C80h = 3200 × (0.015625°C / LSB) = 50°C

  • To convert negative temperatures to a digital data format:

    • Divide the absolute value of the temperature by the resolution and convert the result to binary code with a 14-bit, left-justified format. Then, generate the twos complement of the result by complementing the binary number and adding one.

    Example: (|–25°C|) / (0.015625°C / LSB) = 1600 = 640h = 00 0110 0100 0000

    Twos complement format: 11 1001 1011 1111 + 1 = 11 1001 1100 0000 = 39C0h

  • To convert a negative digital data format to temperature:

    • Generate the twos complement of the 14-bit, left-justified binary number of the temperature result by complementing the binary number and adding one. This number is the binary representation of the absolute value of the temperature. Convert to a decimal number and multiply by the resolution to obtain the absolute temperature, then multiply by –1 for the negative sign.

    Example: 11 1001 1100 0000 has a twos complement of 00 0110 0011 1111 + 1 = 00 0110 0100 0000

    Convert to temperature: 00 0110 0100 0000 = 640h = 1600; 1600 × (0.015625°C / LSB) = 25°C = (|–25°C|); (|–25°C|) × (–1) = –25°C