JAJSHZ0A April   2013  – September 2019 TMP108

PRODUCTION DATA.  

  1. 1 特長
  2. 2 アプリケーション
  3. 3 概要
    1.     Device Images
      1.      ブロック図
  4. 4 改訂履歴
  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 Diagrams
      1. 6.6.1 Two-Wire Timing Diagrams
    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 Serial Interface
      2. 7.3.2 Serial Bus Address
      3. 7.3.3 Bus Overview
      4. 7.3.4 Writing and Reading Operation
      5. 7.3.5 Slave Mode Operations
        1. 7.3.5.1 Slave Receiver Mode:
        2. 7.3.5.2 Slave Transmitter Mode:
      6. 7.3.6 SMBus Alert Function
      7. 7.3.7 General Call
      8. 7.3.8 High-Speed (Hs) Mode
      9. 7.3.9 Timeout Function
    4. 7.4 Device Functional Modes
      1. 7.4.1 Shutdown Mode (M1 = 0, M0 = 0)
      2. 7.4.2 One-Shot Mode (M1 = 0, M0 = 1)
      3. 7.4.3 Continuous Conversion Mode (M1 = 1)
    5. 7.5 Programming
      1. 7.5.1 Pointer Register
      2. 7.5.2 Temperature Register
      3. 7.5.3 Configuration Register
        1. 7.5.3.1 Hysteresis Control (HYS1 and HYS0)
        2. 7.5.3.2 Polarity (POL)
        3. 7.5.3.3 Thermostat Mode (TM)
        4. 7.5.3.4 Temperature Watchdog Flags (FL and FH)
        5. 7.5.3.5 Conversion Rate
      4. 7.5.4 High- and Low-Limit Registers
  8. 8 Application and Implementation
    1. 8.1 Application Information
    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. 11デバイスおよびドキュメントのサポート
    1. 11.1 ドキュメントの更新通知を受け取る方法
    2. 11.2 サポート・リソース
    3. 11.3 商標
    4. 11.4 静電気放電に関する注意事項
    5. 11.5 Glossary
  12. 12メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

7.5.2 Temperature Register

The temperature register is configured as a 12-bit, read-only register that stores the output of the most recent conversion. Two bytes must be read to obtain data, as shown in Table 5 and Table 6. Note that byte 1 is the most significant byte, followed by byte 2, the least significant byte. The first 12 bits are used to indicate temperature. There is no requirement to read the least significant byte if that information is not needed (for example, for resolution lower than 1°C). Table 7 summarizes the temperature data format. One LSB equals 0.0625°C. Negative numbers are represented in binary twos complement format. Following power-up or reset, the temperature register reads 0°C until the first conversion is complete. The unused bits in the temperature register always read 0.

Table 5. Byte 1 of Temperature Register

D7 D6 D5 D4 D3 D2 D1 D0
T11 T10 T9 T8 T7 T6 T5 T4

Table 6. Byte 2 of Temperature Register

D7 D6 D5 D4 D3 D2 D1 D0
T3 T2 T1 T0 0 0 0 0

Table 7. Temperature Data Format(1)

TEMPERATURE (°C) DIGITAL OUTPUT
BINARY HEX
128 0111 1111 1111 7FF
127.9375 0111 1111 1111 7FF
100 0110 0100 0000 640
80 0101 0000 0000 500
75 0100 1011 0000 4B0
50 0011 0010 0000 320
25 0001 1001 0000 190
0.25 0000 0000 0100 004
0 0000 0000 0000 000
–0.25 1111 1111 1100 FFC
–25 1110 0111 0000 E70
–55 1100 1001 0000 C90
(1) The temperature sensor ADC resolution is 0.0625°C/count.

Table 7 does not supply a full list of all temperatures. Use the following rules to obtain the digital data format for a given temperature.

To convert positive temperatures to a digital data format:

Divide the temperature by the resolution. Then, convert the result to binary code with a 12-bit, left-justified format, and MSB = 0 to denote a positive sign.

Example: (+50°C)/(0.0625°C/count) = 800 = 320h = 0011 0010 0000

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 12-bit, left-justified format. Then, generate the twos complement of the result by complementing the binary number and adding one. Denote a negative number with MSB = 1.

Example: (|–25°C|)/(0.0625°C/count) = 400 = 190h = 0001 1001 0000

Twos complement format: 1110 0110 1111 + 1 = 1110 0111 0000