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TMP103 데이터시트(PDF) 7 Page - Texas Instruments |
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TMP103 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 23 page TMP103 www.ti.com SBOS545A – FEBRUARY 2011 – REVISED MARCH 2011 Table 3. Temperature Register TEMPERATURE REGISTER D7 D6 D5 D4 D3 D2 D1 D0 The Temperature Register of the TMP103 is T7 T6 T5 T4 T3 T2 T1 T0 configured as an eight-bit, read-only register that stores the output of the most recent conversion. A Negative numbers are represented in binary twos single byte must be read to obtain data, and is complement format. Following power-up or reset, the described in Table 3. The data format for temperature Temperature Register reads 0 °C until the first is summarized in Table 4. One LSB equals 1 °C. conversion is complete. Table 4. 8-Bit Temperature Data Format(1) TEMPERATURE ( °C) DIGITAL OUTPUT (BINARY) HEX 128 0111 1111 7F 127 0111 1111 7F 100 0110 0100 64 80 0101 0000 50 75 0100 1011 4B 50 0011 0010 32 25 0001 1001 19 0 0000 0000 00 –1 1111 1111 FF –25 1110 0111 E7 –55 1100 1001 C9 (1) The resolution for the ADC is 1 °C/count, where count is equal to the digital output of the ADC. For positive temperatures (for example, +50 °C): Twos complement is not performed on positive numbers. Therefore, simply convert the number to binary code, left-justified format. Denote a positive number with MSB = '0'. Example: (+50 °C)/(1°C/count) = 50 = 32h = 0011 0010 For negative temperatures (for example, –25°C): Generate the twos complement of a negative number by complementing the absolute value binary number and adding 1. Denote a negative number with MSB = '1'. Example: (| –25°C|)/(1°C/count) = 25 = 19h = 0001 1001 Twos complement format: 1110 0110 + 1 = 1110 0111 Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): TMP103 |
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