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TMP103 데이터시트(PDF) 7 Page - Texas Instruments

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부품명 TMP103
상세설명  Low-Power, Digital Temperature Sensor with Two-Wire Interface in WCSP
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TMP103 데이터시트(HTML) 7 Page - Texas Instruments

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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
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