TMP112

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 resolution for the Temp ADC in Internal Temperature mode is 0.0625°C/count.

For positive temperatures (for example, +50°C):

Twos complement is not performed on positive numbers. Therefore, simply convert the number to binary

code with the 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

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|)/(0.0625°C/count) = 400 = 190h = 0001 1001 0000

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

Table 6. 13-Bit Temperature Data Format

TEMPERATURE (°C)

DIGITAL OUTPUT (BINARY)

HEX

150

0 1001 0110 0000

0960

128

0 1000 0000 0000

0800

127.9375

0 0111 1111 1111

07FF

100

0 0110 0100 0000

0640

80

0 0101 0000 0000

0500

75

0 0100 1011 0000

04B0

50

0 0011 0010 0000

0320

25

0 0001 1001 0000

0190

0.25

0 0000 0000 0100

0004

0

0 0000 0000 0000

0000

–0.25

1 1111 1111 1100

1FFC

–25

1 1110 0111 0000

1E70

–55

1 1100 1001 0000

1C90

8

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