TMP100−EP, TMP101−EP

DIGITAL TEMPERATURE SENSOR

SGLS254A − JULY 2005 - REVISED APRIL 2010

6

POST OFFICE BOX 655303

APPLICATION INFORMATION

temperature register

The temperature register of the TMP100 or TMP101 is a 12-bit read-only register that stores the output of the

most recent conversion. Two bytes must be read to obtain data and are described in Table 3 and Table 4. The

first 12 bits are used to indicate temperature with all remaining bits equal to zero. Data format for temperature

is summarized in Table 5. Following power-up or reset, the temperature register reads 0

°C until the first

conversion is complete.

D7

D6

D5

D4

D3

D2

D1

D0

T11

T10

T9

T8

T7

T6

T5

T4

Table 3. Byte 1 of the Temperature Register

D7

D6

D5

D4

D3

D2

D1

D0

T3

T2

T1

T0

0

0

0

0

Table 4. Byte 2 of the Temperature Register

TEMPERATURE

(

5C)

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

0.0

0000 0000 0000

000

−0.25

1111 1111 1100

FFC

−25

1110 0111 0000

E70

−55

1100 1001 0000

C90

−128

1000 0000 0000

800

Table 5. Temperature Data Format

The user can obtain 9, 10, 11, or 12 bits of resolution by addressing the configuration register and setting the

resolution bits accordingly. For 9, 10, or 11 bit resolution, the most significant bits in the temperature register

are used with the unused LSBs set to zero.