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TMP451-Q1

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SLOS877B – OCTOBER 2014 – REVISED JUNE 2019

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Copyright © 2014–2019, Texas Instruments Incorporated

Feature Description (continued)

(1)

Resolution is 1°C/count. Negative values produce a read of 0°C.

(2)

Resolution is 1°C/count. All values are unsigned with a –64°C offset.

Table 1. Temperature Data Format (Local and Remote Temperature High Bytes)

TEMPERATURE

(°C)

LOCAL AND REMOTE TEMPERATURE REGISTER

HIGH BYTE VALUE (1°C RESOLUTION)

BINARY

HEX

BINARY

HEX

–64

0000 0000

00

0000 0000

00

–50

0000 0000

00

0000 1110

0E

–25

0000 0000

00

0010 0111

27

0

0000 0000

00

0100 0000

40

1

0000 0001

01

0100 0001

41

5

0000 0101

05

0100 0101

45

10

0000 1010

0A

0100 1010

4A

25

0001 1001

19

0101 1001

59

50

0011 0010

32

0111 0010

72

75

0100 1011

4B

1000 1011

8B

100

0110 0100

64

1010 0100

A4

125

0111 1101

7D

1011 1101

BD

127

0111 1111

7F

1011 1111

BF

150

0111 1111

7F

1101 0110

D6

175

0111 1111

7F

1110 1111

EF

191

0111 1111

7F

1111 1111

FF

(1)

Resolution is 0.0625°C/count. All possible values are shown.

Both local and remote temperature data use two bytes for data storage. The high byte stores the temperature

with 1°C resolution. The second or low byte stores the decimal fraction value of the temperature and allows a

higher measurement resolution, as shown in Table 2. The measurement resolution for both the local and the

remote channels is 0.0625°C.

Table 2. Decimal Fraction Temperature Data Format (Local and Remote Temperature Low Bytes)

TEMP

(°C)

TEMPERATURE REGISTER LOW BYTE VALUE

STANDARD AND EXTENDED BINARY

HEX

0

0000 0000

00

0.0625

0001 0000

10

0.1250

0010 0000

20

0.1875

0011 0000

30

0.2500

0100 0000

40

0.3125

0101 0000

50

0.3750

0110 0000

60

0.4375

0111 0000

70

0.5000

1000 0000

80

0.5625

1001 0000

90

0.6250

1010 0000

A0

0.6875

1011 0000

B0

0.7500

1100 0000

C0

0.8125

1101 0000

D0

0.8750

1110 0000

E0

0.9385

1111 0000

F0