TMP112 datasheet(16/46 Pages) TI2

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ALERT

Core

SCL

GND

V+

SDA

Device

Figure 7-2. Equivalent Internal ESD Circuitry

(SOT563 Package)

Core

5 V+

GND

SDA

SCL

ADD0

TMP112D-Q1

(DPW Package)

Figure 7-3. Equivalent Internal ESD Circuitry

(X2SON Package)

7.3 Feature Description

7.3.1 Digital Temperature Output

The digital output from each temperature measurement conversion is stored in the read-only temperature

read-only register (setting the EM bit to 1 in the configuration register) that stores the output of the most recent

conversion. Two bytes must be read to obtain data and are listed in Table 7-8. Byte 1 is the most significant byte

(MSB), followed by byte 2, the least significant byte (LSB). The first 12 bits (13 bits in extended mode) are used

to indicate temperature. The least significant byte does not have to be read if that information is not needed. The

data format for temperature is listed in Table 7-2 and Table 7-3. One LSB equals 0.0625°C. Negative numbers

are represented in binary twos complement format. Following power up or reset, the temperature register reads

0°C until the first conversion is complete. Bit D0 of byte 2 indicates normal mode (EM bit equals 0) or extended

mode (EM bit equals 1), and can be used to distinguish between the two temperature register data formats. The

unused bits in the temperature register always read 0.

Table 7-2. 12-Bit Temperature Data Format (1)

TEMPERATURE (°C)

DIGITAL OUTPUT (BINARY)

HEX

128

0111 1111 1111

7FF

127.9375

0111 1111 1111

7FF

100

0110 0100 0000

640

0101 0000 0000

500

0100 1011 0000

4B0

0011 0010 0000

320

0001 1001 0000

190

0.25

0000 0000 0100

004

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 temperature ADC in internal temperature mode is 0.0625°C/count.

TMP112-Q1, TMP112D-Q1

SLOS887G – SEPTEMBER 2014 – REVISED MAY 2025

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