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TMP112-Q1 Datasheet(PDF) 9 Page - Texas Instruments

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Part # TMP112-Q1
Description  TMP112-Q1 Automotive Grade High-Accuracy, Low-Power, Digital Temperature Sensor in SOT563
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TMP112-Q1 Datasheet(HTML) 9 Page - Texas Instruments

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ALERT
Core
SCL
GND
V+
A0
V+
SDA
Device
TMP112-Q1
www.ti.com
SLOS887D – SEPTEMBER 2014 – REVISED DECEMBER 2015
Functional Block Diagram (continued)
Figure 9. Equivalent Internal ESD Circuitry
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
register. The temperature register of the TMP112-Q1 device is configured as a 12-bit read-only register (setting
the EM bit to 0 in the configuration register; see the Extended Mode (EM) section), or as a 13-bit 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 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 2 and Table 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 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
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 temperature ADC in internal temperature mode is 0.0625°C/count.
Copyright © 2014–2015, Texas Instruments Incorporated
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