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TMP102AIDRLR датащи(PDF) 7 Page - Texas Instruments

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номер детали TMP102AIDRLR
подробное описание детали  Low-Power Digital Temperature Sensor With SMBus and Two-Wire Serial Interface in SOT563
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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TMP102AIDRLR датащи(HTML) 7 Page - Texas Instruments

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Diode
Temp.
Sensor
DS
A/D
Converter
OSC
Control
Logic
Serial
Interface
Config.
andTemp.
Register
Temperature
SCL
1
3
6
4
ALERT
SDA
GND
2
5
V+
ADD0
TMP102
www.ti.com
SBOS397F – AUGUST 2007 – REVISED DECEMBER 2015
7 Detailed Description
7.1 Overview
The TMP102 device is a digital temperature sensor that is optimal for thermal-management and thermal-
protection applications. The TMP102 device is two-wire, SMBus and I2C interface-compatible. The device is
specified over an operating temperature range of –40°C to 125°C. See Functional Block Diagram for a block
diagram of the TMP102 device.
The temperature sensor in the TMP102 device is the chip itself. Thermal paths run through the package leads as
well as the plastic package. The package leads provide the primary thermal path because of the lower thermal
resistance of the metal.
An alternative version of the TMP102 device is available. The TMP112 device has highest accuracy, the same
micro-package, and is pin-to-pin compatible.
Table 1. Advantages of TMP112 versus TMP102
SUPPLY
SUPPLY
SPECIFIED
COMPATIBLE
SUPPLY
LOCAL SENSOR ACCURACY
DEVICE
PACKAGE
VOLTAGE
VOLTAGE
RESOLUTION
CALIBRATION
INTERFACES
CURRENT
(MAX)
(MIN)
(MAX)
DRIFT SLOPE
SOT563
12 bit
0.5°C: (0°C to 65°C)
I
2C
TMP112
10 µA
1.4 V
3.6 V
Yes
1.2 × 1.6 × 0.6
0.0625°C
1°C: (-40°C to 125°C)
SMBus
SOT563
12 bit
2°C: (25°C to 85°C)
I
2C
TMP102
10 µA
1.4 V
3.6 V
No
1.2 × 1.6 × 0.6
0.0625°C
3°C: (-40°C to 125°C)
SMBus
7.2 Functional Block Diagram
7.3 Feature Description
7.3.1 Digital Temperature Output
The digital output from each temperature measurement is stored in the read-only temperature register. The
temperature register of the TMP102 device is configured as a 12-bit, read-only register (configuration register EM
bit = 0, see the Extended Mode (EM) section), or as a 13-bit, read-only register (configuration register EM bit = 1)
that stores the output of the most recent conversion. Two bytes must be read to obtain data and are listed in
Table 8 and Table 9. 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 summarized 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 = 0) or extended mode (EM bit = 1) , and can be used to distinguish
between the two temperature register data formats. The unused bits in the temperature register always read 0.
Copyright © 2007–2015, Texas Instruments Incorporated
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Product Folder Links: TMP102


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