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TMP102AIDRLR bảng dữ liệu(PDF) 7 Page - Texas Instruments |
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TMP102AIDRLR bảng dữ liệu(HTML) 7 Page - Texas Instruments |
7 / 30 page 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 Submit Documentation Feedback 7 Product Folder Links: TMP102 |
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