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Part: TC12
Category:
Description: Low Cost, One Wire Digital Thermometer With Shutdown
Company: TelCom Semiconductor
Datasheet: Download TC12 datasheet File size : 162 kB
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Datasheet text preview:
PRELIMINARY INFORMATION
EVALUATION KIT AVAILABLE
1
TC12
LOW COST, ONE WIRE DIGITAL THERMOMETER WITH SHUTDOWN
FEATURES
s s s s s s s s s Single Wire Interface to Host Microcontroller High Precision ........ ±1°C Accuracy (Typical) Wide Measurement Range .......... 40°C to +125°C No External Components Required Complimentary (TC12C) or Open Drain Outputs (TC12N) Low Voltage Operation ...... 2.7V to 5.5V Small Package ....... SOT-23A-5 Low Cost Shutdown Input
GENERAL DESCRIPTION
The TC12 is a monolithic temperature sensor that outputs a pulse waveform whose duty cycle varies in direct proportion to measured temperature. This output format is easily converted to binary data using logic or the counter/ timer circuit on-board the system microcontroller. Typical accuracy is ±1°C over the rated measurement range of 40°C to +125°C. It operates from supply voltages as low as 2.7V. Unlike voltage output temperature sensors, the digital output of the TC12 offers superior immunity to system noise and does not require an A/D converter. Unlike two wire serial temperature sensors, the TC12 communicates over a single wire, and without complex serial protocol overhead.
2 3 4 5 6 7
APPLICATIONS
s s s Notebook Computers File Servers Desktop Computers
ORDERING INFORMATION
Part No.
TC12CVCT TC12NVCT
FUNCTIONAL BLOCK DIAGRAM
Package
Temp. Range Output Config.
Complimentary Open Drain
SOT-23A-5* 40°C to +125°C SOT-23A-5* 40°C to +125°C
TEMPERATURE TO VOLTAGE CONVERTER
VDD
TC625EV
Evaluation Kit for the TC12 and TC625
NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74).
TC12
DELTA SIGMA MODULATOR
SHDN
PIN CONFIGURATION
SOT-23A-5* (Top View)
DOUT
VDD 5 NC 4
TYPICAL APPLICATION
2.7V to 5.5V
TC12CVCT TC12NVCT
MICRO CONTROLLER
1
2
3
I/O
DOUT SHDN GND NOTE: *SOT-23A-5 is equivalent to EIAJ (SC-74)
TC12
MEASUREMENT ZONE
8
TC12-01 11/13/96
TELCOM SEMICONDUCTOR, INC.
2-31
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