Low Voltage Temperature Sensors Data Sheet TMP35/TMP36/TMP37 FEATURES FUNCTIONAL BLOCK DIAGRAM +V (2.7V TO 5.5V) S Low voltage operation (2.7 V to 5.5 V) Calibrated directly in C 10 mV/C scale factor (20 mV/C on TMP37) TMP35/ 2C accuracy over temperature (typ) SHUTDOWN TMP36/ V OUT TMP37 0.5C linearity (typ) Stable with large capacitive loads Specified 40C to +125C, operation to +150C Less than 50 A quiescent current Figure 1. Shutdown current 0.5 A max PIN CONFIGURATIONS Low self-heating Qualified for automotive applications V 1 5 GND OUT APPLICATIONS +V TOP VIEW S 2 (Not to Scale) Environmental control systems Thermal protection NC 3 4 SHUTDOWN Industrial process control NC = NO CONNECT Fire alarms Figure 2. RJ-5 (SOT-23) Power system monitors CPU thermal management V 1 8 +V OUT S GENERAL DESCRIPTION NC 2 7 NC TOP VIEW The TMP35/TMP36/TMP37 are low voltage, precision centi- (Not to Scale) NC 3 6 NC grade temperature sensors. They provide a voltage output that GND 4 5 SHUTDOWN is linearly proportional to the Celsius (centigrade) temperature. NC = NO CONNECT The TMP35/TMP36/TMP37 do not require any external calibration to provide typical accuracies of 1C at +25C Figure 3. R-8 (SOIC N) and 2C over the 40C to +125C temperature range. 1 2 3 The low output impedance of the TMP35/TMP36/TMP37 and BOTTOM VIEW its linear output and precise calibration simplify interfacing to (Not to Scale) temperature control circuitry and ADCs. All three devices are intended for single-supply operation from 2.7 V to 5.5 V maxi- PIN 1, +V PIN 2, V PIN 3, GND S OUT mum. The supply current runs well below 50 A, providing Figure 4. T-3 (TO-92) very low self-heatingless than 0.1C in still air. In addition, a shutdown function is provided to cut the supply current to less than 0.5 A. The TMP35 is functionally compatible with the LM35/LM45 The TMP37 is intended for applications over the range of 5C and provides a 250 mV output at 25C. The TMP35 reads to 100C and provides an output scale factor of 20 mV/C. The temperatures from 10C to 125C. The TMP36 is specified from TMP37 provides a 500 mV output at 25C. Operation extends 40C to +125C, provides a 750 mV output at 25C, and to 150C with reduced accuracy for all devices when operating operates to 125C from a single 2.7 V supply. The TMP36 is from a 5 V supply. functionally compatible with the LM50. Both the TMP35 and The TMP35/TMP36/TMP37 are available in low cost 3-lead TMP36 have an output scale factor of 10 mV/C. TO-92, 8-lead SOIC N, and 5-lead SOT-23 surface-mount packages. Rev. H Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. 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Technical Support www.analog.com 00337-004 00337-003 00337-002 00337-001TMP35/TMP36/TMP37 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Basic Temperature Sensor Connections .................................. 10 Applications ....................................................................................... 1 Fahrenheit Thermometers ........................................................ 10 General Description ......................................................................... 1 Average and Differential Temperature Measurement ........... 12 Functional Block Diagram .............................................................. 1 Microprocessor Interrupt Generator ....................................... 13 Pin Configurations ........................................................................... 1 Thermocouple Signal Conditioning with Cold-Junction Compensation ............................................................................. 14 Revision History ............................................................................... 2 Using TMP35/TMP36/TMP37 Sensors in Remote Specifications ..................................................................................... 3 Locations ..................................................................................... 15 Absolute Maximum Ratings ............................................................ 4 Temperature to 420 mA Loop Transmitter .......................... 15 Thermal Resistance ...................................................................... 4 Temperature-to-Frequency Converter .................................... 16 ESD Caution .................................................................................. 4 Driving Long Cables or Heavy Capacitive Loads .................. 17 Typical Performance Characteristics ............................................. 5 Commentary on Long-Term Stability ..................................... 17 Functional Description .................................................................... 8 Outline Dimensions ....................................................................... 18 Applications Information ................................................................ 9 Ordering Guide .......................................................................... 19 Shutdown Operation .................................................................... 9 Automotive Products ................................................................. 19 Mounting Considerations ........................................................... 9 Thermal Environment Effects .................................................... 9 REVISION HISTORY 5/15Rev. G to Rev. H 10/02Rev. B to Rev. C Changes to Specifications ................................................................. 3 Changed TMP3x to TMP35/TMP36/TMP37 ............ Throughout Changes to Figure 28 ...................................................................... 12 Deleted Text from Commentary on Long-Term Stability Changes to Ordering Guide .......................................................... 19 Section .............................................................................................. 13 Updated Outline Dimensions ....................................................... 14 11/13Rev. F to Rev. G Change to Table 1, Long-Term Stability Parameter ..................... 3 9/01Rev. A to Rev. B Change to Caption for Figure 38 .................................................. 18 Edits to Specifications ....................................................................... 2 Changes to Ordering Guide .......................................................... 19 Addition of New Figure 1 ................................................................. 2 Deletion of Wafer Test Limits Section ............................................ 3 11/10Rev. E to Rev. F Changes to Features .......................................................................... 1 6/97Rev. 0 to Rev. A Updated Outline Dimensions ....................................................... 18 Changes to Ordering Guide .......................................................... 19 3/96Revision 0: Initial Version Added Automotive Products Section........................................... 20 8/08Rev. D to Rev. E Updated Outline Dimensions ....................................................... 18 Changes to Ordering Guide .......................................................... 19 3/05Rev. C to Rev. D Updated Format .................................................................. Universal Changes to Specifications ................................................................ 3 Additions to Absolute Maximum Ratings ..................................... 4 Updated Outline Dimensions ....................................................... 18 Changes to Ordering Guide .......................................................... 19 Rev. H Page 2 of 19