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LMT84
SNIS167E – MARCH 2013 – REVISED OCTOBER 2017
LMT84 1.5-V, SC70/TO-92/TO-92S, Analog Temperature Sensors
1 Features
•1 LMT84LPG (TO-92S package) has a Fast Thermal Time Constant, 10-s Typical (1.2 m/s Airflow)
• Very Accurate: ±0.4°C Typical • Low 1.5-V Operation • Average Sensor Gain of -5.5 mV/°C • Low 5.4-µA Quiescent Current • Wide Temperature Range: –50°C to 150°C • Output is Short-Circuit Protected • Push-Pull Output With ±50-µA Drive Capability • Footprint Compatible With the Industry-Standard
LM20/19 and LM35 Temperature Sensors • Cost-Effective Alternative to Thermistors
2 Applications
• Infotainment and Cluster • Powertrain Systems • Smoke and Heat Detectors • Drones • Appliances
3 Description
The LMT84 is a precision CMOS temperature sensor with ±0.4°C typical accuracy (±2.7°C maximum) and a linear analog output voltage that is inversely proportional to temperature. The 1.5-V supply voltage operation, 5.4-μA quiescent current, and 0.7-ms power-on time enable effective power-cycling architectures to minimize power consumption for battery-powered applications such as drones and sensor nodes. The LMT84LPG through-hole TO-92S package fast thermal time constant supports offboard time-temperature sensitive applications such as smoke and heat detectors. The accuracy over the wide operating range and other features make the LMT84 an excellent alternative to thermistors.
For devices with different average sensor gains and comparable accuracy, refer to Comparable Alternative Devices for alternative devices in the LMT8x family.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
SOT (5)
2.00 mm x 1.25 mm
LMT84
TO-92 (3)
4.30 mm x 3.50 mm
TO-92S (3)
4.00 mm x 3.15 mm
(1) For all available packages, see the orderable addendum addendum at the end of the data sheet.
FINAL TEMPERATURE
Thermal Time Constant
100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0 0
20 40 60 TIME (s)
* Fast thermal response NTC
LMT8xLPG Thermistor
80 100
D003
Output Voltage vs Temperature
VDD (+1.5V to +5.5V) VDD
LMT84 CBP OUT
GND
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
LMT84
SNIS167E – MARCH 2013 – REVISED OCTOBER 2017
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Device Comparison Tables................................... 3 6 Pin Configuration and Functions ......................... 4 7 Specifications......................................................... 5
7.1 Absolute Maximum Ratings ...................................... 5 7.2 ESD Ratings.............................................................. 5 7.3 Recommended Operating Conditions....................... 5 7.4 Thermal Information .................................................. 5 7.5 Accuracy Characteristics........................................... 6 7.6 Electrical Characteristics........................................... 6 7.7 Typical Characteristics .............................................. 7 8 Detailed Description .............................................. 9 8.1 Overview ................................................................... 9 8.2 Functional Block Diagram ......................................... 9
8.3 Feature Description................................................... 9 8.4 Device Functional Modes........................................ 11 9 Application and Implementation ........................ 13 9.1 Applications Information.......................................... 13 9.2 Typical Applications ................................................ 13 10 Power Supply Recommendations ..................... 14 11 Layout................................................................... 15 11.1 Layout Guidelines ................................................. 15 11.2 Layout Examples................................................... 15 12 Device and Documentation Support ................. 16 12.1 Receiving Notification of Documentation Updates 16 12.2 Community Resources.......................................... 16 12.3 Trademarks ........................................................... 16 12.4 Electrostatic Discharge Caution ............................ 16 12.5 Glossary ................................................................ 16 13 Mechanical, Packaging, and Orderable Information ........................................................... 16
4 Revision History
.