Temperature Sensors. LMT85 Datasheet

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LMT85 Datasheet
Recommendation LMT85 Datasheet
Part LMT85
Description Analog Temperature Sensors
Feature LMT85; Product Folder Order Now Technical Documents Tools & Software Support & Community LMT85 SNIS168.
Manufacture etcTI
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Texas Instruments LMT85
Product
Folder
Order
Now
Technical
Documents
Tools &
Software
Support &
Community
LMT85
SNIS168E – MARCH 2013 – REVISED OCTOBER 2017
LMT85 1.8-V, SC70/TO-92/TO-92S,
Analog Temperature Sensors
1 Features
1 LMT85LPG (TO-92S package) has a Fast
Thermal Time Constant, 10-s Typical (1.2 m/s
Airflow)
• Very Accurate: ±0.4°C Typical
• Low 1.8-V Operation
• Average Sensor Gain of -8.2 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
• Automotive
• Infotainment and Cluster
• Powertrain Systems
• Smoke and Heat Detectors
• Drones
• Appliances
3 Description
The LMT85 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 1.8-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 LMT85LPG through-hole TO-92S
package fast thermal time constant supports off-
board time-temperature sensitive applications such
as smoke and heat detectors. The accuracy over the
wide operating range and other features make the
LMT85 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 × 1.25 mm
LMT85
TO-92 (3)
4.30 mm × 3.50 mm
TO-92S (3)
4.00 mm × 3.15 mm
(1) For all available packages, see the orderable addendum
addendum at the end of the data sheet.
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 (+1.8V to +5.5V)
VDD
LMT85
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.



Texas Instruments LMT85
LMT85
SNIS168E – 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 Application Information............................................ 13
9.2 Typical Applications ................................................ 13
10 Power Supply Recommendations ..................... 14
11 Layout................................................................... 15
11.1 Layout Guidelines ................................................. 15
11.2 Layout Example .................................................... 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
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (June 2017) to Revision E
Page
• Moved the automotive device to a standalone data sheet (SNIS200) .................................................................................. 1
• Changed TO-92 GND pin number from: 1 to: 3 .................................................................................................................... 4
• Changed TO-92 VDD pin number from: 3 to: 1 ...................................................................................................................... 4
Changes from Revision C (October 2015) to Revision D
Page
• Updated data sheet text to the latest documentation and translations standards ................................................................. 1
• Added AEC-Q100 automotive qualification bullets to Features ............................................................................................. 1
• Added Time Constant graph................................................................................................................................................... 1
• Removed disk drivers, games, wireless transceivers, and cell phones from Applications..................................................... 1
• Added LPG (TO-92S) package .............................................................................................................................................. 4
• Added Figure 10 to Typical Characteristics............................................................................................................................ 7
Changes from Revision B (May 2014) to Revision C
Page
• Deleted all mentions of TO-126 package .............................................................................................................................. 1
• Added TO-92 LPM pin configuration graphic ......................................................................................................................... 4
• Changed Handling Ratings to ESD Ratings and moved Storage Temperature to Absolute Maximum Ratings table........... 5
• Changed KV to V ................................................................................................................................................................... 5
• Added TO-92 LP and LPM layout recommendations........................................................................................................... 15
Changes from Revision A (June 2013) to Revision B
Page
• Changed data sheet flow and layout to conform with new TI standards. Added the following sections: Application
and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, Mechanical,
Packaging, and Orderable Information. ................................................................................................................................. 1
• Added TO-92 and TO-126 package information throughout document. ................................................................................ 1
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Copyright © 2013–2017, Texas Instruments Incorporated



Texas Instruments LMT85
www.ti.com
LMT85
SNIS168E – MARCH 2013 – REVISED OCTOBER 2017
• Changed from 450°C/W to 275 °C/W. New specification is derived using TI ' s latest methodology. .................................. 5
• Changed Temperature Accuracy Conditions from 70°C to 20°C and VDD from 1.9V to 1.8V................................................ 6
• Deleted Note: The input current is leakage only and is highest at high temperature. It is typically only 0.001 µA. The
1 µA limit is solely based on a testing limitation and does not reflect the actual performance of the part............................. 6
5 Device Comparison Tables
ORDER NUMBER(1)
LMT85DCK
LMT85LP
LMT85LPG
LMT85LPM
LMT85DCK-Q1
Table 1. Available Device Packages
PACKAGE
SOT (AKA(2): SC70, DCK)
TO-92 (AKA(2): LP)
TO-92S (AKA(2): LPG)
TO-92 (AKA(2): LPM)
SOT (AKA(2): SC70, DCK)
PIN BODY SIZE (NOM)
5 2.00 mm × 1.25 mm
3 4.30 mm × 3.50 mm
3 4.00 mm × 3.15 mm
3 4.30 mm × 3.50 mm
5 2.00 mm × 1.25 mm
MOUNTING TYPE
Surface Mount
Through-hole; straight leads
Through-hole; straight leads
Through-hole; formed leads
Surface Mount
(1) For all available packages and complete order numbers, see the Package Option addendum at the end of the data sheet.
(2) AKA = Also Known As
DEVICE NAME
LMT84
LMT85
LMT86
LMT87
Table 2. Comparable Alternative Devices
AVERAGE OUTPUT SENSOR GAIN
–5.5 mV/°C
–8.2 mV/°C
–10.9 mV/°C
–13.6 mV/°C
POWER SUPPLY RANGE
1.5 V to 5.5 V
1.8 V to 5.5 V
2.2 V to 5.5 V
2.7 V to 5.5 V
Copyright © 2013–2017, Texas Instruments Incorporated
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