Temperature Sensors. LMT89 Datasheet

LMT89 Sensors. Datasheet pdf. Equivalent

Part LMT89
Description Temperature Sensors
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LMT89
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LMT89
SNIS176A – MARCH 2013 – REVISED JANUARY 2015
LMT89 2.4-V, 10-µA, SC70 Temperature Sensor
1 Features
1 Cost-Effective Alternative to Thermistors
• Rated for full 55°C to 130°C Range
• Available in an SC70 Package
• Predictable Curvature Error
• Suitable for Remote Applications
2 Applications
• Industrial
• HVAC
• Automotive
• Disk Drives
• Portable Medical Instruments
• Computers
• Battery Management
• Printers
• Power Supply Modules
• FAX Machines
• Mobile Phones
• Automotive
3 Description
The LMT89 device is a precision analog output
CMOS integrated-circuit temperature sensor that
operates over a 55°C to 130°C temperature range.
The power supply operating range is 2.4 V to 5.5 V.
The transfer function of LMT89 device is
predominately linear, yet has a slight predictable
parabolic curvature. The accuracy of the LMT89
device, when specified to a parabolic transfer
function, is typically ±1.5°C at an ambient
temperature of 30°C. The temperature error
increases linearly and reaches a maximum of ±2.5°C
at the temperature range extremes. The temperature
range is affected by the power supply voltage. At a
power supply voltage of 2.7 V to 5.5 V, the
temperature range extremes are 130°C and 55°C.
Decreasing the power supply voltage to 2.4 V
changes the negative extreme to 30°C, while the
positive remains at 130°C.
The quiescent current of the LMT89 device is less
than 10 μA. Therefore, self-heating is less than
0.02°C in still air. Shutdown capability for the LMT89
device is intrinsic because its inherent low power
consumption allows it to be powered directly from the
output of many logic gates or does not necessitate
shutdown at all.
The LMT89 device is a cost-competitive alternative to
thermistors.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMT89
SOT (5)
2.00 mm × 1.25 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Simplified Schematic
+2.4V to +5.5V
Output Voltage vs Temperature
V+ VO
LMT89
To MCU ADC
GND NC
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.



LMT89
LMT89
SNIS176A – MARCH 2013 – REVISED JANUARY 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Revision History..................................................... 2
5 Pin Configuration and Functions ......................... 3
6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4
6.2 ESD Ratings.............................................................. 4
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics........................................... 5
6.6 Typical Characteristics ............................................. 5
7 Detailed Description .............................................. 6
7.1 Overview ................................................................... 6
7.2 Functional Block Diagram ......................................... 6
7.3 Feature Description................................................... 6
7.4 Device Functional Modes.......................................... 7
8 Application and Implementation .......................... 8
8.1 Application Information.............................................. 8
8.2 Typical Applications .................................................. 9
8.3 System Examples ................................................... 11
9 Power Supply Recommendations...................... 12
10 Layout................................................................... 12
10.1 Layout Guidelines ................................................. 12
10.2 Layout Example .................................................... 13
11 Device and Documentation Support ................. 14
11.1 Trademarks ........................................................... 14
11.2 Electrostatic Discharge Caution ............................ 14
11.3 Glossary ................................................................ 14
12 Mechanical, Packaging, and Orderable
Information ........................................................... 14
4 Revision History
Changes from Original (March 2013) to Revision A
Page
• Added Pin Configuration and Functions section, ESD Ratings table, Feature Description section, Device Functional
Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ............................... 1
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