LM135A Sensors Datasheet

LM135A Datasheet PDF, Equivalent


Part Number

LM135A

Description

Precision Temperature Sensors

Manufacture

etcTI

Total Page 30 Pages
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LM135A
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LM135, LM135A, LM235, LM235A, LM335, LM335A
SNIS160E – MAY 1999 – REVISED FEBRUARY 2015
LMx35, LMx35A Precision Temperature Sensors
1 Features
1 Directly Calibrated to the Kelvin Temperature
Scale
• 1°C Initial Accuracy Available
• Operates from 400 μA to 5 mA
• Less than 1-Ω Dynamic Impedance
• Easily Calibrated
• Wide Operating Temperature Range
• 200°C Overrange
• Low Cost
2 Applications
• Power Supplies
• Battery Management
• HVAC
• Appliances
3 Description
The LM135 series are precision, easily-calibrated,
integrated circuit temperature sensors. Operating as
a 2-terminal zener, the LM135 has a breakdown
voltage directly proportional to absolute temperature
at 10 mV/°K. With less than 1-Ω dynamic impedance,
the device operates over a current range of 400 μA to
5 mA with virtually no change in performance. When
calibrated at 25°C, the LM135 has typically less than
1°C error over a 100°C temperature range. Unlike
other sensors, the LM135 has a linear output.
Applications for the LM135 include almost any type of
temperature sensing over a 55°C to 150°C
temperature range. The low impedance and linear
output make interfacing to readout or control circuitry
are especially easy.
The LM135 operates over a 55°C to 150°C
temperature range while the LM235 operates over a
40°C to 125°C temperature range. The LM335
operates from 40°C to 100°C. The LMx35 devices
are available packaged in hermetic TO transistor
packages while the LM335 is also available in plastic
TO-92 packages.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM135
LM135A
TO-46 (3)
4.699 mm × 4.699 mm
LM235
LM235A
TO-92 (3)
4.30 mm × 4.30 mm
LM335
LM335A
SOIC (8)
4.90 mm × 3.91 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Basic Temperature Sensor Simplified Schematic
Calibrated Sensor
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.

LM135A
LM135, LM135A, LM235, LM235A, LM335, LM335A
SNIS160E – MAY 1999 – REVISED FEBRUARY 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 Recommended Operating Conditions....................... 4
6.3 Thermal Information .................................................. 4
6.4 Temperature Accuracy: LM135/LM235,
LM135A/LM235A ....................................................... 4
6.5 Temperature Accuracy: LM335, LM335A(1).............. 5
6.6 Electrical Characteristics........................................... 5
6.7 Typical Characteristics .............................................. 6
7 Detailed Description .............................................. 8
7.1 Overview ................................................................... 8
7.2 Functional Block Diagram ......................................... 8
7.3 Feature Description................................................... 8
7.4 Device Functional Modes.......................................... 9
8 Application and Implementation ........................ 10
8.1 Application Information............................................ 10
8.2 Typical Application .................................................. 10
8.3 System Examples ................................................... 11
9 Power Supply Recommendations...................... 16
10 Layout................................................................... 16
10.1 Layout Guidelines ................................................. 16
10.2 Layout Example .................................................... 16
10.3 Waterproofing Sensors ......................................... 17
10.4 Mounting the Sensor at the End of a Cable.......... 17
11 Device and Documentation Support ................. 18
11.1 Device Support...................................................... 18
11.2 Related Links ........................................................ 18
11.3 Trademarks ........................................................... 18
11.4 Electrostatic Discharge Caution ............................ 18
11.5 Glossary ................................................................ 18
12 Mechanical, Packaging, and Orderable
Information ........................................................... 18
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision D (March 2013) to Revision E
Page
• Added Pin Configuration and Functions section, 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
Changes from Revision C (November 2012) to Revision D
Page
• Changed layout of National Data Sheet to TI format ........................................................................................................... 18
2 Submit Documentation Feedback
Copyright © 1999–2015, Texas Instruments Incorporated
Product Folder Links: LM135 LM135A LM235 LM235A LM335 LM335A


Features Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM135, LM135A, LM235, LM235A , LM335, LM335A SNIS160E – MAY 1999 REVISED FEBRUARY 2015 LMx35, LMx35A Precision Temperature Sensors 1 Featur es •1 Directly Calibrated to the Kelv in Temperature Scale • 1°C Initial A ccuracy Available • Operates from 400 μA to 5 mA • Less than 1-Ω Dynamic Impedance • Easily Calibrated • Wi de Operating Temperature Range • 200 C Overrange • Low Cost 2 Application s • Power Supplies • Battery Manage ment • HVAC • Appliances 3 Descrip tion The LM135 series are precision, ea sily-calibrated, integrated circuit tem perature sensors. Operating as a 2-term inal zener, the LM135 has a breakdown v oltage directly proportional to absolut e temperature at 10 mV/°K. With less t han 1-Ω dynamic impedance, the device operates over a current range of 400 μ A to 5 mA with virtually no change in p erformance. When calibrated at 25°C, the LM135 has typically less than 1°C error over a 100°C temp.
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