Temperature Sensor. LM35CA Datasheet

LM35CA Sensor. Datasheet pdf. Equivalent


Part LM35CA
Description Precision Centigrade Temperature Sensor
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LM35CA
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LM35
SNIS159H – AUGUST 1999 – REVISED DECEMBER 2017
LM35 Precision Centigrade Temperature Sensors
1 Features
1 Calibrated Directly in Celsius (Centigrade)
• Linear + 10-mV/°C Scale Factor
• 0.5°C Ensured Accuracy (at 25°C)
• Rated for Full 55°C to 150°C Range
• Suitable for Remote Applications
• Low-Cost Due to Wafer-Level Trimming
• Operates From 4 V to 30 V
• Less Than 60-μA Current Drain
• Low Self-Heating, 0.08°C in Still Air
• Non-Linearity Only ±¼°C Typical
• Low-Impedance Output, 0.1 Ω for 1-mA Load
2 Applications
• Power Supplies
• Battery Management
• HVAC
• Appliances
3 Description
The LM35 series are precision integrated-circuit
temperature devices with an output voltage linearly-
proportional to the Centigrade temperature. The
LM35 device has an advantage over linear
temperature sensors calibrated in Kelvin, as the user
is not required to subtract a large constant voltage
from the output to obtain convenient Centigrade
scaling. The LM35 device does not require any
external calibration or trimming to provide typical
accuracies of ±¼°C at room temperature and ±¾°C
over a full 55°C to 150°C temperature range. Lower
cost is assured by trimming and calibration at the
wafer level. The low-output impedance, linear output,
and precise inherent calibration of the LM35 device
makes interfacing to readout or control circuitry
especially easy. The device is used with single power
supplies, or with plus and minus supplies. As the
LM35 device draws only 60 μA from the supply, it has
very low self-heating of less than 0.1°C in still air. The
LM35 device is rated to operate over a 55°C to
150°C temperature range, while the LM35C device is
rated for a 40°C to 110°C range (10° with
improved accuracy). The LM35-series devices are
available packaged in hermetic TO transistor
packages, while the LM35C, LM35CA, and LM35D
devices are available in the plastic TO-92 transistor
package. The LM35D device is available in an 8-lead
surface-mount small-outline package and a plastic
TO-220 package.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TO-CAN (3)
4.699 mm × 4.699 mm
LM35
TO-92 (3)
SOIC (8)
4.30 mm × 4.30 mm
4.90 mm × 3.91 mm
TO-220 (3)
14.986 mm × 10.16 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Basic Centigrade Temperature Sensor
(2°C to 150°C)
+VS
(4 V to 20 V)
LM35
OUTPUT
0 mV + 10.0 mV/°C
Full-Range Centigrade Temperature Sensor
+VS
LM35
VOUT
R1
tVS
Choose R1 = –VS / 50 µA
VOUT = 1500 mV at 150°C
VOUT = 250 mV at 25°C
VOUT = –550 mV at –55°C
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.



LM35CA
LM35
SNIS159H – AUGUST 1999 – REVISED DECEMBER 2017
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: LM35A, LM35CA Limits... 5
6.6 Electrical Characteristics: LM35A, LM35CA ............. 6
6.7 Electrical Characteristics: LM35, LM35C, LM35D
Limits.......................................................................... 8
6.8 Electrical Characteristics: LM35, LM35C, LM35D ... 9
6.9 Typical Characteristics ............................................ 11
7 Detailed Description ............................................ 13
7.1 Overview ................................................................. 13
7.2 Functional Block Diagram ....................................... 13
7.3 Feature Description................................................. 13
7.4 Device Functional Modes........................................ 13
8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14
8.2 Typical Application .................................................. 15
8.3 System Examples ................................................... 16
9 Power Supply Recommendations...................... 19
10 Layout................................................................... 19
10.1 Layout Guidelines ................................................. 19
10.2 Layout Example .................................................... 20
11 Device and Documentation Support ................. 21
11.1 Receiving Notification of Documentation Updates 21
11.2 Community Resources.......................................... 21
11.3 Trademarks ........................................................... 21
11.4 Electrostatic Discharge Caution ............................ 21
11.5 Glossary ................................................................ 21
12 Mechanical, Packaging, and Orderable
Information ........................................................... 21
4 Revision History
Changes from Revision G (August 2016) to Revision H
Page
• Changed NDV Package (TO-CAN) pinout from bottom view back to top view; added textnote to pinout............................. 3
• Added pin numbers to the TO-CAN (TO46) pinout ................................................................................................................ 3
Changes from Revision F (January 2016) to Revision G
Page
Equation 1, changed From: 10 mV/°F To: 10mv/°C ............................................................................................................ 13
Power Supply Recommendations, changed From: "4-V to 5.5-V power supply" To: "4-V to 30-V power supply: .............. 19
Changes from Revision E (January 2015) to Revision F
Page
• Changed NDV Package (TO-CAN) pinout from Top View to Bottom View ........................................................................... 3
Changes from Revision D (October 2013) to Revision E
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
Changes from Revision C (July 2013) to Revision D
Page
• Changed W to Ω .................................................................................................................................................................... 1
• Changed W to Ω in Abs Max tablenote. ................................................................................................................................ 4
2
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