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LM50-Q1 Datasheet Preview

LM50-Q1 Datasheet

Temperature Sensor

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LM50, LM50-Q1
SNIS118G – JULY 1999 – REVISED JANUARY 2017
LM50 and LM50-Q1 SOT-23 Single-Supply Centigrade Temperature Sensor
1 Features
1 LM50-Q1 is AEC-Q100 Grade 1 Qualified and is
Manufactured on an Automotive Grade Flow
• Calibrated Directly in Degrees Celsius
(Centigrade)
• Linear + 10 mV/°C Scale Factor
• ±2°C Accuracy Specified at 25°C
• Specified for Full –40° to 125°C Range
• Suitable for Remote Applications
• Low Cost Due to Wafer-Level Trimming
• Operates From 4.5 V to 10 V
• Less Than 130-µA Current Drain
• Low Self-Heating: Less Than 0.2°C in Still A
• Nonlinearity Less Than 0.8°C Over Temp
• UL Recognized Component
2 Applications
• Automotive
• Computers
• Disk Drives
• Battery Management
• FAX Machines
• Printers
• Portable Medical Instruments
• HVAC
• Power Supply Modules
SPACER
Simplified Schematic
+VS
(4.5 V to 10 V)
LM50
LM50-Q1
Output
Copyright © 2016, Texas Instruments Incorporated
3 Description
The LM50 and LM50-Q1 devices are precision
integrated-circuit temperature sensors that can sense
a –40°C to 125°C temperature range using a single
positive supply. The output voltage of the device is
linearly proportional to temperature (10 mV/°C) and
has a DC offset of 500 mV. The offset allows reading
negative temperatures without the need for a
negative supply.
The ideal output voltage of the LM50 or LM50-Q1
ranges from 100 mV to 1.75 V for a –40°C to 125°C
temperature range. The LM50 and LM50-Q1 do not
require any external calibration or trimming to provide
accuracies of ±3°C at room temperature and ±4°C
over the full –40°C to 125°C temperature range.
Trimming and calibration of the LM50 and LM50-Q1
at the wafer level assure low cost and high accuracy.
The linear output, 500 mV offset, and factory
calibration of the LM50 and LM50-Q1 simplify the
circuitry requirements in a single supply environment
where reading negative temperatures is necessary.
Because the quiescent current of the LM50 and
LM50-Q1 is less than 130 µA, self-heating is limited
to a very low 0.2°C in still air.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LM50, LM50-Q1
SOT-23 (3)
2.92 mm × 1.30 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Full-Range Centigrade Temperature Sensor
(–40°C to 125°C)
2.00
1.75
1.50
1.25
1.00
0.750
1.750
0.75
0.50
0.25
0.100
VO = (+10 mV/°C × T °C) + 500 mV
0.00
±50 ±25
0 25 50 75 100 125 150
DUT Temperature (ƒC)
C001
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.




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LM50-Q1 Datasheet Preview

LM50-Q1 Datasheet

Temperature Sensor

No Preview Available !

LM50, LM50-Q1
SNIS118G – JULY 1999 – REVISED JANUARY 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......................................................... 3
6.1 Absolute Maximum Ratings ...................................... 3
6.2 ESD Ratings.............................................................. 3
6.3 Recommended Operating Conditions....................... 4
6.4 Thermal Information .................................................. 4
6.5 Electrical Characteristics: LM50B ............................. 4
6.6 Electrical Characteristics: LM50C and LM50-Q1 ...... 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.......................................... 8
8 Application and Implementation .......................... 9
8.1 Application Information.............................................. 9
8.2 Typical Application .................................................... 9
8.3 System Examples ................................................... 11
9 Power Supply Recommendations...................... 12
10 Layout................................................................... 12
10.1 Layout Guidelines ................................................. 12
10.2 Layout Example .................................................... 12
10.3 Thermal Considerations ........................................ 13
11 Device and Documentation Support ................. 14
11.1 Related Links ........................................................ 14
11.2 Receiving Notification of Documentation Updates 14
11.3 Community Resources.......................................... 14
11.4 Trademarks ........................................................... 14
11.5 Electrostatic Discharge Caution ............................ 14
11.6 Glossary ................................................................ 14
12 Mechanical, Packaging, and Orderable
Information ........................................................... 14
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision F (December 2016) to Revision G
Page
• Changed LMT90 to LM50 in VO description of Equation 1 .................................................................................................... 8
Changes from Revision E (September 2013) to Revision F
Page
• Added Device Information table, Pin Configuration and Functions section, ESD Ratings table, Detailed Description
section, Application and Implementation section, Power Supply Recommendations section, Layout section, Device
and Documentation Support section, and Mechanical, Packaging, and Orderable Information section ............................... 1
• Added Thermal Information table ........................................................................................................................................... 4
• Changed Junction-to-ambient, RθJA, value in Thermal Information table From: 450°C/W To: 291.9°C/W ............................ 4
• Deleted the Temperature To Digital Converter (Parallel TRI-STATE Outputs for Standard Data Bus to µP Interface)
(125°C Full Scale) figure ...................................................................................................................................................... 11
Changes from Revision C (February 2013) to Revision E
Page
• Added LM50-Q1 option throughout document ....................................................................................................................... 1
2 Submit Documentation Feedback
Copyright © 1999–2017, Texas Instruments Incorporated
Product Folder Links: LM50 LM50-Q1


Part Number LM50-Q1
Description Temperature Sensor
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