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LMT90 Datasheet(PDF) 1 Page - Texas Instruments

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Part No. LMT90
Description  LMT90 SOT-23 Single-Supply Centigrade Temperature Sensor
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

LMT90 Datasheet(HTML) 1 Page - Texas Instruments

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LMT90
+VS
(4.5 V to 10 V)
Output
VOUT = (10 mV/°C K Temp °C) + 500 mV
VOUT = +1.750 V at +125°C
VOUT = +750 mV at +25°C
VOUT = +100 mV at -40°C
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LMT90
www.ti.com
SNIS177A – MARCH 2013 – REVISED AUGUST 2013
LMT90 SOT-23 Single-Supply Centigrade Temperature Sensor
1
FEATURES
DESCRIPTION
The
LMT90
is
a
precision
integrated-circuit
2
Cost-Effective Alternative to Thermistors
temperature sensor that can sense a
−40°C to
Calibrated Directly in Degree Celsius
+125°C temperature range using a single positive
(Centigrade)
supply. The LMT90's output voltage is linearly
Linear + 10.0 mV/°C Scale Factor
proportional to Celsius (Centigrade) temperature (+10
mV/°C) and has a DC offset of +500 mV. The offset
±3°C Accuracy Guaranteed at +25°C
allows reading negative temperatures without the
Specified for Full
−40° to +125°C range
need for a negative supply. The ideal output voltage
Suitable for Remote Applications
of the LMT90 ranges from +100 mV to +1.75V for a
−40°C to +125°C temperature range. The LMT90
Low Cost Due to Wafer-level Trimming
does not require any external calibration or trimming
Operates from 4.5V to 10V
to provide accuracies of ±3°C at room temperature
Less than 130
μA Current Drain
and ±4°C over the full
−40°C to +125°C temperature
range. Trimming and calibration of the LMT90 at the
Low Self-heating, Less than 0.2°C in Still Air
wafer level assure low cost and high accuracy. The
Nonlinearity Less than 0.8°C Over Temp
LMT90's linear output, +500 mV offset, and factory
calibration simplify circuitry required in a single supply
APPLICATIONS
environment where reading negative temperatures is
required. The LMT90's quiescent current is less than
Industrial
130
μA, thus self-heating is limited to a very low
HVAC
0.2°C in still air.
Disk Drives
The LMT90 is a cost-competitive alternative to
Automotive
thermistors.
Portable Medical Instruments
Computers
CONNECTION DIAGRAM
Battery Management
Printers
Power Supply Modules
FAX Machines
Figure 1. SOT-23 Top View
TYPICAL APPLICATION
Figure 2. Full-Range Centigrade Temperature
Sensor (
−40°C to +125°C)
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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