LMT90_15 Datasheet, PDF (1/18 Pages) Texas Instruments – LMT90 SOT-23 Single-Supply Centigrade Temperature Sensor

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LMT90
SNIS177B – MARCH 2013 – REVISED SEPTEMBER 2015
LMT90 SOT-23 Single-Supply Centigrade Temperature Sensor
1 Features
•1 Cost-Effective Alternative to Thermistors
• Calibrated Directly in Degree Celsius (Centigrade)
• Linear + 10.0 mV/°C Scale Factor
• ±3°C Accuracy Guaranteed at 25°C
• Specified for Full −40° to 125°C range
• Suitable for Remote Applications
• Operates from 4.5 V to 10 V
• Less than 130-μA Current Drain
• Low Self-heating, Less Than 0.2°C in Still Air
• Non-linearity Less Than 0.8°C Over Temp
2 Applications
• Industrial
• HVAC
• Disk Drives
• Automotive
• Portable Medical Instruments
• Computers
• Battery Management
• Printers
• Power Supply Modules
• FAX Machines
3 Description
The LMT90 device is a precision integrated-circuit
temperature sensor that can sense a −40°C to
+125°C temperature range using a single positive
supply. The output voltage of LMT90 is linearly
proportional to Celsius (Centigrade) 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 LMT90 ranges from 100 mV to 1.75 V for a
−40°C to 125°C temperature range. The LMT90 does
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 LMT90 at the
wafer level assure low cost and high accuracy. The
linear output, 500-mV offset, and factory calibration of
LMT90 simplify circuitry required in a single-supply
environment where reading negative temperatures is
required. The LMT90's quiescent current is less than
130 μA, thus self-heating is limited to a very low
0.2°C in still air.
The LMT90 is a cost-competitive alternative to
thermistors.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
LMT90
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.
Simplified Schematic
+V_S
(4.5 V to 10 V)
LMT90
Output
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 _0.100
0.25
V_O = (+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.