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LM45 Datasheet Preview

LM45 Datasheet

Precision Centigrade Temperature Sensor

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LM45
www.ti.com
SNIS117C – AUGUST 1999 – REVISED FEBRUARY 2013
LM45 SOT-23 Precision Centigrade Temperature Sensors
Check for Samples: LM45
FEATURES
1
2 Calibrated Directly in ° Celsius (Centigrade)
• Linear + 10.0 mV/°C Scale Factor
• ±3°C Accuracy Guaranteed
• Rated for Full 20° to +100°C Range
• Suitable for Remote Applications
• Low Cost Due to Wafer-Llevel Trimming
• Operates from 4.0V to 10V
• Less than 120 μA Current Drain
• Low Self-Heating, 0.20°C in Still Air
• Nonlinearity Only ±0.8°C Max Over Temp
• Low Impedance Output, 20Ω for 1 mA Load
APPLICATIONS
• Battery Management
• FAX Machines
• Printers
• Portable Medical Instruments
• HVAC
• Power Supply Modules
• Disk Drives
• Computers
• Automotive
DESCRIPTION
The LM45 series are precision integrated-circuit
temperature sensors, whose output voltage is linearly
proportional to the Celsius (Centigrade) temperature.
The LM45 does not require any external calibration or
trimming to provide accuracies of ±2°C at room
temperature and ±3°C over a full 20 to +100°C
temperature range. Low cost is assured by trimming
and calibration at the wafer level. The LM45's low
output impedance, linear output, and precise inherent
calibration make interfacing to readout or control
circuitry especially easy. It can be used with a single
power supply, or with plus and minus supplies. As it
draws only 120 μA from its supply, it has very low
self-heating, less than 0.2°C in still air. The LM45 is
rated to operate over a 20° to +100°C temperature
range.
Connection Diagram
Figure 1. SOT-23
Top View
Package Number DBZ0003A
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.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1999–2013, Texas Instruments Incorporated




etcTI

LM45 Datasheet Preview

LM45 Datasheet

Precision Centigrade Temperature Sensor

No Preview Available !

LM45
SNIS117C – AUGUST 1999 – REVISED FEBRUARY 2013
Typical Applications
www.ti.com
Figure 2. Basic Centigrade Temperature Sensor (+2.5°C to +100°C)
Choose R1 = VS/50 μA
VOUT = (10 mV/°C × Temp °C)
VOUT = +1,000 mV at +100°C
= +250 mV at +25°C
= 200 mV at 20°C
Figure 3. Full-Range Centigrade Temperature Sensor (20°C to +100°C)
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)
Supply Voltage
Output Voltage
Output Current
Storage Temperature
ESD Susceptibility(2)
Human Body Model
Machine Model
+12V to 0.2V
+V S + 0.6V to 1.0V
10 mA
65°C to +150°C
2000V
250V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) Human body model, 100 pF discharged through a 1.5 kΩ resistor. Machine model, 200 pF discharged directly into each pin.
Operating Ratings(1)(2)(3)
Specified Temperature Range(4)
LM45B, LM45C
Operating Temperature Range
LM45B, LM45C
Supply Voltage Range (+VS)
TMIN to TMAX
20°C to +100°C
40°C to +125°C
+4.0V to +10V
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not
apply when operating the device beyond its rated operating conditions.
(2) Soldering process must comply with Reflow Temperature Profile specifications. Refer to http://www.ti.com/packaging.
(3) Reflow temperature profiles are different for lead-free and non-lead-free packages.
(4) Thermal resistance of the SOT-23 package is 260°C/W, junction to ambient when attached to a printed circuit board with 2 oz. foil as
shown in Figure 15.
2
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Product Folder Links: LM45
Copyright © 1999–2013, Texas Instruments Incorporated


Part Number LM45
Description Precision Centigrade Temperature Sensor
Maker etcTI
Total Page 3 Pages
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