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What is LM35DZ?

This electronic component, produced by the manufacturer "National Semiconductor", performs the same function as "Precision Centigrade Temperature Sensors".


LM35DZ Datasheet PDF - National Semiconductor

Part Number LM35DZ
Description Precision Centigrade Temperature Sensors
Manufacturers National Semiconductor 
Logo National Semiconductor Logo 


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July 1999
LM35
Precision Centigrade Temperature Sensors
General Description
The LM35 series are precision integrated-circuit temperature
sensors, whose output voltage is linearly proportional to the
Celsius (Centigrade) temperature. The LM35 thus has an
advantage over linear temperature sensors calibrated in
˚ Kelvin, as the user is not required to subtract a large con-
stant voltage from its output to obtain convenient Centigrade
scaling. The LM35 does not require any external calibration
or trimming to provide typical accuracies of ±14˚C at room
temperature and ±34˚C over a full −55 to +150˚C tempera-
ture range. Low cost is assured by trimming and calibration
at the wafer level. The LM35’s low output impedance, linear
output, and precise inherent calibration make interfacing to
readout or control circuitry especially easy. It can be used
with single power supplies, or with plus and minus supplies.
As it draws only 60 µA from its supply, it has very low
self-heating, less than 0.1˚C in still air. The LM35 is rated to
operate over a −55˚ to +150˚C temperature range, while the
LM35C is rated for a −40˚ to +110˚C range (−10˚ with im-
proved accuracy). The LM35 series is available packaged in
hermetic TO-46 transistor packages, while the LM35C,
LM35CA, and LM35D are also available in the plastic TO-92
transistor package. The LM35D is also available in an 8-lead
surface mount small outline package and a plastic TO-220
package.
Features
n Calibrated directly in ˚ Celsius (Centigrade)
n Linear + 10.0 mV/˚C scale factor
n 0.5˚C accuracy guaranteeable (at +25˚C)
n Rated for full −55˚ to +150˚C range
n Suitable for remote applications
n Low cost due to wafer-level trimming
n Operates from 4 to 30 volts
n Less than 60 µA current drain
n Low self-heating, 0.08˚C in still air
n Nonlinearity only ±14˚C typical
n Low impedance output, 0.1 for 1 mA load
Typical Applications
DS005516-3
FIGURE 1. Basic Centigrade Temperature Sensor
(+2˚C to +150˚C)
DS005516-4
Choose R1 = −VS/50 µA
V OUT=+1,500 mV at +150˚C
= +250 mV at +25˚C
= −550 mV at −55˚C
FIGURE 2. Full-Range Centigrade Temperature Sensor
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS005516
www.national.com

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LM35DZ equivalent
Typical Performance Characteristics
Thermal Resistance
Junction to Air
Thermal Time Constant
Thermal Response
in Still Air
DS005516-25
Thermal Response in
Stirred Oil Bath
DS005516-26
Minimum Supply
Voltage vs. Temperature
DS005516-27
Quiescent Current
vs. Temperature
(In Circuit of Figure 1.)
DS005516-28
Quiescent Current
vs. Temperature
(In Circuit of Figure 2.)
DS005516-29
Accuracy vs. Temperature
(Guaranteed)
DS005516-30
Accuracy vs. Temperature
(Guaranteed)
DS005516-31
DS005516-32
DS005516-33
5 www.national.com


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1. - Temperature Sensor - National

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