Termometro, Codigo C

LM35 LM35A LM35C LM35CA LM35D Precision Centigrade Temperature Sensors

December 1994

LM35 LM35A LM35C LM35CA LM35D 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 temperaturesensors calibrated in Kelvin as the user is not required to subtract a large constant voltage from its output to obtain convenient Centigrade scaling The LM35 does not require any external calibration or trimming to provide typical accuracies of g C at room temperature and g C over a full b55 to a 150 C temperature range Low cost is assured by trimming and calibration at the wafer level The LM35’s lowoutput 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 mA 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 b55 to a 150 C temperature range while the LM35C is rated for ab40 to a 110 C range (b10 with improved 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-202 package

Features
Y Y Y Y Y Y Y Y Y Y Y

Calibrated directly in Celsius(Centigrade) Linear a 10 0 mV C scale factor 0 5 C accuracy guaranteeable (at a 25 C) Rated for full b55 to a 150 C range Suitable for remote applications Low cost due to wafer-level trimming Operates from 4 to 30 volts Less than 60 mA current drain Low self-heating 0 08 C in still air Nonlinearity only g C typical Low impedance output 0 1 X for 1 mA load

Connection Diagrams
TO-46 Metal Can PackageTO-92 Plastic Package SO-8 Small Outline Molded Package

TL H 5516 – 2 TL H 5516–1 TL H 5516 – 21

Case is connected to negative pin (GND)

Order Number LM35H LM35AH LM35CH LM35CAH or LM35DH See NS Package Number H03H TO-202 Plastic Package

Order Number LM35CZ LM35CAZ or LM35DZ See NS Package Number Z03A

Top View
N C e No Connection

Order Number LM35DM See NS Package Number M08ATypical Applications

TL H 5516 – 3

FIGURE 1 Basic Centigrade Temperature Sensor ( a 2 C to a 150 C)

TL H 5516 – 4

Choose R1 e b VS 50 mA VOUT e a 1 500 mV at a 150 C
e a 250 mV at a 25 C eb 550 mV at b 55 C

TL H 5516–24

Order Number LM35DP See NS Package Number P03A
TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National SemiconductorCorporation

FIGURE 2 Full-Range Centigrade Temperature Sensor

TL H 5516

RRD-B30M75 Printed in U S A

Absolute Maximum Ratings (Note 10)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage
a 35V to b 0 2V a 6V to b 1 0V Output Voltage Output Current 10 mA b 60 C to a 180 CStorage Temp TO-46 Package b 60 C to a 150 C TO-92 Package b 65 C to a 150 C SO-8 Package b 65 C to a 150 C TO-202 Package Lead Temp TO-46 Package (Soldering 10 seconds) 300 C TO-92 Package (Soldering 10 seconds) 260 C a 230 C TO-202 Package (Soldering 10 seconds)

SO Package (Note 12) Vapor Phase (60 seconds) 215 C Infrared (15 seconds) 220 C ESD Susceptibility (Note 11) 2500V Specified OperatingTemperature Range TMIN to TMAX (Note 2) b 55 C to a 150 C LM35 LM35A b 40 C to a 110 C LM35C LM35CA LM35D 0 C to a 100 C

Electrical Characteristics (Note 1) (Note 6)
LM35A Parameter Conditions Typical
g0 2 g0 3 g0 4 g0 4 g 0 18 g1 0 g1 0 g 0 35

LM35CA Design Limit (Note 5) Typical
g0 2 g0 3 g0 4 g0 4 g 0 15 g1 0 g1 5 g0 3

Tested Limit (Note 4)
g0 5

Tested Limit (Note 4)
g0 5...