Lm335

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 temperature sensors calibrated in
Kelvin as the user is not required to subtract a large constantvoltage 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 low output impedance linear output and precise inherent calibration make
interfacing toreadout 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 a b40 to a 110 C
range (b10 with improved accuracy) The LM35 series isavailable 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 accuracyguaranteeable (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-92
Plastic Package

TO-46
Metal Can Package

SO-8
Small OutlineMolded Package

TL H 5516 – 2
TL H 5516–1

Case is connected to negative pin (GND)

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

TL H 5516 – 21

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 M08A

Typical Applications

TL H5516 – 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

FIGURE 2 Full-Range Centigrade
Temperature Sensor

TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995National Semiconductor Corporation

TL H 5516

RRD-B30M75 Printed in U S A

LM35 LM35A LM35C LM35CA LM35D
Precision Centigrade Temperature Sensors

December 1994

Absolute Maximum Ratings (Note 10)
SO Package (Note 12)

If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
SupplyVoltage

Vapor Phase (60 seconds)

215 C

Infrared (15 seconds)
220 C
ESD Susceptibility (Note 11)
2500V
Specified Operating Temperature 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

a 35V to b 0 2V

a 6V to b 1 0V
Output Voltage
Output Current
10 mA
b 60 C to a 180 C
Storage Temp TO-46 Package
b 60 C to a150 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)

Electrical Characteristics (Note 1) (Note 6)
LM35A
Parameter

Accuracy
(Note 7)

Conditions

TA e a 25 C
TA eb10 C
TA e TMAX
TA e TMIN

Typical...