LM35

LM35

Available: 5 Items
MMK: 1,500 Ks

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 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
±14˚C at room
temperature and
±34˚C over a full -55 to +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 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 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-220
package.


Features

Calibrated directly in ˚ Celsius (Centigrade)
Linear + 10.0 mV/˚C scale factor
0.5˚C accuracy guarantee-able (at +25˚C)
Rated for full -55˚ to +150˚C range
Suitable for remote applications
Low cost due to wafer-level trimming
Operates from 4 to 30 volts
Less than 60 µA current drain
Low self-heating, 0.08˚C in still air
Non linearity only ±14˚C typical
Low impedance output, 0.1 for 1 mA load