Image LM35
型号: LM35
厂商: Texas Instruments Texas Instruments
标准:
分类: 半导体
描述: precision centigrade temperature sensor 3-TO -55 to 150
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LM35的详细信息

Operating Temperature Range(C) : -40 to 110,-55 to 150,0 to 100,0 to 70
Shutdown : No
Supply Voltage(Min)(V) : 4
Local Sensor Accuracy(Max)(+/- C) : 0.5
Temp Range for Listed Accuracy(C) : -55 to 150
Estimated Footprint(mm<:
sup>:
2<:
/sup>:
) : [pf]3TO-92[/pf]
Package Group : SOIC,TO,TO-220,TO-92
Interface : Analog
Rating : Military
Supply Voltage(Max)(V) : 30
Output Impedance(Ohm) : 0.4
Sensor Gain(mV/Deg C) : 10
SNIS159D AUGUST 1999REVISED OCTOBER 2013  
LM35 Precision Centigrade Temperature Sensors  
1
FEATURES  
DESCRIPTION  
The LM35 series are precision integrated-circuit  
2
Calibrated Directly in ° Celsius (Centigrade)  
Linear + 10 mV/°C Scale Factor  
temperature sensors, with an output voltage linearly  
proportional to the Centigrade temperature. Thus the  
LM35 has an advantage over linear temperature  
sensors calibrated in ° Kelvin, as the user is not  
required to subtract a large constant voltage from the  
output to obtain convenient Centigrade scaling. The  
LM35 does not require any external calibration or  
trimming to provide typical accuracies of ±¼°C at  
room temperature and ±¾°C over a full 55°C to  
+150°C temperature range. Low cost is assured by  
trimming and calibration at the wafer level. The low  
output impedance, linear output, and precise inherent  
calibration of the LM35 make interfacing to readout or  
control circuitry especially easy. The device is used  
with single power supplies, or with plus and minus  
supplies. As the LM35 draws only 60 μA from the  
supply, it has very low self-heating of less than 0.1°C  
in still air. The LM35 is rated to operate over a 55°C  
to +150°C temperature range, while the LM35C is  
rated for a 40°C to +110°C range (10° with  
improved accuracy). The LM35 series is available  
packaged in hermetic TO 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.  
0.5°C Ensured Accuracy (at +25°C)  
Rated for Full 55°C to +150°C Range  
Suitable for Remote Applications  
Low Cost Due to Wafer-Level Trimming  
Operates from 4 to 30 V  
Less than 60-μA Current Drain  
Low Self-Heating, 0.08°C in Still Air  
Nonlinearity Only ±¼°C Typical  
Low Impedance Output, 0.1 Ω for 1 mA Load  
+VS  
(4 V to 20 V)  
+VS  
LM35  
VOUT  
R1  
OUTPUT  
0 mV + 10.0 mV/°C  
LM35  
tVS  
Figure 1. Basic Centigrade Temperature Sensor  
(+2°C to +150°C)  
Choose R1 = –VS / 50 µA  
VOUT = 1500 mV at 150°C  
VOUT = 250 mV at 25°C  
VOUT = –550 mV at –55°C  
Figure 2. Full-Range Centigrade Temperature  
Sensor  
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.  
2
All trademarks are the property of their respective owners.  
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