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LM35 -
Precision Centigrade Temperature Sensor
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Features
| • | Calibrated directly in ° Celsius (Centigrade) |
| • | Linear + 10.0 mV/°C scale factor |
| • | 0.5°C accuracy guaranteeable (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 |
| • | Nonlinearity only ±¼°C typical |
| • | Low impedance output, 0.1 Ohm for 1 mA load |
General Description
The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. More...
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Typical Application
*click for larger image
| Parameters | Values |
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| Temperature Accuracy (+/-) |
1, 0.5 deg C |
| Supply Min |
4 Volt |
| Quiescent Current_ |
56 uA |
| Temperature Min |
-40, 0, -55 deg C |
| Temperature Max |
100, 110, 150 deg C |
| Sensor Gain |
10 mV/Deg C |
| Supply Max |
30 Volt |
| Single Supply |
No |
| Output Impedance |
0.4 Ohm |
| Quiescent Current |
0.056 mA |
| Automotive |
Yes |
Typical Performance
*click for larger image
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Also Recommended
| LM94022▲ | Multi-gain, Lower Minimum Supply Voltage, Lower Supply Current |
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Datasheet
RoHS Compliance Information
| Size in Kbytes | Date |
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| LM35 Precision Centigrade Temperature Sensors |
303
Kbytes |
30-Nov-00 |
Download |
LM35 Precision Centigrade Temperature Sensors (Japanese)
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313 Kbytes |
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Package Availability, Models, Samples & Pricing
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 ±¼°C at room temperature and ±¾°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.
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
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LM35CAZ | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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LM35CZ | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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LM35DM | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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LM35DMX | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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LM35DT | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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LM35DZ | SLM | 0 | 44046 | 0 | 0 | 3532500 | 1 | 1002356520
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Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR.
The Long Term Failure Rates were calculated
at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress
temperature of 150°C to an application temperature of 55°C.
For more information on Reliability Metrics, please click here.
Application Notes
| Title | Size in Kbytes |
Date |
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| AN-460: Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors |
306
Kbytes |
20-Sep-02 |
Download |
AN-460 (Japanese): Application Note 460 LM34/LM35 Precision Monolithic Temperature Sensors
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322 Kbytes |
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| AN-1852: Application Note 1852 Designing With pH Electrodes |
190
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25-Sep-08 |
Download |
[Information as of 7-Nov-2009]
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