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Part: LM335A
Category:
Sensors
-> Temperature Sensors
Description: Precision Temperature Sensor
Company: National Semiconductor Corporation
Datasheet: Download LM335A datasheet File size : 113 kB
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Datasheet text preview:
LM135/LM235/LM335, LM135A/LM235A/LM335A Precision Temperature Sensors
November 2000
LM135/LM235/LM335, LM135A/LM235A/LM335A Precision Temperature Sensors
General Description
The LM135 series are precision, easily-calibrated, integrated circuit temperature sensors. Operating as a 2-terminal zener, the LM135 has a breakdown voltage directly proportional to absolute temperature at +10 mV/°K. With less than 1 dynamic impedance the device operates over a current range of 400 µA to 5 mA with virtually no change in performance. When calibrated at 25°C the LM135 has typically less than 1°C error over a 100°C temperature range. Unlike other sensors the LM135 has a linear output. Applications for the LM135 include almost any type of temperature sensing over a -55°C to +150°C temperature range. The low impedance and linear output make interfacing to readout or control circuitry especially easy. The LM135 operates over a -55°C to +150°C temperature range while the LM235 operates over a -40°C to +125°C temperature range. The LM335 operates from -40°C to +100°C. The LM135/LM235/LM335 are available packaged in hermetic TO-46 transistor packages while the LM335 is also available in plastic TO-92 packages.
Features
n n n n n n n n Directly calibrated in °Kelvin 1°C initial accuracy available Operates from 400 µA to 5 mA Less than 1 dynamic impedance Easily calibrated Wide operating temperature range 200°C overrange Low cost
Schematic Diagram
DS005698-1
© 2000 National Semiconductor Corporation
DS005698
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LM135/LM235/LM335, LM135A/LM235A/LM335A
Connection Diagrams
TO-92 Plastic Package SO-8 Surface Mount Package TO-46 Metal Can Package*
DS005698-8
Bottom View Order Number LM335Z or LM335AZ See NS Package Number Z03A
DS005698-26 DS005698-25
*Case is connected to negative pin
Order Number LM335M See NS Package Number M08A
Bottom View Order Number LM135H, LM135H-MIL, LM235H, LM335H, LM135AH, LM235AH or LM335AH See NS Package Number H03H
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LM135/LM235/LM335, LM135A/LM235A/LM335A
Absolute Maximum Ratings (Note 4)
If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Reverse Current Forward Current Storage Temperature TO-46 Package TO-92 Package SO-8 Package 15 mA 10 mA -60°C to +180°C -60°C to +150°C -65°C to +150°C
Specified Operating Temp. Range Continuous LM135, LM135A -55°C to +150°C LM235, LM235A -40°C to +125°C LM335, LM335A -40°C to +100°C Lead Temp. (Soldering, 10 seconds) TO-92 Package: TO-46 Package: SO-8 Package: Vapor Phase (60 seconds): Infrared (15 seconds): Intermittent (Note 2) 150°C to 200°C 125°C to 150°C 100°C to 125°C 260°C 300°C 300°C 215°C 220°C
Temperature Accuracy (Note 1)
LM135/LM235, LM135A/LM235A Parameter Operating Output Voltage Uncalibrated Temperature Error Uncalibrated Temperature Error Temperature Error with 25°C Calibration Calibrated Error at Extended Temperatures Non-Linearity IR = 1 mA 0.3 0.5 0.3 1 °C TC = TMAX (Intermittent) 2 2 °C Conditions TC = 25°C, IR = 1 mA TC = 25°C, IR = 1 mA TMIN TC TMAX, IR = 1 mA TMIN TC TMAX, IR = 1 mA LM135A/LM235A Min 2.97 Typ 2.98 0.5 1.3 0.3 Max 2.99 1 2.7 1 LM135/LM235 Min 2.95 Typ 2.98 1 2 0.5 Max 3.01 3 5 1.5 V °C °C °C Units
Temperature Accuracy (Note 1)
LM335, LM335A Parameter Operating Output Voltage Uncalibrated Temperature Error Uncalibrated Temperature Error Temperature Error with 25°C Calibration Calibrated Error at Extended Temperatures Non-Linearity IR = 1 mA 0.3 1.5 0.3 1.5 °C TC = TMAX (Intermittent) 2 2 °C Conditions Min TC = 25°C, IR = 1 mA TC = 25°C, IR = 1 mA TMIN TC TMAX, IR = 1 mA TMIN TC TMAX, IR = 1 mA 2.95 LM335A Typ 2.98 1 2 0.5 Max 3.01 3 5 1 Min 2.92 LM335 Typ 2.98 2 4 1 Max 3.04 6 9 2 V °C °C °C Units
Electrical Characteristics (Note 1)
LM135/LM235 Parameter Operating Output Voltage Change with Current Dynamic Impedance Output Voltage Temperature Coefficient Time Constant Still Air 100 ft/Min Air Stirred Oil Time Stability TC = 125°C 80 10 1 0.2 80 10 1 0.2 sec sec sec °C/khr Conditions 400 µAIR5 mA At Constant Temperature IR = 1 mA 0.5 +10 0.6 +10 mV/°C LM135A/LM235A Min Typ 2.5 Max 10 Min LM335 LM335A Typ 3 Max 14 mV Units
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