Lm335

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LM135 LM235 LM335 LM135A LM235A LM335A Precision Temperature Sensors

February 1995

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 a 10 mV K Withless than 1X dynamic impedance the device operates over a current range of 400 mA 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 b55 C to a 150 C temperature range Thelow impedance and linear output make interfacing to readout or control circuitry especially easy The LM135 operates over a b55 C to a 150 C temperature range while the LM235 operates over a b40 C to a 125 C temperature range The LM335 operates from b40 C to a 100 C The LM135 LM235 LM335 are available packaged in hermetic TO-46 transistor packages while the LM335 is also available in plastic TO-92packages

Features
Y Y Y Y Y Y Y Y

Directly calibrated in Kelvin 1 C initial accuracy available Operates from 400 mA to 5 mA Less than 1X dynamic impedance Easily calibrated Wide operating temperature range 200 C overrange Low cost

Schematic Diagram

TL H 5698 – 1

Connection Diagrams
TO-92 Plastic Package SO-8 Surface Mount Package TO-46 Metal Can Package

TL H 5698–8

BottomView Order Number LM335Z or LM335AZ See NS Package Number Z03A
TL H 5698 – 25

TL H 5698 – 26

Order Number LM335M or LM335AM See NS Package Number M08A

Bottom View
Case is connected to negative pin

Order Number LM135H LM135H-MIL LM235H LM335H LM135AH LM235AH or LM335AH See NS Package Number H03H
RRD-B30M115 Printed in U S A

C1995 National Semiconductor Corporation

TL H 5698 Absolute Maximum Ratings
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications (Note 4) Reverse Current 15 mA Forward Current 10 mA Storage Temperature b 60 C to a 180 C TO-46 Package b 60 C to a 150 C TO-92 Package b 65 C to a 150 C SO-8 Package Specified Operating Temp Range Continuous b 55 C toa 150 C LM135 LM135A b 40 C to a 125 C LM235 LM235A b 40 C to a 100 C LM335 LM335A 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 260 300 300 215 220 C C C C C

Temperature Accuracy LM135
Parameter Operating Output Voltage Uncalibrated Temperature ErrorUncalibrated Temperature Error Temperature Error with 25 C Calibration Calibrated Error at Extended Temperatures Non-Linearity

LM235 LM135A LM235A (Note 1) LM135A LM235A Min Typ 2 98 05 13 03 2 03 LM335A (Note 1) LM335A Min Typ 2 98 1 2 05 2 03 15 Max 3 01 3 5 1 Min 2 92 2 95 LM335 Typ 2 98 2 4 1 2 03 15 Max 3 04 6 9 2 V C C C C C Units 05 Max 2 99 1 27 1 2 97 LM135 LM235 Min 2 95 Typ 2 98 1 205 2 03 1 Max 3 01 3 5 15 V C C C C C Units

Conditions TC e 25 C IR e 1 mA TC e 25 C IR e 1 mA TMIN s TC s TMAX IR e 1 mA TMIN s TC s TMAX IR e 1 mA TC e TMAX (Intermittent) IR e 1 mA

Temperature Accuracy LM335
Parameter Operating Output Voltage Uncalibrated Temperature Error Uncalibrated Temperature Error Temperature Error with 25 C Calibration Calibrated Error at Extended TemperaturesNon-Linearity

Conditions TC e 25 C IR e 1 mA TC e 25 C IR e 1 mA TMIN s TC s TMAX IR e 1 mA TMIN s TC s TMAX IR e 1 mA TC e TMAX (Intermittent) IR e 1 mA

Electrical Characteristics (Note 1)
Parameter Operating Output Voltage Change with Current Dynamic Impedance Output Voltage Temperature Coefficient Time Constant Still Air 100 ft Min Air Stirred Oil TC e 125 C Conditions 400 mAsIRs5 mA At...
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