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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 With less
than 1X dynamic impedance the device operates over a
current range of 400 mA to 5mA 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 The low impedance and linear output make interfacing to readout or control circuitryespecially 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-92 packages

Features
Y
Y
Y
Y
Y
Y
Y
Y

Directly calibrated inKelvin
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
SO-8
Surface Mount Package

TO-92
Plastic Package

TO-46
Metal Can Package

TL H 5698–8

Bottom View

TL H 5698 – 26

Order Number LM335Z orLM335AZ
See NS Package Number Z03A

C1995 National Semiconductor Corporation

TL H 5698

TL H 5698 – 25

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

LM135 LM235 LM335 LM135A LM235A LM335APrecision Temperature Sensors

February 1995

Absolute Maximum Ratings
Specified Operating Temp Range

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 CTO-92 Package
b 65 C to a 150 C
SO-8 Package

Temperature Accuracy LM135
Parameter

Continuous
b 55 C to a 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 C260
300
300
215
220

C
C
C
C
C

LM235 LM135A LM235A (Note 1)
LM135A LM235A

Conditions

LM135 LM235

Units

Min

Typ

Max

Min

Typ

Max

2 97

2 95

Operating Output Voltage

TC e 25 C IR e 1 mA

2 98

2 99

2 98

3 01

V

Uncalibrated Temperature Error

TC e 25 C IR e 1 mA

05

1

1

3

C

Uncalibrated Temperature Error

TMIN sTC s TMAX IR e 1 mA

13

27

2

5

C

Temperature Error with 25 C
Calibration

TMIN s TC s TMAX IR e 1 mA

03

1

05

15

C

Calibrated Error at Extended
Temperatures

TC e TMAX (Intermittent)

Non-Linearity

IR e 1 mA

Temperature Accuracy LM335
Parameter

2

2

03

05

C

03

1

C

LM335A (Note 1)
LM335A

Conditions

LM335

UnitsMin

Typ

Max

Min

Typ

Max

2 95

2 92

Operating Output Voltage

TC e 25 C IR e 1 mA

2 98

3 01

2 98

3 04

V

Uncalibrated Temperature Error

TC e 25 C IR e 1 mA

1

3

2

6

C

Uncalibrated Temperature Error

TMIN s TC s TMAX IR e 1 mA

2

5

4

9

C

Temperature Error with 25 C
Calibration

TMIN s TC s TMAX IR e 1 mA

05

1...
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