LM135Z-AP [STMICROELECTRONICS]
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| 型号： | LM135Z-AP |
| 厂家： | 
ST |
| 描述： | 暂无描述 传感器 温度传感器 |
| 文件： | 总16页 (文件大小：574K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LM135-LM235-LM335
Precision temperature sensors
Features
■ Directly calibrated in °K
■ 1°C initial accuracy
TO-92
(Plastic package)
■ Operates from 450µA to 5mA
■ Less than 1Ω dynamic impedance
Description
The LM135, LM235, LM335 are precision
temperature sensors which can be easily
calibrated. They operate as a 2-terminal Zener
and the breakdown voltage is directly proportional
to the absolute temperature at 10mV/°K.
SO-8
(Plastic micropackage)
Pin connections
The circuit has a dynamic impedance of less than
1Ω and operates within a range of current from
450µA to 5mA without alteration of its
characteristics.
TO-92
(Bottom view)
Calibrated at +25°C, the LM135, LM235, and
LM335 have a typical error of less than 1°C over a
100°C temperature range. Unlike other sensors,
the LM135, LM235, LM335 have a linear output.
v-
ADJ
v+
SO-8
(Top view)
NC
6
V+
8
NC
7
ADJ
5
1
NC
2
3
NC
4
V
-
NC
February 2008
Rev 3
1/16
www.st.com
16
Schematic diagram
LM135-LM235-LM335
1
Schematic diagram
Figure 1.
Schematic diagram
2
Absolute maximum ratings
Table 1.
Symbol
Absolute maximum ratings (AMR)
Parameter LM135
LM335-
Unit
LM235
LM335A
Current
Reverse
Forward
IR
IF
mA
°C
15
10
Operating free-air temperature
range(1)
Toper
Continuous
Intermittent
-55 to +150 -40 to +125 -40 to +100
+150 to +200 +125 to +150 +100 to +125
Tstg
Storage temperature range
-65 to +150
°C
1. Tj ≤ 150°C
2/16
LM135-LM235-LM335
Temperature accuracy
3
Temperature accuracy
Table 2.
Temperature accuracy
Parameter
LM135 - LM235 -
LM335A
LM335
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Operating output voltage
Tcase = +25°C, IR = 1mA
2.95
2.98
3.01
2.92
2.98
3.04
V
Uncalibrated temperature error (IR = 1mA)
1
2
3
5
4
5
6
9
°C
Tcase = +25°C
Tmin ≤ Tcase ≤ Tmax
Temperature error with 25°C calibration
Tmin ≤ Tcase ≤ Tmax., IR = 1mA
°C
LM135 - LM235
LM335
LM335A
0.5
0.5
1.5
1
1
2
2
Calibrated error at extended temperature
Tcase = Tmax (intermittent)
2
°C
°C
Non-linearity (IR = 1mA)
0.3
0.3
1
LM135 - LM235
LM335
LM335A
0.3
1.5
1.5
4
Electrical characteristics
Table 3.
Electrical characteristics
Parameter
LM135 - LM235
LM335-LM335A
Unit
Min.
Typ.
Max.
Min.
Typ.
Max.
Operating output voltage change with current
450µA ≤ IR ≤ 5mA at constant temperature
2.5
0.5
10
3
14
mV
Ω
Dynamic impedance (IR = 1mA)
Output voltage temperature drift
Time constant
0.6
+10
+10
mV/°C
Still air
Air 0.5m/s
Stirred oil
80
10
1
80
10
1
s
Time stability (Tcase = +125°C)
0.2
0.2
°C/kh
Note:
Accuracy measurements are made in a well-stirred oil bath. For other conditions, self-
heating must be considered
3/16
Electrical characteristics
LM135-LM235-LM335
Figure 2.
Figure 4.
Figure 6.
Reverse voltage change
Figure 3.
Figure 5.
Figure 7.
Calibrated error
Temperature (°C)
Response time
Reverse current (mA)
Reverse characteristics
Reverse voltage (V)
Time (µs)
Dynamic impedance
Noise voltage
Frequency (Hz)
Frequency (Hz)
4/16
LM135-LM235-LM335
Electrical characteristics
Figure 8.
Thermal resistance junction to air Figure 9.
Thermal time constant
Air velocity (m/s)
Air velocity (m/s)
Figure 10. Thermal response in still air
Figure 11. Thermal response in stirred oil bath
Time (min)
Time (s)
Figure 12. Forward characteristics
Forward current (mA)
5/16
Application information
LM135-LM235-LM335
5
Application information
There is an easy method of calibrating the device for higher accuracies (see Typical
applications).
The single point calibration works because the output of the LM135, LM235, LM335 is
proportional to the absolute temperature with the extrapolated output of sensor going to 0V
at 0°K (-273.15°C). Errors in output voltage versus temperature are only slope. Thus a
calibration of the slope at one temperature corrects errors at all temperatures.
The circuit output (calibrated or not) is given by the equation:
T
To
V
+ VO
x
------
OT
TO
where T is the unknown temperature and To is the reference temperature (in °K).
Nominally, the output is calibrated at 10mV/°K.
Precautions should be taken to ensure good sensing accuracy. As in the case of all
temperatures sensors, self-heating can decrease accuracy. The LM135, LM235, and LM335
should operate with a low current but sufficient to drive the sensor and its calibration circuit
to their maximum operating temperature.
If the sensor is used in surroundings where the thermal resistance is constant, the errors
due to self-heating can be externally calibrated. This is possible if the circuit is biased with a
temperature stable current. Heating will then be proportional to Zener voltage and therefore
temperature. In this way, the error due to self-heating is proportional to the absolute
temperature as scale factor errors.
Typical applications
Figure 13. Basic temperature sensor
Figure 14. Wide operating supply
6/16
LM135-LM235-LM335
Application information
Figure 15. Calibrated sensor
Figure 16. Average temperature sensing
* Calibrated for 2.982V at 25°C
Figure 17. Isolated temperature sensor
7/16
Application information
LM135-LM235-LM335
Figure 18. Simple temperature controller
Figure 19. Centigrade thermometer
8/16
LM135-LM235-LM335
Application information
Figure 20. Differential temperature sensor
Figure 21. Thermocouple cold junction compensation (compensation for grounded
thermocouple)
9/16
Application information
LM135-LM235-LM335
Figure 22. Single power supply cold junction compensation
10/16
LM135-LM235-LM335
Package information
6
Package information
In order to meet environmental requirements, STMicroelectronics offers these devices in
®
ECOPACK packages. These packages have a lead-free second level interconnect. The
category of second level interconnect is marked on the package and on the inner box label,
in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an STMicroelectronics
trademark. ECOPACK specifications are available at: www.st.com.
6.1
TO-92 tape & reel package information
Figure 23. TO-92 tape & reel package mechanical drawing
A1
P
T
P
H
d
D0
F1
F2
P2
P0
11/16
Package information
LM135-LM235-LM335
Inches
Table 4.
Dim.
TO-92 tape & reel package mechanical data
Millimeters
Min.
Typ.
Max.
Min.
Typ.
Max.
AL
A
5.0
5.0
4.0
0.197
0.197
0.157
T
d
0.45
0.018
I1
2.5
11.7
12.4
5.95
2.4
0.098
0.461
0.488
0.234
0.094
-0.039
-0.039
0.689
0.224
0.335
P
12.7
12.7
6.35
2.5
0
13.7
13
0.500
0.500
0.250
0.098
0
0.539
0.512
0.266
0.110
0.039
0.039
0.748
0.248
0.384
0.020
0.787
0.650
0.984
0.165
0.433
PO
P2
F1/F2
Δh
ΔP
W
6.75
2.8
1
-1
-1
0
1
0
17.5
5.7
18.0
6
19.0
6.3
9.75
0.5
20
0.709
0.236
0.354
W0
W1
W2
H
8.5
9
H0
H1
DO
L1
15.5
3.8
16
16.5
25
0.610
0.150
0.630
0.157
4.0
4.2
11
12/16
LM135-LM235-LM335
Package information
6.2
TO-92 bulk package information
Figure 24. TO-92 bulk package mechanical drawing
Table 5.
Dim.
TO-92 bulk package mechanical data
Millimeters
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
L
B
1.27
3.7
0.05
3.2
4.45
4.58
12.7
0.407
0.35
4.2
5.2
0.126
0.1752
0.1803
0.5
0.1457
0.1969
0.198
0.1654
0.2047
0.2098
O1
C
5.00
5.03
5.33
K
O2
a
0.5
0.508
0.016
0.0138
0.0197
0.02
13/16
Package information
LM135-LM235-LM335
6.3
SO-8 package information
Figure 25. SO-8 package mechanical drawing
Table 6.
Ref.
SO-8 package mechanical data
Millimeters
Dimensions
Inches
Min.
Typ.
Max.
Min.
Typ.
Max.
A
A1
A2
b
1.75
0.25
0.069
0.010
0.10
1.25
0.28
0.17
4.80
5.80
3.80
0.004
0.049
0.011
0.007
0.189
0.228
0.150
0.48
0.23
5.00
6.20
4.00
0.019
0.010
0.197
0.244
0.157
c
D
4.90
6.00
3.90
1.27
0.193
0.236
0.154
0.050
H
E1
e
h
0.25
0.40
1°
0.50
1.27
8°
0.010
0.016
1°
0.020
0.050
8°
L
k
ccc
0.10
0.004
14/16
LM135-LM235-LM335
Ordering information
7
Ordering information
Table 7.
Order codes
Temperature
Order code
Package
TO-92
SO-8
Packing
Marking
LM135
LM235
LM235
LM335
range
LM135Z
-55°C to +150°C
Bulk
LM235D
Tube or
Tape & reel
-40°C to +125°C
-40°C to +125°C
LM235DT
LM235Z
TO-92
Bulk
LM335D
LM335DT
Tube or
Tape & reel
-40°C to +100°C
-40°C to +100°C
SO-8
LM335AD
LM335A
LM335
LM335ADT
LM335Z
Bulk
TO-92
LM335AZ
Bulk or
Tape & reel
LM335A
LM335AZT
8
Revision history
Table 8.
Date
Document revision history
Revision
Changes
6-May-2003
1
Initial release.
Corrected error in pinout diagram for TO-92 package on cover page
(it is a bottom view, not a top view).
13-April-2004
2
Updated Section 6: Package information and Table 7: Order codes.
Corrected typical values for uncalibrated temperature error in
Table 2.
11-Feb-2007
3
Improved quality of electrical characteristics curves.
15/16
LM135-LM235-LM335
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