STMicroelectronics 的 LM135,235,335 规格书

February 2008 Rev 3 1/16
16
LM135-LM235-LM335
Precision temperature sensors
Features
■Directly calibrated in °K
■1°C initial accuracy
■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.
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.
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.
TO-92
(Plastic package)
SO-8
(Plastic micropackage)
TO-92
(Bottom view)
SO-8
(Top view)
Pin connections
ADJ
v+ v-
8765
1234
V+ NC ADJ
NC NC V
NC
NC
-
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nu: .mu mm: mm; . , H L» 1 (Hz « ; I am; In: ‘ m; x Am
Schematic diagram LM135-LM235-LM335
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1 Schematic diagram
Figure 1. Schematic diagram
2 Absolute maximum ratings
Table 1. Absolute maximum ratings (AMR)
Symbol Parameter LM135 LM235 LM335-
LM335A Unit
IR
IF
Current
Reverse
Forward 15
10 mA
Toper
Operating free-air temperature
range(1)
Continuous
Intermittent
1. Tj ≤ 150°C
-55 to +150
+150 to +200 -40 to +125
+125 to +150 -40 to +100
+100 to +125
°C
Tstg Storage temperature range -65 to +150 °C
LM135-LM235-LM335 Temperature accuracy
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3 Temperature accuracy
4 Electrical characteristics
Note: Accuracy measurements are made in a well-stirred oil bath. For other conditions, self-
heating must be considered
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)
Tcase = +25°C
Tmin ≤ T
case ≤ T
max
1
23
54
56
9°C
Temperature error with 25°C calibration
Tmin ≤ T
case ≤ T
max., IR = 1mA
LM135 - LM235
LM335
LM335A
0.5
0.5
1.5
112
°C
Calibrated error at extended temperature
Tcase = Tmax (intermittent) 22°C
Non-linearity (IR = 1mA)
LM135 - LM235
LM335
LM335A
0.3
0.3
1
1.5 0.3 1.5 °C
Table 3. Electrical characteristics
Parameter LM135 - LM235 LM335-LM335A Unit
Min. Typ. Max. Min. Typ. Max.
Operating output voltage change with current
450µA ≤ I
R ≤ 5mA at constant temperature 2.5 10 3 14 mV
Dynamic impedance (IR = 1mA) 0.5 0.6 Ω
Output voltage temperature drift +10 +10 mV/°C
Time constant
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
25 ms 155 Oman! 1 360 32m 250 an 200 mo \k Inx mok Frequency (Hz)
Electrical characteristics LM135-LM235-LM335
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Figure 2. Reverse voltage change Figure 3. Calibrated error
Reverse current (mA)
Reverse voltage change (mV)
Temperature (°C)
Calibrated error (°C)
Figure 4. Reverse characteristics Figure 5. Response time
Reverse current (mA)
Reverse voltage (V)
Voltage swing (V)
Time (µs)
Figure 6. Dynamic impedance Figure 7. Noise voltage
Dynamic impedance (Ohm)
Frequency (Hz)
Noise (nV/√Hz)
Frequency (Hz)
40B 300 200 mu we «a 2n I00 50 an on 20
LM135-LM235-LM335 Electrical characteristics
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Figure 8. Thermal resistance junction to air Figure 9. Thermal time constant
Thermal resistance (°C/W)
Air velocity (m/s) Air velocity (m/s)
Time constant (s)
Figure 10. Thermal response in still air Figure 11. Thermal response in stirred oil bath
Figure 12. Forward characteristics
Percent of final value (%)
Time (min)
Percent of final value (%)
Time (s)
Forward voltage (V)
Forward current (mA)
‘ m l LM135 , OU‘PU' LM235 10mV/“K LM335 ostomov LM134. LM234 ‘[ LM334 \ i J law 01“ [ LM135 ‘ Hi 10m$K LM235 LM335
Application information LM135-LM235-LM335
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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:
VOT + VOTO x
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
T
To
-------
Figure 13. Basic temperature sensor Figure 14. Wide operating supply
v‘ +15v I RI an; 'F Ouiput Ompul ? ’10mV/‘K 30mV/‘K LM135 LM235 10M? LM135 LM335 LM235 LM335 .._ LM135 LM235 LM335 «15v 7 ’I T ~15v 50m \ - . 7 m=1 1N457 o1“; 73km _“"‘- H I ll 01,”: ‘ ‘ 2m II is 8 5 510m ‘ 10m 1 LM311 ‘6 i ‘ K1 {7' ‘ 3 5i OWN} ‘ 1kg: 7 , 5 1DmV/K . y 1 1N4148 T 4 _ ‘ 10m 2DUFF 27m mom 7 L n \ . . 45v I1N4148 .15v =1ODOVF
LM135-LM235-LM335 Application information
7/16
Figure 17. Isolated temperature sensor
Figure 15. Calibrated sensor Figure 16. Average temperature sensing
* Calibrated for 2.982V at 25°C
+10V lo +30V 2m _.J 10k: 5m 10m E ”93'” 2 ,\[ 5 0.01uF 6 s 1N4568T = LM311 7 7 Buvze 10k“ 4 \ 3 , ‘7,“ 4kg LM135 LM235 LM335 1m +15v '—‘ +15v +15v 6m 2 - 7 12m LM308 5 Output 3 . a , 10mV/"C I LM135 8.5m LM235 10m LM335 mm) L 2m' 100pF ‘ ‘ Admit 1m 2 7315v at output 0' LMSOB I
Application information LM135-LM235-LM335
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Figure 18. Simple temperature controller
Figure 19. Centigrade thermometer
415V 12m 12m 20k” [—1 |—l _ Output 20m 100mV/‘C r—fi \_l 180“ LM135 mass ‘1‘ ‘1‘ “W LM335 7"“ "°' R3 777 W Wr" oouplo Caoflclonl >15v J 37752 52 BuvPC T 3080 42,3uvPc K 293:) aomvflc 1 47m ,5 asvenr BAqu'C ‘ L 200m musxmems communes ior bolh 51mm - ~ { , andreslsbf tolerances R2 - 1% R3. 1. sum 1mm 2 mm R1 m sseascx eocmmm um macaw“) J-rl: { 4‘ \ ammonuermemm (m mgmes K) across “I V 1M9 .L. R3 g_. m a. sum mugs and 3am! R2 lnr mung. ._ ‘ moss R3 ourmsprndmg m Invmocnupla 'we LM135“\ R1 J 14,32mv K III7mV ”“235 . 10m T umnv s L7bflmV ”“35. ‘ >7 _- 'Aqm ‘; 11.5w “haw-mule {12m 1% _L l ‘ 1 45V ' Sol-d R3 my move! lhdmocuup‘e lyne £7
LM135-LM235-LM335 Application information
9/16
Figure 20. Differential temperature sensor
Figure 21. Thermocouple cold junction compensation (compensation for grounded
thermocouple)
.15v 10“) 20mg . f "T o- . V iThmuwe [M135 1 m ' ‘7 LM215 ' 10m R3 mass 1 _ ‘. ._ aw i. \ 1 L 1 zoom V OI I 1msss , .4‘ 7kg, "p” Ry“ mm, ‘ ml ‘1 ‘ { kn , J _ ‘RA‘ ' 8916:: R3 an! m an proper mermooouple Scohock “3 Rf Coeflldem 1 05m 365!) 52.3pvfc 8561) 315:: 42 suvr’c 31m 30m ‘ 40 Jaw/“c 12m 46 1707 6 AquC Adjosunenls 1 mum R1 in: ma mug. nuns; R3 equal m we SEEBECK mama-m um ammm Ianmmm m dogma: Kalvm, 2. must R2 lo! voruoa mass M correspon- mnq Io IMFmocouple J 14 azmv T 11 mm K s H.17mv ”va
Application information LM135-LM235-LM335
10/16
Figure 22. Single power supply cold junction compensation
LM135-LM235-LM335 Package information
11/16
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
P
A
T
H
H1
H
L1
d
I1
H0
W2
W0
W1
W
D0
F1 F2
P2
P0
Package information LM135-LM235-LM335
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Table 4. TO-92 tape & reel package mechanical data
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
AL 5.0 0.197
A 5.0 0.197
T 4.0 0.157
d 0.45 0.018
I1 2.5 0.098
P 11.7 12.7 13.7 0.461 0.500 0.539
PO 12.4 12.7 13 0.488 0.500 0.512
P2 5.95 6.35 6.75 0.234 0.250 0.266
F1/F2 2.4 2.5 2.8 0.094 0.098 0.110
Δh -1 0 1 -0.039 0 0.039
ΔP -1 0 1 -0.039 0 0.039
W 17.5 18.0 19.0 0.689 0.709 0.748
W0 5.7 6 6.3 0.224 0.236 0.248
W1 8.5 9 9.75 0.335 0.354 0.384
W2 0.5 0.020
H200.787
H0 15.5 16 16.5 0.610 0.630 0.650
H1 25 0.984
DO 3.8 4.0 4.2 0.150 0.157 0.165
L1 11 0.433
LM135-LM235-LM335 Package information
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6.2 TO-92 bulk package information
Figure 24. TO-92 bulk package mechanical drawing
Table 5. TO-92 bulk package mechanical data
Dim. Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
L 1.27 0.05
B 3.2 3.7 4.2 0.126 0.1457 0.1654
O1 4.45 5.00 5.2 0.1752 0.1969 0.2047
C 4.58 5.03 5.33 0.1803 0.198 0.2098
K12.7 0.5
O2 0.407 0.5 0.508 0.016 0.0197 0.02
a 0.35 0.0138
Package information LM135-LM235-LM335
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6.3 SO-8 package information
Figure 25. SO-8 package mechanical drawing
Table 6. SO-8 package mechanical data
Ref.
Dimensions
Millimeters Inches
Min. Typ. Max. Min. Typ. Max.
A1.750.069
A1 0.10 0.25 0.004 0.010
A2 1.25 0.049
b 0.28 0.48 0.011 0.019
c 0.17 0.23 0.007 0.010
D 4.80 4.90 5.00 0.189 0.193 0.197
H 5.80 6.00 6.20 0.228 0.236 0.244
E1 3.80 3.90 4.00 0.150 0.154 0.157
e 1.27 0.050
h 0.25 0.50 0.010 0.020
L 0.40 1.27 0.016 0.050
k1°8°1°8°
ccc 0.10 0.004
LM135-LM235-LM335 Ordering information
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7 Ordering information
8 Revision history
Table 7. Order codes
Order code Temperature
range Package Packing Marking
LM135Z -55°C to +150°C TO-92 Bulk LM135
LM235D
LM235DT -40°C to +125°C SO-8 Tube or
Tape & reel LM235
LM235Z -40°C to +125°C TO-92 Bulk LM235
LM335D
LM335DT -40°C to +100°C SO-8 Tube or
Tape & reel
LM335
LM335AD
LM335ADT LM335A
LM335Z
-40°C to +100°C TO-92
Bulk LM335
LM335AZ
LM335AZT Bulk or
Tape & reel LM335A
Table 8. Document revision history
Date Revision Changes
6-May-2003 1 Initial release.
13-April-2004 2 Corrected error in pinout diagram for TO-92 package on cover page
(it is a bottom view, not a top view).
11-Feb-2007 3
Updated Section 6: Package information and Table 7: Order codes.
Corrected typical values for uncalibrated temperature error in
Table 2.
Improved quality of electrical characteristics curves.
LM135-LM235-LM335
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