KTY81 series
Silicon temperature sensors
Rev. 05 — 25 April 2008
Product data sheet
1. Product profile
1.1 General description
The temperature sensors in the KTY81 series have a positive temperature coefficient of
resistance and are suitable for use in measurement and control systems. The sensors are
encapsulated in the SOD70
2 in-line leads plastic
package.
Other special selections are available on request.
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken
during transport and handling.
1.2 Features
I
High accuracy and reliability
I
Positive temperature coefficient;
fail-safe behavior
I
Long-term stability
I
Virtually linear characteristics
1.3 Quick reference data
Table 1.
Quick reference data
T
amb
= 25
°
C; in liquid; unless otherwise specified.
Symbol
R
25
Parameter
sensor resistance
Conditions
I
sen(cont)
= 1 mA
KTY81/110
KTY81/120
KTY81/121
KTY81/122
KTY81/150
KTY81/210
KTY81/220
KTY81/221
KTY81/222
KTY81/250
990
980
980
1000
950
1980
1960
1960
2000
1900
-
-
-
-
-
-
-
-
-
-
1010
1020
1000
1020
1050
2020
2040
2000
2040
2100
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Min
Typ
Max
Unit
NXP Semiconductors
KTY81 series
Silicon temperature sensors
2. Pinning information
Table 2.
Pin
1
2
Pinning
Description
electrical contact
electrical contact
Simplified outline
2
1
3. Ordering information
Table 3.
Ordering information
Package
Name
KTY81/110
KTY81/120
KTY81/121
KTY81/122
KTY81/150
KTY81/210
KTY81/220
KTY81/221
KTY81/222
KTY81/250
-
Description
plastic near cylindrical single-ended package;
2 in-line leads
Version
SOD70
Type number
4. Marking
Table 4.
KTY81/110
KTY81/120
KTY81/121
KTY81/122
KTY81/150
KTY81/210
KTY81/220
KTY81/221
KTY81/222
KTY81/250
KTY81_SER_5
Marking codes
Marking code
110
120
121
122
150
210
220
221
222
250
© NXP B.V. 2008. All rights reserved.
Type number
Product data sheet
Rev. 05 — 25 April 2008
2 of 15
NXP Semiconductors
KTY81 series
Silicon temperature sensors
5. Limiting values
Table 5.
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
I
sen(cont)
T
amb
Parameter
continuous sensor current
ambient temperature
Conditions
in free air; T
amb
= 25
°C
in free air; T
amb
= 150
°C
Min
-
-
−55
Max
10
2
+150
Unit
mA
mA
°C
6. Characteristics
Table 6.
Characteristics
T
amb
= 25
°
C; in liquid; unless otherwise specified.
Symbol
R
25
Parameter
sensor resistance
Conditions
I
sen(cont)
= 1 mA
KTY81/110
KTY81/120
KTY81/121
KTY81/122
KTY81/150
KTY81/210
KTY81/220
KTY81/221
KTY81/222
KTY81/250
TC
R
100
/R
25
R
−55
/R
25
∆R
25
temperature coefficient
resistance ratio
resistance ratio
drift of sensor resistance at
25
°C
T
amb
= 100
°C
and 25
°C
T
amb
=
−55 °C
and 25
°C
10000 h continuous
operation; T
amb
= 150
°C
KTY81/1 series
KTY81/2 series
τ
th
thermal time constant
in still air
in still liquid
in flowing liquid
[1]
[1]
[1]
[1]
Min
990
980
980
1000
950
1980
1960
1960
2000
1900
-
1.676
0.480
Typ
-
-
-
-
-
-
-
-
-
-
0.79
1.696
0.490
Max
1010
1020
1000
1020
1050
2020
2040
2000
2040
2100
-
1.716
0.500
Unit
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
%/K
-
-
-
-
-
1.6
3.2
30
5
3
-
-
-
-
-
Ω
Ω
s
s
s
The thermal time constant is the time taken for the sensor to reach 63.2 % of the total temperature difference. For example, if a sensor
with a temperature of 25
°C
is moved to an environment with an ambient temperature of 100
°C,
the time for the sensor to reach a
temperature of 72.4
°C
is the thermal time constant.
KTY81_SER_5
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 25 April 2008
3 of 15
NXP Semiconductors
KTY81 series
Silicon temperature sensors
Table 7.
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected
temperature error for KTY81/110 and KTY81/120
I
sen(cont)
= 1 mA.
Ambient
temperature
(°C)
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
(°F)
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
Temperature KTY81/110
coefficient
(%/K)
Resistance (Ω)
Min
0.99
0.98
0.96
0.93
0.91
0.88
0.85
0.83
0.80
0.79
0.78
0.75
0.73
0.71
0.69
0.67
0.65
0.63
0.61
0.58
0.55
0.52
0.45
0.35
475
500
552
609
669
733
802
874
950
990
1029
1108
1192
1278
1369
1462
1559
1659
1762
1867
1919
1970
2065
2145
Typ
490
515
567
624
684
747
815
886
961
1000
1040
1122
1209
1299
1392
1490
1591
1696
1805
1915
1970
2023
2124
2211
Max
505
530
582
638
698
761
828
898
972
1010
1051
1136
1225
1319
1416
1518
1623
1733
1847
1963
2020
2077
2184
2277
KTY81/120
Temperature Resistance (Ω)
error (K)
Min
Typ
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
470
495
547
603
662
726
793
865
941
980
1018
1097
1180
1265
1355
1447
1543
1642
1744
1848
1899
1950
2043
2123
490
515
567
624
684
747
815
886
961
1000
1040
1122
1209
1299
1392
1490
1591
1696
1805
1915
1970
2023
2124
2211
Temperature
error (K)
±4.02
±3.94
±3.78
±3.62
±3.45
±3.27
±3.08
±2.88
±2.66
±2.54
±2.68
±2.97
±3.28
±3.61
±3.94
±4.3
±4.66
±5.05
±5.48
±6.07
±6.47
±6.98
±8.51
±11.43
Max
510
535
588
645
705
769
836
907
982
1020
1061
1147
1237
1332
1430
1532
1639
1750
1865
1982
2040
2097
2205
2299
KTY81_SER_5
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 25 April 2008
4 of 15
NXP Semiconductors
KTY81 series
Silicon temperature sensors
Table 8.
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected
temperature error for KTY81/121 and KTY81/122
I
sen(cont)
= 1 mA.
Ambient
temperature
(°C)
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
(°F)
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
Temperature KTY81/121
coefficient
(%/K)
Resistance (Ω)
Min
0.99
0.98
0.96
0.93
0.91
0.88
0.85
0.83
0.80
0.79
0.78
0.75
0.73
0.71
0.69
0.67
0.65
0.63
0.61
0.58
0.55
0.52
0.45
0.35
471
495
547
603
662
726
794
865
941
980
1018
1097
1180
1266
1355
1447
1543
1642
1745
1849
1900
1950
2044
2124
Typ
485
510
562
617
677
740
807
877
951
990
1029
1111
1196
1286
1378
1475
1575
1679
1786
1896
1950
2003
2103
2189
Max
500
524
576
632
691
754
820
889
962
1000
1041
1125
1213
1305
1402
1502
1607
1716
1828
1943
2000
2056
2162
2254
KTY81/122
Temperature Resistance (Ω)
error (K)
Min
Typ
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
480
505
558
615
676
741
810
883
960
1000
1039
1120
1204
1291
1382
1477
1574
1676
1780
1886
1938
1989
2085
2167
495
520
573
630
690
755
823
895
971
1010
1050
1134
1221
1312
1406
1505
1607
1713
1823
1934
1989
2044
2146
2233
Temperature
error (K)
±3.02
±2.92
±2.74
±2.55
±2.35
±2.14
±1.91
±1.67
±1.41
±1.27
±1.39
±1.64
±1.91
±2.19
±2.49
±2.8
±3.12
±3.46
±3.83
±4.33
±4.66
±5.07
±6.28
±8.55
Max
510
535
588
645
705
769
836
907
982
1020
1062
1148
1238
1332
1430
1533
1639
1750
1865
1982
2041
2098
2206
2299
KTY81_SER_5
© NXP B.V. 2008. All rights reserved.
Product data sheet
Rev. 05 — 25 April 2008
5 of 15
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