DISCRETE SEMICONDUCTORS
DATA SHEET
ook, halfpage
M3D239
KTY81-2 series
Silicon temperature sensors
Product specification
Supersedes data of 1998 Mar 26
2000 Aug 25
Philips Semiconductors
Product specification
Silicon temperature sensors
DESCRIPTION
The temperature sensors in the KTY81-2 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 leaded plastic
package.
Tolerances of 0.5% or other special selections are
available on request.
MARKING
TYPE NUMBER
KTY81-210
KTY81-220
KTY81-221
KTY81-222
KTY81-250
KTY81-251
KTY81-252
QUICK REFERENCE DATA
SYMBOL
R
25
PARAMETER
sensor resistance
KTY81-210
KTY81-220
KTY81-221
KTY81-222
KTY81-250
KTY81-251
KTY81-252
T
amb
ambient operating
temperature
CONDITIONS
T
amb
= 25
°C;
I
cont
= 1 mA
1980
1960
1960
2000
1900
1900
2000
−55
MIN.
CODE
210
220
221
222
250
251
252
handbook, halfpage
KTY81-2 series
PINNING
PIN
1
2
3
DESCRIPTION
electrical contact
electrical contact
not to be connected to a potential
1
3
2
MBH739
Fig.1 Simplified outline (SOD70).
MAX.
2020
2040
2000
2040
2100
2000
2100
+150
Ω
Ω
Ω
Ω
Ω
Ω
Ω
°C
UNIT
2000 Aug 25
2
Philips Semiconductors
Product specification
Silicon temperature sensors
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 60134).
SYMBOL
I
cont
T
amb
PARAMETER
continuous sensor current
ambient operating temperature
CONDITIONS
in free air; T
amb
= 25
°C
in free air; T
amb
= 150
°C
−
−
−55
KTY81-2 series
MIN.
2
MAX.
10
+150
UNIT
mA
mA
°C
CHARACTERISTICS
T
amb
= 25
°C,
in liquid, unless otherwise specified.
SYMBOL
R
25
PARAMETER
sensor resistance
KTY81-210
KTY81-220
KTY81-221
KTY81-222
KTY81-250
KTY81-251
KTY81-252
TC
R
100
/R
25
R
−55
/R
25
τ
temperature coefficient
resistance ratio
resistance ratio
thermal time constant; note 1
CONDITIONS
I
cont
= 1 mA
1980
1960
1960
2000
1900
1900
2000
−
T
amb
= 100
°C
and 25
°C
1.676
T
amb
=
−55 °C
and 25
°C
0.480
in still air
in still liquid; note 2
in flowing liquid; note 2
rated temperature range
Notes
1. 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.
2. Inert liquid, e.g. FC43 manufactured by the 3M company.
−
−
−
−55
−
−
−
−
−
−
−
0.79
1.696
0.490
30
5
3
−
2020
2040
2000
2040
2100
2000
2100
−
1.716
0.500
−
−
−
+150
s
s
s
°C
Ω
Ω
Ω
Ω
Ω
Ω
Ω
%/K
MIN.
TYP.
MAX.
UNIT
2000 Aug 25
3
Philips Semiconductors
Product specification
Silicon temperature sensors
Table 1
KTY81-2 series
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-210 and KTY81-220
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-210
RESISTANCE
(Ω)
MIN.
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
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
0.59
0.53
0.49
0.44
0.33
0.20
951
1000
1105
1218
1338
1467
1603
1748
1901
1980
2057
2217
2383
2557
2737
2924
3118
3318
3523
3722
3815
3901
4049
4153
TYP.
980
1030
1135
1247
1367
1495
1630
1772
1922
2000
2080
2245
2417
2597
2785
2980
3182
3392
3607
3817
3915
4008
4166
4280
MAX.
1009
1059
1165
1277
1396
1523
1656
1797
1944
2020
2102
2272
2451
2637
2832
3035
3246
3466
3691
3912
4016
4114
4283
4407
TEMP.
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
±3.93
±4.7
±5.26
±6
±8.45
±14.63
KTY81-220
RESISTANCE
(Ω)
MIN.
941
990
1094
1205
1325
1452
1587
1730
1881
1960
2036
2194
2359
2531
2709
2894
3086
3284
3487
3683
3775
3861
4008
4110
TYP.
980
1030
1135
1247
1367
1495
1630
1772
1922
2000
2080
2245
2417
2597
2785
2980
3182
3392
3607
3817
3915
4008
4166
4280
MAX.
1019
1070
1176
1289
1410
1538
1673
1814
1963
2040
2123
2295
2475
2663
2860
3065
3278
3500
3728
3950
4055
4154
4325
4450
TEMP.
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
±5.61
±6.59
±7.31
±8.27
±11.46
±19.56
(°C)
(°F)
(%/K)
2000 Aug 25
4
Philips Semiconductors
Product specification
Silicon temperature sensors
Table 2
KTY81-2 series
Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-221 and KTY81-222
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-221
RESISTANCE
(Ω)
MIN.
−55
−50
−40
−30
−20
−10
0
10
20
25
30
40
50
60
70
80
90
100
110
120
125
130
140
150
−67
−58
−40
−22
−4
14
32
50
68
77
86
104
122
140
158
176
194
212
230
248
257
266
284
302
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
0.59
0.53
0.49
0.44
0.33
0.20
941
990
1094
1205
1325
1452
1587
1730
1882
1960
2037
2195
2360
2531
2710
2895
3086
3285
3488
3684
3776
3862
4009
4112
TYP.
970
1019
1123
1235
1354
1480
1613
1754
1903
1980
2059
2222
2393
2571
2757
2950
3150
3358
3571
3779
3876
3967
4125
4237
MAX.
999
1049
1153
1264
1382
1508
1640
1779
1924
2000
2081
2250
2426
2611
2804
3005
3214
3431
3655
3873
3976
4073
4241
4363
TEMP.
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
±3.93
±4.7
±5.26
±6
±8.45
±14.63
KTY81-222
RESISTANCE
(Ω)
MIN.
960
1010
1116
1230
1352
1481
1619
1765
1920
2000
2078
2239
2407
2582
2764
2 953
3149
3351
3558
3759
3853
3940
4090
4195
TYP.
990
1040
1146
1260
1381
1510
1646
1790
1941
2020
2100
2267
2441
2623
2812
3009
3214
3426
3643
3855
3955
4048
4208
4323
MAX.
1020
1070
1176
1290
1410
1538
1673
1815
1963
2040
2123
2295
2475
2664
2860
3065
3279
3501
3728
3951
4056
4155
4326
4451
TEMP.
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
±3.93
±4.7
±5.26
±6
±8.45
±14.63
(°C)
(°F)
(%/K)
2000 Aug 25
5