KTY81-110
DATA SH EET
Product specification
Supersedes data of 1996 Dec 06
File under Discrete Semiconductors, SC17
1998 Mar 26
DISCRETE SEMICONDUCTORS
KTY81-1 series
Silicon temperature sensors
ook, halfpage
M3D239
1998 Mar 26 2
Philips Semiconductors Product specification
Silicon temperature sensors KTY81-1 series
DESCRIPTION
The temperature sensors in the KTY81-1 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.
PINNING
PIN DESCRIPTION
1 electrical contact
2 electrical contact
3 not to be connected to a potential
Fig.1 Simplified outline (SOD70).
handbook, halfpage
MBH739
2
3
1
MARKING
TYPE NUMBER CODE
KTY81-110 110
KTY81-120 120
KTY81-121 121
KTY81-122 122
KTY81-150 150
KTY81-151 151
KTY81-152 152
QUICK REFERENCE DATA
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
R
25
sensor resistance T
amb
=25°C; I
cont
=1mA
KTY81-110 990 1010 Ω
KTY81-120 980 1020 Ω
KTY81-121 980 1000 Ω
KTY81-122 1000 1020 Ω
KTY81-150 950 1050 Ω
KTY81-151 950 1000 Ω
KTY81-152 1000 1050 Ω
T
amb
ambient operating
temperature
−55 +150 °C
1998 Mar 26 3
Philips Semiconductors Product specification
Silicon temperature sensors KTY81-1 series
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
CHARACTERISTICS
T
amb
=25°C, in liquid, unless otherwise specified.
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 47.4 °C is the thermal time constant.
2. Inert liquid, e.g. FC43 manufactured by the 3M company.
SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT
I
cont
continuous sensor current in free air; T
amb
=25°C − 10 mA
in free air; T
amb
= 150 °C − 2mA
T
amb
ambient operating temperature −55 +150 °C
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
R
25
sensor resistance I
cont
=1mA
KTY81-110 990 − 1010 Ω
KTY81-120 980 − 1020 Ω
KTY81-121 980 − 1000 Ω
KTY81-122 1000 − 1020 Ω
KTY81-150 950 − 1050 Ω
KTY81-151 950 − 1000 Ω
KTY81-152 1000 − 1050 Ω
TC temperature coefficient − 0.79 − %/K
R
100/R25
resistance ratio T
amb
= 100 °C and 25 °C 1.676 1.696 1.716
R
−55/R25
resistance ratio T
amb
= −55 °C and 25 °C 0.480 0.490 0.500
τ thermal time constant; note 1 in still air − 30 − s
in still liquid; note 2 − 5 − s
in flowing liquid; note 2 − 3 − s
rated temperature range −55 − +150 °C
1998 Mar 26 4
Philips Semiconductors Product specification
Silicon temperature sensors KTY81-1 series
Table 1 Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-110 and KTY81-120
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-110 KTY81-120
(°C) (°F) (%/K)
RESISTANCE
(Ω)
TEMP.
ERROR
(K)
RESISTANCE
(Ω)
TEMP.
ERROR
(K)
MIN. TYP. MAX. MIN. TYP. MAX.
−55 −67 0.99 475 490 505 ±3.02 470 490 510 ±4.02
−50 −58 0.98 500 515 530 ±2.92 495 515 535 ±3.94
−40 −40 0.96 552 567 582 ±2.74 547 567 588 ±3.78
−30 −22 0.93 609 624 638 ±2.55 603 624 645 ±3.62
−20 −4 0.91 669 684 698 ±2.35 662 684 705 ±3.45
−10 14 0.88 733 747 761 ±2.14 726 747 769 ±3.27
0 32 0.85 802 815 828 ±1.91 793 815 836 ±3.08
10 50 0.83 874 886 898 ±1.67 865 886 907 ±2.88
20 68 0.80 950 961 972 ±1.41 941 961 982 ±2.66
25 77 0.79 990 1000 1010 ±1.27 980 1000 1020 ±2.54
30 86 0.78 1029 1040 1051 ±1.39 1018 1040 1061 ±2.68
40 104 0.75 1108 1122 1136 ±1.64 1097 1122 1147 ±2.97
50 122 0.73 1192 1209 1225 ±1.91 1180 1209 1237 ±3.28
60 140 0.71 1278 1299 1319 ±2.19 1265 1299 1332 ±3.61
70 158 0.69 1369 1392 1416 ±2.49 1355 1392 1430 ±3.94
80 176 0.67 1462 1490 1518 ±2.8 1447 1490 1532 ±4.3
90 194 0.65 1559 1591 1623 ±3.12 1543 1591 1639 ±4.66
100 212 0.63 1659 1696 1733 ±3.46 1642 1696 1750 ±5.05
110 230 0.61 1762 1805 1847 ±3.83 1744 1805 1865 ±5.48
120 248 0.58 1867 1915 1963 ±4.33 1848 1915 1982 ±6.07
125 257 0.55 1919 1970 2020 ±4.66 1899 1970 2040 ±6.47
130 266 0.52 1970 2023 2077 ±5.07 1950 2023 2097 ±6.98
140 284 0.45 2065 2124 2184 ±6.28 2043 2124 2205 ±8.51
150 302 0.35 2145 2211 2277 ±8.55 2123 2211 2299 ±11.43
1998 Mar 26 5
Philips Semiconductors Product specification
Silicon temperature sensors KTY81-1 series
Table 2 Ambient temperature, corresponding resistance, temperature coefficient and maximum expected temperature
error for KTY81-121 and KTY81-122
I
cont
= 1 mA.
AMBIENT
TEMPERATURE
TEMP.
COEFF.
KTY81-121 KTY81-122
(°C) (°F) (%/K)
RESISTANCE
(Ω)
TEMP.
ERROR
(K)
RESISTANCE
(Ω)
TEMP.
ERROR
(K)
MIN. TYP. MAX. MIN. TYP. MAX.
−55 −67 0.99 471 485 500 ±3.02 480 495 510 ±3.02
−50 −58 0.98 495 510 524 ±2.92 505 520 535 ±2.92
−40 −40 0.96 547 562 576 ±2.74 558 573 588 ±2.74
−30 −22 0.93 603 617 632 ±2.55 615 630 645 ±2.55
−20 −4 0.91 662 677 691 ±2.35 676 690 705 ±2.35
−10 14 0.88 726 740 754 ±2.14 741 755 769 ±2.14
0 32 0.85 794 807 820 ±1.91 810 823 836 ±1.91
10 50 0.83 865 877 889 ±1.67 883 895 907 ±1.67
20 68 0.80 941 951 962 ±1.41 960 971 982 ±1.41
25 77 0.79 980 990 1000 ±1.27 1000 1010 1020 ±1.27
30 86 0.78 1018 1029 1041 ±1.39 1039 1050 1062 ±1.39
40 104 0.75 1097 1111 1125 ±1.64 1120 1134 1148 ±1.64
50 122 0.73 1180 1196 1213 ±1.91 1204 1221 1238 ±1.91
60 140 0.71 1266 1286 1305 ±2.19 1291 1312 1332 ±2.19
70 158 0.69 1355 1378 1402 ±2.49 1382 1406 1430 ±2.49
80 176 0.67 1447 1475 1502 ±2.8 1477 1505 1533 ±2.8
90 194 0.65 1543 1575 1607 ±3.12 1574 1607 1639 ±3.12
100 212 0.63 1642 1679 1716 ±3.46 1676 1713 1750 ±3.46
110 230 0.61 1745 1786 1828 ±3.83 1780 1823 1865 ±3.83
120 248 0.58 1849 1896 1943 ±4.33 1886 1934 1982 ±4.33
125 257 0.55 1900 1950 2000 ±4.66 1938 1989 2041 ±4.66
130 266 0.52 1950 2003 2056 ±5.07 1989 2044 2098 ±5.07
140 284 0.45 2044 2103 2162 ±6.28 2 085 2146 2206 ±6.28
150 302 0.35 2124 2189 2254 ±8.55 2167 2233 2299 ±8.55
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