HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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• Miniature Surface mount SMD package
• Lead free component
• Patented solid polymer structure
• Suitable for linear voltage or frequency output
circuitry
• Fast response time and very low temperature
coefficient
DESCRIPTION
Based on a unique capacitive cell for humidity measurement and a Negative Temperature Coefficient
(NTC) thermistor for temperature measurement, this dual-purpose relative humidity / temperature miniaturized
sensor is designed for high volume, cost sensitive applications with tight space constraints. It is useful in all
applications where dew point, absolute humidity measurements or humidity compensation are required.
FEATURES APPLICATIONS
• Fulll interchangeability with no calibration
required in standard conditions • Automotive
•
Instantaneous desaturation after long periods in
saturation phase
•
Home Appliance
• Compatible with automatized assembly
processes, including Pb free wave soldering
and reflow processes
(1)
• Printers
•
Individual marking for compliance to stringent
traceability requirements
•
Meteorology
• Part may be washed with distilled water
(1) Soldering temperature profiles available on request / contact us at humidity.application@meas-spec.com
PERFORMANCE SPECS
MAXIMUM RATINGS
Peak conditions: less than 10% of the operating time.
Ratings
Symb
ol
Value
Operating Temperature Ta -60 to 140 °C
Storage Temperature Tstg -60 to 140 °C
Supply Voltage (Peak) Vs 10 Vac
Humidity Operating Range RH 0 to 100 % RH
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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ELECTRICAL CHARACTERISTICS
(Ta=25°C, measurement frequency @10kHz unless otherwise noted)
(1) Tighter specification available on request
TYPICAL PERFORMANCE CURVES
HUMIDITY SENSOR
• Polynomial Response
C (pF)=C@55 %*( 3.903 10
-8
*RH
3
-8.294 10
-6
*RH
2
+2.188 10
-3
*RH+0.898)
Humidity Characteristics
Symbol
Min
Typ
Max
Humidity Measuring Range RH 1 99 %RH
Supply Voltage Vs 10 V
Nominal Capacitance @55%RH
(1)
C 177 180 183 pF
Temperature coefficient T
cc
0.01 pF/°C
Average Sensitivity from 33% to 75%RH ∆C/%RH 0.31 pF/%RH
Leakage Current (Vcc=5V) I 1 nA
Recovery time after 150 hours of condensation tr 10 s
Humidity Hysteresis +/-1 %RH
Long Term Stability T +/-0.5 %RH/yr
Time Constant (at 63% of signal, still air) 33%RH to 80%RH τ 3 5 s
Deviation to typical response curve (10% RH to 90%RH) +/-2 %RH
Temperature Characteristics
Symbol
Min
Typ
Max
Nominal Resistance @25°C R 10 kΩ
Beta value: B25/100 β 3600 3730 3800
Temperature Measuring Range Ta -60 140 °C
Nominal Resistance Tolerance @25°C R
N
2 3 %
Beta Value Tolerance β 3 %
Response Time τ 10 s
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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• Typical Response Look-Up Table (polynomial reference curve) @10kHz/1V
RH (%) 0 5 10 15 20 25 30 35 40 45 50
Cp (pF) 161.6 163.6 165.4 167.2 169.0 170.7 172.3 173.9 175.5 177.0 178.5
RH (%) 55 60 65 70 75 80 85 90 95 100
Cp (pF) 180 181.4 182.9 184.3 185.7 187.2 188.6 190.1 191.6 193.1
• Reverse Polynomial Response
RH (%) = -3.4656 10
+3
*X
3
+1.0732 10
+4
*X
2
-1.0457 10
+4
*X+3.2459 10
+3
With X = C(read) / C@55%RH
TEMPERATURE SENSOR
• Typical Temperature Output
Depending on the needed temperature measurement range and associated accuracy, we suggest two methods
to access to the NTC resistance values.
R
T
NTC resistance in Ω at temperature T in K
R
N
NTC resistance in Ω at rated temperature T in K
T, T
N
Temperature in K
β Beta value, material specific constant of NTC
e Base of natural logarithm (e=2.71828)
The exponential relation only roughly describes the actual characteristic of an NTC thermistor can, however,
as the material parameter β in reality also depend on temperature. So this approach is suitable for describing a
restricted range around the rated temperature or resistance with sufficient accuracy.
For practical applications, a more precise description of the real R/T curve may be required. Either more
complicated approaches (e.g. the Steinhart-Hart equation) are used or the resistance/temperature relation as
given in tabulation form. The below table has been experimentally determined with utmost accuracy for
temperature increments of 1 degree.
Actual values may also be influenced by inherent self-heating properties of NTCs. Please refer to MEAS-
France/Humirel Application Note HPC106 “Low power NTC measurement”.
−
×=
N
TT
NT
eRR
11
β
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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• Temperature look-up table
Temp Rout Max Dev
Temp Rout Max Dev
Temp Rout Max Dev
Temp Rout Max Dev
(°C) ( Ω) (Ω)
(°C) ( Ω) (Ω)
(°C) ( Ω) (Ω)
(°C) ( Ω) (Ω)
-40 262960 35403
0 30029 1932
40 5575 267
80 1432 127
-39 247217 32777
1 28627 1799
41 5373 264
81 1390 124
-38 232539 30358
2 27299 1675
42 5180 260
82 1349 122
-37 218845 28130
3 26042 1560
43 4995 257
83 1310 119
-36 206064 26075
4 24852 1452
44 4817 253
84 1272 117
-35 194110 24178
5 23773 1355
45 4636 248
85 1235 115
-34 182852 22416
6 22708 1261
46 4473 245
86 1199 112
-33 172332 20791
7 21698 1174
47 4316 241
87 1163 110
-32 162498 19290
8 20739 1093
48 4166 237
88 1130 108
-31 153299 17905
9 19829 1017
49 4021 233
89 1097 106
-30 144790 16636
10 18959 946
50 3874 229
90 1067 104
-29 136664 15444
11 18128 879
51 3737 225
91 1038 102
-28 129054 14343
12 17338 817
52 3606 221
92 1009 100
-27 121925 13325
13 16588 759
53 3481 217
93 982 98
-26 115243 12383
14 15876 705
54 3360 213
94 955 96
-25 109030 11516
15 15207 654
55 3237 208
95 927 94
-24 103115 10705
16 14569 607
56 3126 204
96 901 92
-23 97565 9953
17 13962 563
57 3019 200
97 877 90
-22 92354 9257
18 13384 522
58 2917 197
98 853 89
-21 87460 8612
19 12834 484
59 2819 193
99 830 87
-20 82923 8020
20 12280 447
60 2720 189
-19 78581 7463
21 11777 413
61 2629 185
-18 74497 6947
22 11297 382
62 2542 182
-17 70655 6468
23 10840 353
63 2458 178
-16 67039 6023
24 10404 325
64 2378 175
-15 63591 5606
25 10000 300
65 2304 171
-14 60381 5222
26 9600 300
66 2229 168
-13 57356 4865
27 9218 300
67 2158 165
-12 54503 4533
28 8853 299
68 2089 161
-11 51813 4225
29 8506 297
69 2022 158
-10 49204 3932
30 8178 296
70 1960 155
-9 46767 3662
31 7866 294
71 1898 152
-8 44467 3411
32 7568 292
72 1839 149
-7 42296 3177
33 7283 290
73 1782 146
-6 40247 2960
34 7011 287
74 1727 143
-5 38279 2756
35 6734 284
75 1673 140
-4 36455 2568
36 6484 281
76 1622 138
-3 34731 2393
37 6244 278
77 1573 135
-2 33100 2230
38 6015 275
78 1526 132
-1 31557 2078
39 5796 271
79 1480 130
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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• Steinhart-Hart coefficients
According to the equation below, the Steinhart-Hart coefficients for the operating temperature range for
HTS2030SMD thermistor are:
)ln(*)ln(*)ln(*)ln(*
1RRRCRba
T
++=
R
NTC resistance in Ω at temperature T in K
T Temperature in K
a Constant value (a= 9.94805E-04)
b Constant value (b= 2.46791E-04)
c Constant value (c= 1.10298E-07)
• Temperature Interface circuit
Concerning the temperature sensor of the HTS2030SMD, the following measuring method described below is
based on a voltage bridge divider circuit. It uses only one resistor component (Rbatch) at 1% to design
HTS2230 temperature sensor interfacing circuit. Rbatch is chosen to be equal to NTC @25°C to get: Vout =
Vcc/2 @25°C. There are two proposal configurations: If Rbatch is connected to Vcc and NTC to Ground, it leads
to a negative slope characteristic (Pull-Down Configuration). For a positive slope, Rbatch and NTC resistors
have to be switched (Pull-Up Configuration).
Pull-Up Configuration Pull-Down Configuration
)()( )(*)(
)(
2030
2030
Ω+Ω Ω
=
SMDHTSbatch
SMDHTS
OUT
NTCR NTCmVVcc
mVV
)()( )(*)(
)(
2030
Ω+Ω Ω
=
SMDHTSbatch
batch
OUT
NTCR RmVVcc
mVV
Vout (mV)
HTS2030SMD
NTC 10k @25°C
Rbatch
10k
VCC (mV)
HTS2030SMD
NTC 10k @25°C
Vout (mV)
VCC (mV)
Rbatch
10k
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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• Temperature conversion: look-up table (Vcc=5Vdc)
SUGGESTED FREQUENCY OUTPUT CIRCUITS
CIRCUIT
Note: R22=499kΩ/
R4=49.9kΩ/R1=1kΩ/
RV1=50kΩ potentiometer/
C1=10nF/C2=2.2nF/C3=100nF
TYPICAL RESPONSE LOOK-UP TABLE (HUMIDITY OUTPUT)
RH (%) 0 5 10 15 20 25 30 35 40 45 50
Fout (Hz) - - 7155 7080 7010 6945 6880 6820 6760 6705 6650
RH (%) 55 60 65 70 75 80 85 90 95 100
Fout (Hz) 6600 6550 6500 6450 6400 6355 6305 6260 6210 -
Temperature
Resistance
Pull-Up Configuration
Pull-Down Configuration
(°C) ( Ω) Vout (mV) Vout (mV)
-40
262960
4817
183
-30 144790 4677 323
-20
82923
4462
538
-10 49204 4155 845
0
30029
3751
1249
10 18959 3273 1727
20
12280
2756
2244
25 10000 2500 2500
30
8178
2249
2751
40 5575 1790 3210
50 3874 1396 3604
60 2720 1069 3931
70
196
0
819
4181
80 1432 626 4374
90
1067
482
4518
99 830 383 4617
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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QUALIFICATION PROCESS
HTS2030SMD sensors have been qualified through a complete qualification process taking in account
many of the requirements of the JEDEC standard including:
Solder heat and solderability including lead free process
Pb free wave soldering and reflow soldering process(260°C) + DI water clean at 45°C
Mechanical shock JESD-22-B104-A
Vibration - Variable frequency (20 to 2000Hz) JESD-22-B103-A
Marking permanency
ESD - Electrostatic Discharge – Air Gun +-15kV(IEC 1000)
Salt Atmosphere JESD22-A107-A
Temperature Cycling - 40°C / +125°C
High Temperature / Humidity Operating Life - 93%RH / 60°C for 1000 hours
Low Humidity storage life - RH < 10%/23°C for 1000 hours
Resistance to immersion in water at ambient temperature and 80°C
High temperature storage 140°C for 168 hours
Resistance to many chemicals linked to home appliances/automotive or consumer
applications
ENVIRONMENTAL AND RECYCLING
HTS2030SMD sensors are lead free components and are compatible with Pb Free soldering processes.
HTS2030SMD sensors are free from Cr (6+), Cd and Hg.
SOLDERING INSTRUCTIONS
We recommend taking specific attention to soldering conditions to get the best performance of MEAS-
France/Humirel sensors. See Application Note. To get it, please contact: humirel.application@meas-spec.com
PACKAGE OUTLINE
HTS2030SMD GULL WING
(JLEAD OPTION ALSO AVAILABLE)
Pin Out Assignment
N° Function
1 CTN1
2 CTN2
3 RH POT
4 RH EMB
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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ORDERING INFORMATION
HPP804B130: TUBE M.P.Q OF 78 PIECES
HPP804B131: TAPE AND REEL M.P.Q OF 1500 PIECES
HTS2030SMD - TEMPERATURE AND RELATIVE HUMIDITY SENSOR
Sample kit of HTS2030SMD is available through MEASUREMENT SPECIALTIES web site:
http://www.meas-spec.com/humidity-sensors.aspx
Customer Service contact details
Measurement Specialties, Inc - MEAS France
Impasse Jeanne Benozzi
CS 83 163
31027 Toulouse Cedex 3
FRANCE
Tél: +33 (0)5 820 822 02
Fax: +33(0)5 820 821 51
Sales: humidity.sales@meas-spec.com
Dimension mm
A 6 ± 0.25
B 10 ± 0.25
C 2.7 ± 0.2
D 0.8 ± 0.1
E 2.54 ± 0.1
F 13.6 ± 0.1
G 0-10°
H 0.2 ± 0.05
L 0.15 ± 0.1
W 2± 0.25
X 3± 0.25
Y 2± 0.25
Z 6 ± 0.25
2030
xxxx
Internal lot number
Marking area
HTS2030SMD – Temperature and Relative Humidity Sensor
HTS2030SMD HPC055_H www.meas-spec.com October 2012
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Revision Comments Who Date
D Standardized datasheet format D. LE GALL April 08
E Humidity sensor characteristic drawing updated D. LE GALL November 08
F Package outline paragraph updated D. LE GALL June 09
G Steinhart-Hart equation and temperature interface circuit
added, Pinout added D. LE GALL July 09
H New MEAS template, MEAS-France contact details updated D. LE GALL-ZIRILLI October 12
The information in this sheet has been carefully reviewed and is believed to be accurate; however, no responsibility is assumed for
inaccuracies. Furthermore, this information does not convey to the purchaser of such devices any license under the patent rights to the
manufacturer. Measurement Specialties, Inc. reserves the right to make changes without further notice to any product herein. Measurement
Specialties, Inc. makes no warranty, representation or guarantee regarding the suitability of its product for any particular purpose, nor does
Measurement Specialties, Inc. assume any liability arising out of the application or use of any product or circuit and specifically disclaims
any and all liability, including without limitation consequential or incidental damages. Typical parameters can and do vary in different
applications. All operating parameters must be validated for each customer application by customer’s technical experts. Measurement
Specialties, Inc. does not convey any license under its patent rights nor the rights of others.
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Authorized Distributor
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