HTS2030SMD - Temperature and Relative Humidity Sensor * 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 (1) and reflow processes Individual marking for compliance to stringent traceability requirements * Printers * 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 Ratings Operating Temperature Storage Temperature Supply Voltage (Peak) Humidity Operating Range Symbol Ta Tstg Value -60 to 140 -60 to 140 Unit C C Vs RH 10 0 to 100 Vac % RH Peak conditions: less than 10% of the operating time. HTS2030SMD HPC055_H www.meas-spec.com 1/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor ELECTRICAL CHARACTERISTICS (Ta=25C, measurement frequency @10kHz unless othe rwise noted) Humidity Characteristics Humidity Measuring Range Supply Voltage (1) Nominal Capacitance @55%RH Temperature coefficient Average Sensitivity from 33% to 75%RH Leakage Current (Vcc=5V) Recovery time after 150 hours of condensation Humidity Hysteresis Long Term Stability Time Constant (at 63% of signal, still air) 33%RH to 80%RH Deviation to typical response curve (10% RH to 90%RH) (1) Symbol RH Vs C Tcc C/%RH I tr Min 1 Typ 177 180 Max 99 10 183 0.01 0.31 1 10 +/-1 T +/-0.5 3 +/-2 5 Unit %RH V pF pF/C pF/%RH nA s %RH %RH/yr s %RH Tighter specification available on request Temperature Characteristics Nominal Resistance @25C Beta value: B25/100 Temperature Measuring Range Nominal Resistance Tolerance @25C Beta Value Tolerance Response Time Symbol R Ta RN Min 3600 -60 Typ 10 3730 2 3 10 Max 3800 140 3 Unit k C % % s TYPICAL PERFORMANCE CURVES HUMIDITY SENSOR * Polynomial Response C (pF)=C@55 %*( 3.903 10-8 *RH3-8.294 10-6 *RH2+2.188 10-3 *RH+0.898) HTS2030SMD HPC055_H www.meas-spec.com 2/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor * * 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*X3+1.0732 10+4*X2-1.0457 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. RT = RN x e RT RN T, TN e 1 1 T TN - NTC resistance in at temperature T in K NTC resistance in at rated temperature T in K Temperature in K Beta value, material specific constant of NTC 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 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 MEASFrance/Humirel Application Note HPC106 "Low power NTC measurement". HTS2030SMD HPC055_H www.meas-spec.com 3/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor * Temperature look-up table Temp Rout Max Dev Temp Rout Max Dev Temp Rout Max Dev Temp Rout Max Dev (C) -40 -39 -38 -37 -36 -35 -34 -33 -32 -31 -30 -29 -28 -27 -26 -25 -24 -23 -22 -21 -20 -19 -18 -17 -16 -15 -14 -13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 ( ) 262960 247217 232539 218845 206064 194110 182852 172332 162498 153299 144790 136664 129054 121925 115243 109030 103115 97565 92354 87460 82923 78581 74497 70655 67039 63591 60381 57356 54503 51813 49204 46767 44467 42296 40247 38279 36455 34731 33100 31557 () 35403 32777 30358 28130 26075 24178 22416 20791 19290 17905 16636 15444 14343 13325 12383 11516 10705 9953 9257 8612 8020 7463 6947 6468 6023 5606 5222 4865 4533 4225 3932 3662 3411 3177 2960 2756 2568 2393 2230 2078 (C) 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 ( ) 30029 28627 27299 26042 24852 23773 22708 21698 20739 19829 18959 18128 17338 16588 15876 15207 14569 13962 13384 12834 12280 11777 11297 10840 10404 10000 9600 9218 8853 8506 8178 7866 7568 7283 7011 6734 6484 6244 6015 5796 () 1932 1799 1675 1560 1452 1355 1261 1174 1093 1017 946 879 817 759 705 654 607 563 522 484 447 413 382 353 325 300 300 300 299 297 296 294 292 290 287 284 281 278 275 271 (C) 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 ( ) 5575 5373 5180 4995 4817 4636 4473 4316 4166 4021 3874 3737 3606 3481 3360 3237 3126 3019 2917 2819 2720 2629 2542 2458 2378 2304 2229 2158 2089 2022 1960 1898 1839 1782 1727 1673 1622 1573 1526 1480 () 267 264 260 257 253 248 245 241 237 233 229 225 221 217 213 208 204 200 197 193 189 185 182 178 175 171 168 165 161 158 155 152 149 146 143 140 138 135 132 130 (C) 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 ( ) 1432 1390 1349 1310 1272 1235 1199 1163 1130 1097 1067 1038 1009 982 955 927 901 877 853 830 () 127 124 122 119 117 115 112 110 108 106 104 102 100 98 96 94 92 90 89 87 HTS2030SMD HPC055_H www.meas-spec.com 4/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor * Steinhart-Hart coefficients According to the equation below, the Steinhart-Hart coefficients for the operating temperature range for HTS2030SMD thermistor are: 1 = a + b * ln( R ) + C * ln( R) * ln( R ) * ln( R) T NTC resistance in at temperature T in K Temperature in K Constant value (a= 9.94805E-04) Constant value (b= 2.46791E-04) Constant value (c= 1.10298E-07) R T a b c * 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 @25C to get: Vout = Vcc/2 @25C. 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 VCC (mV) VCC (mV) Rbatch 10k HTS2030SMD NTC 10k @25C VOUT (mV ) = HTS2030SMD HPC055_H HTS2030SMD NTC 10k @25C Rbatch 10k Vout (mV) Vcc(mV ) * NTC HTS 2030SMD () Rbatch () + NTC HTS 2030SMD () VOUT (mV ) = www.meas-spec.com 5/9 Vout (mV) Vcc(mV ) * Rbatch () Rbatch () + NTC HTS 2030SMD () October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor * Temperature conversion: look-up table (Vcc=5Vdc) Temperature Resistance Pull-Up Configuration Pull-Down Configuration (C) ( ) 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 1960 819 4181 80 1432 626 4374 90 1067 482 4518 99 830 383 4617 SUGGESTED FREQUENCY OUTPUT CIRCUITS CIRCUIT Note: R22=499k/ R4=49.9k/R1=1k/ RV1=50k 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 - HTS2030SMD HPC055_H www.meas-spec.com 6/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor 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(260C) + DI water clean at 45C 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 - 40C / +125C High Temperature / Humidity Operating Life - 93%RH / 60C for 1000 hours Low Humidity storage life - RH < 10%/23C for 1000 hours Resistance to immersion in water at ambient temperature and 80C High temperature storage 140C 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 MEASFrance/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 1 2 3 4 HTS2030SMD HPC055_H Function CTN1 CTN2 RH POT RH EMB www.meas-spec.com 7/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor Marking area 2030 xxxx Internal lot number Dimension A B C D E F G H L W X Y Z mm 6 0.25 10 0.25 2.7 0.2 0.8 0.1 2.54 0.1 13.6 0.1 0-10 0.2 0.05 0.15 0.1 2 0.25 3 0.25 2 0.25 6 0.25 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 Tel: +33 (0)5 820 822 02 Fax: +33(0)5 820 821 51 Sales: humidity.sales@meas-spec.com HTS2030SMD HPC055_H www.meas-spec.com 8/9 October 2012 HTS2030SMD - Temperature and Relative Humidity Sensor Revision D E F G H Comments Standardized datasheet format Humidity sensor characteristic drawing updated Package outline paragraph updated Steinhart-Hart equation and temperature interface circuit added, Pinout added New MEAS template, MEAS-France contact details updated Who D. LE GALL D. LE GALL D. LE GALL Date April 08 November 08 June 09 D. LE GALL July 09 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. HTS2030SMD HPC055_H www.meas-spec.com 9/9 October 2012 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: TE Connectivity: HPP804B130