HTF3000LF - Temperature and Relative Humidity Module * Small size product * Compliant with RoHS recommendations and most of Lead Free Soldering Process * Humidity calibrated within +/-3% @55%RH at 5Vdc * Stable, proportional frequency output from 0 to 100% RH * High quality thermistor DESCRIPTION Based on the rugged HS1101LF humidity sensor, HTF3000LF is a dedicated humidity and temperature transducer designed for OEM applications where a reliable and accurate measurement is needed. It features a very small size for easy, cost-effective mechanical mounting. Direct interface with a micro-controller is made possible with the module's linear frequency output. FEATURES * One of the smallest humidity/temperature modules on the market Humidity Sensor Specific Features * High reliability and long term stability * Not affected by water immersion * * * * Stable characteristics with temperature Temperature Sensor Specific Features * Part could be washed with distilled water * * * * Instantaneous de-saturation after long periods in saturation phase Fast response time High resistance to chemicals Patented solid polymer structure 10k +/-1% NTC temperature sensor Stable High sensitivity APPLICATIONS * Printers * HVAC controller ... HTF3000LF HPC077 Rev I www.meas-spec.com 1/7 July 2008 HTF3000LF - Temperature and Relative Humidity Module PERFORMANCE SPECS MAXIMUM RATINGS Ratings Storage Temperature Storage Humidity Supply Voltage (Peak) Humidity Operating Range Temperature Operating Range Symbol Tstg RHstg Vs RH Ta Value -40 to 105 0 to 100 16 0 to 100 -40 to 85 Unit C % RH Vdc % RH C Peak conditions: less than 10% of the operating time. Operating Range Temperature in C ELECTRICAL CHARACTERISTICS (Ta=23C, Vs=5Vdc +/-5%, RL>1M unless otherwise stated) Humidity Characteristics Humidity Measuring Range Relative Humidity Accuracy (0 to 100% RH) Supply Voltage Nominal Output @55%RH (at 5Vdc) Current consumption (Max at 16Vdc) Supply Voltage Influence (3 to 7Vdc) Average Sensitivity from 10% to 95%RH Humidity Hysteresis Long Term Stability Time Constant (at 63% of signal, static) 40% to 95%RH, 2m/s Symbol RH RH Vs Fout Ic RH Fout/RH T Min Typ Max 0 100 Refer to Chart 2 on page 3 3 5 8 6560 6600 6640 0.18 1 +/-1 -10 -12 -14 +/-1 +/-0.5 10 Unit %RH %RH Vdc Hz mA % RH Hz/%RH %RH %RH/yr s (Ta=25C) Temperature Characteristics Nominal Resistance @25C Beta value: B25/100 Temperature Measuring Range Nominal Resistance Tolerance @25C Beta Value Tolerance Response Time HTF3000LF HPC077 Rev I Symbol R Ta RN www.meas-spec.com 2/7 Min 3346 -40 Typ 10 3380 1 1 10 Max 3413 85 Unit k C % % s April 2008 HTF3000LF - Temperature and Relative Humidity Module TYPICAL PERFORMANCE CURVES HUMIDITY SENSOR * Relative Humidity Accuracy of HTF3000LF @23C * Modeled Signal Output Equation Fout = 7314 - 16.79*RH + 0.0886*RH - 0.000358*RH3 Fout in Hz and RH in % * Modeled Reversed Output Equation RH = 89.8*10-10*Fout3 - 15.7486*10-5*Fout + 0.80945*Fout - 1009 Fout in Hz and RH in % * Typical response look-up table RH (%) 1 5 10 15 20 25 30 35 40 45 50 Fout (Hz) 7295 7230 7155 7080 7010 6945 6880 6820 6760 6705 6650 RH (%) 55 60 65 70 75 80 85 90 95 99 Fout (Hz) 6600 6550 6500 6450 6400 6355 6305 6260 6210 6170 Output Voltage wave form HTF3000LF HPC077 Rev I www.meas-spec.com 3/7 April 2008 HTF3000LF - Temperature and Relative Humidity Module * Temperature influence on HTF3000LF humidity measurement Calibration data are traceable to NIST standards through CETIAT laboratory. For demanding application, temperature coefficient could be compensated over operating temperature range using following formula: RHcorr = RH + 0.08 * ( T - 25 ) Fout Corr = Fout - 0.88 * ( T - 25 ) T in C, RH in %, Fout in Hz 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 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) c 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. d 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 Application Note HPC106-0 "Low power NTC measurement". HTF3000LF HPC077 Rev I www.meas-spec.com 4/7 April 2008 HTF3000LF - Temperature and Relative Humidity Module Temperature Look-up Table Temp Resistance Max Deviation (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 0 1 195652 184917 174845 165391 156513 148171 140330 132958 126022 119494 113347 107565 102116 96978 92132 87559 83242 79166 75316 71677 68237 64991 61919 59011 56258 53650 51178 48835 46613 44506 42506 40600 38791 37073 35442 33892 32420 31020 29689 28423 27219 26076 7921 7378 6874 6407 5974 5571 5197 4849 4527 4226 3947 3687 3446 3221 3011 2815 2633 2463 2305 2157 2019 1890 1770 1658 1553 1454 1363 1277 1197 1121 1051 985 923 865 810 759 712 667 625 586 549 514 HTF3000LF HPC077 Rev I Temp Resistance Max Deviation () () (C) 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 40 41 42 43 24988 23951 22963 22021 21123 20267 19450 18670 17926 17214 16534 15886 15266 14674 14108 13566 13049 12554 12081 11628 11195 10780 10382 10000 9634 9284 8947 8624 8315 8018 7734 7461 7199 6948 6707 6475 6253 6039 5834 5636 5445 5262 482 452 423 396 371 348 326 305 285 267 250 233 218 204 190 178 166 154 144 134 125 116 108 100 100 100 100 99 99 98 98 97 96 95 94 93 92 91 90 89 88 87 Temp Resistance Max Deviation (C) () () 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 80 81 82 83 84 85 5086 4917 4754 4597 4446 4301 4161 4026 3896 3771 3651 3535 3423 3315 3211 3111 3014 2922 2834 2748 2666 2586 2509 2435 2364 2294 2228 2163 2100 2040 1981 1925 1870 1817 1766 1716 1669 1622 1578 1535 1493 1452 www.meas-spec.com 5/7 86 85 83 82 81 80 79 77 76 75 74 73 72 70 69 68 67 66 65 64 63 62 60 59 58 57 56 55 54 53 52 52 51 50 49 48 47 46 46 45 44 43 Temp Resistance Max Deviation (C) () () 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 1413 1375 1338 1303 1268 1234 1202 1170 1139 1110 1081 1053 1026 999 974 949 925 902 880 858 837 816 796 777 758 740 722 705 688 672 656 640 625 611 596 583 569 556 544 531 42 42 41 40 39 39 38 37 37 36 35 35 34 34 33 32 32 31 31 30 30 29 29 28 28 27 27 26 26 25 25 24 24 23 23 23 22 22 22 21 April 2008 HTF3000LF - Temperature and Relative Humidity Module QUALIFICATION PROCESS RESISTANCE TO PHYSICAL AND CHEMICAL STRESSES * * * HTF3000LF has passed through qualification processes of MEAS-France including vibration, shock, storage, high temperature and humidity. Additional tests under harsh chemical conditions demonstrate good operation in presence of salt atmosphere, SO2 (0.5%), H2S (0.5%), 03, NOx, NO, CO, CO2, Softener, Soap, Toluene, acids (H2SO4, HNO3, HCI), HMDS, Insecticide, Cigarette smoke, this is not an exhaustive list. ESD: HTF3000LF is able to sustain a minimum of +/-8kV (contact discharge). PACKAGE OUTLINE HTF3000LF PVH Dim A B C D E F K Min 17.9 12.0 10.7 14.25 4.80 1.76 0.54 Max 18.9 13.0 11.7 14.95 5.40 3.76 0.74 Dimensions in millimeters RECOMMENDED THROUGH HOLE FOOTPRINT HTF3000LF HPC077 Rev I www.meas-spec.com 6/7 April 2008 HTF3000LF - Temperature and Relative Humidity Module SOLDERING INFORMATION HTF3000LF PVH: Hand soldering or wave soldering ORDERING INFORMATION HPP808H031 FOR HTF3000LF PVH STORAGE: TUBE M.Q.P OF 48 PARTS; BOX M.Q.P OF 1008 PARTS (21 TUBES) Customer Service contact details Measurement Specialties, Inc. 105 av. du General Eisenhower BP 23705 31037 TOULOUSE CEDEX 1 FRANCE Tel: +33 (0) 561 194 848 Fax:+33 (0) 561 194 553 Sales: humidity.sales@meas-spec.com Revision E F G H I Comments Mechanical dimension tolerances updated, Typical voltage supply changed into 5V (instead of 3.3V) HTF3000LF RL reference added, product storage quantities added Mechanical dimension tolerance updated Soldering information paragraph updated, chart2 improved (poor image), HTF3000LF SMD and HTF3000LF RL references removed Standardized datasheet format Who Date D. LE GALL August 07 D. LE GALL November 07 D. BEZ December 07 D. LE GALL January 08 D. LE GALL April 08 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. HTF3000LF HPC077 Rev I www.meas-spec.com 7/7 April 2008