chipcap g features ? simultaneous relative humidity and temperature outputs ? precision accuracy 2% rh, 0.6c ? resolution 0.4% rh ? factory selectable analog or digital outputs ? output con? gurations available: voltage 0v to 1v 10 to 90% of vdd zacwire tm digital output (8-bit humidity) ? factory calibrated, ready to use ? designed for automated assembly ? supply voltage: 3.0v to 5.5v ? low quiescent current: 0.5ma@5v, 25c ? sop 14 package applications ? hvac controls 3 humidistats 3 enthalpy control 3 indoor air quality (iaq) 3 humidi? ers 3 dehumidi? ers ? instrumentation 3 portable instruments 3 data loggers and recorders 3 weather stations ? medical 3 nebulizers 3 oxygen air 3 cpap/sleep apnea devices ? automotive 3 cabin climate control 3 defrost control ? appliances and white goods ? oem assemblies available the fully calibrated humidity and temperature solution ge sensing & inspection technologies
chipcap 3 the fully calibrated humidity and temperature sensor the chipcap series humidity sensor by ge o : ers a new standard in the ? eld of accurate relative humidity measurement. based on a capacitive polymer sensing technology, this device o : ers signal conditioning and temperature compensation for a single soc (systemon- chip) solution. the device is very simple to use, fully tested and calibrated for accuracy on delivery 3 no further calibration is needed. chipcap can be incorporated into an assembly or ? nished sensor to meet customer speci? cations. the measurement is accurate to 2% from 20% to 80% rh and 3% across the entire humidity range. long term stability is excellent. the temperature accuracy is 1c from 0c to +70c. dual outputs provide humidity and temperature as 0v to 1v, or 0.5v to 4.5v ratiometric or available with digital output (the zacwire one-wire interface). accurate, repeatable humidity and temperature measurement chipcap provides either analog or digital interfaces on a single, 5vdc-powered chip. the package is highly resistant to chemical vapors and other contaminants. chipcap sensors are precalibrated and o : er high interchangeability. they also fully recover from condensing environments and may be used across a wide range of both temperature and relative humidity ranges. chipcap relative humidity sensors change capacitance in direct proportion to ambient relative humidity. an internal solid-state band gap provides temperature measurement. this integral design reduces overall cost and complexity and improves reliability. small, integrated package for automated assembly chipcap contains the entire signal conditioning circuitry on a single silicon die. the sensor and circuitry are integrated into a small footprint soc to save board real estate. chipcap is shipped in tube packaging for automated insertion on surface mount technology (smt) circuit boards. tape and reel packaging is available upon request for high volume applications. 9.5 0.07 mm 6.00 0.02 mm 3.22 0.10 mm out-rh nc nc v+ nc nc nc nc nc nc gnd nc nc nc 1 2 3 4 5 6 7 14 13 12 11 10 9 8 v 3v to 5.5v gnd 0.1 supply c chipcap rh sensor digital interface out-rh nc nc v+ nc nc nc nc nc nc gnd nc nc nc 1 2 3 4 5 6 7 14 13 12 11 10 9 8 rh output temp output v 3v to 5.5v gnd 0.1 supply chipcap rh sensor analog interface linear mode: %rh = vout * 100 tc = vout * 200 -50 ratiometric mode: %rh = ((vout - (0.1 * vsupply))/(0.8 * vsupply)) * 100 tc = ((vout - (0.1 * vsupply))/(0.8 * vsupply)) * 200 - 50
chipcap speci? cations relative humidity rh sensor planar capacitive polymer rh range 0 to 100% rh rh accuracy @ 25c 2% from 20% to 80% 3% from 0% to 20% and 80% to 100% rh resolution 0.4% rh temperature temperature sensor integral band gap ptat temperature scale -50c to 150c temperature accuracy 0.6c at 25c (see graph below) temperature resolution 0.2c -4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0 -40-200 25507085 temperature error (c) maximum error maximum error t yp ical error power supply reverse polarity protection 12.5 vdc, 100 ? a (15vdc, 60s) voltage supply 3 to 5.5 vdc current supply 500 microamps @ 5 vdc, 25c outputs rh voltage output (ratiometric) vout = (vsupply/5)(0.5+(.04*rh)); 0.5 to 4.5v ratiometric; 5vdc nom. rh voltage output (linear, 0-1v) vout = 0.01(rh) rh digital output manchester 8-bit encoded temperature voltage output (ratiometric) vout = (vsupply/5)(1.5 + (.02*tc)); 0.5 to 4.5v ratiometric; 5vdc nom. temperature voltage output (linear) vout = (0.005t c) +0.25 temperature digital output manchester 10-bit encoded
? 2008 general electric company. all rights reserved. speci? cations are subject to change without notice. ge is a registered trademark of general electric company. other company or produ ct names mentioned in this document may be trademarks or registered trademarks of their respective companies, which are not a ; liated with ge. g www.gesensinginspection.com environmental operating temperature range -40c to 85c operating rh range 0 to 100 % rh, non-condensing packaging packaging SOP-14, smd soldering ir solder re? ow, 260c, 10 sec pin connection 4 pin; +v, gnd, rhout, tout 920-426b absolute maximum ratings symbol parameter min. max. units notes vdd dc supply voltage -0.3 6 v vio voltage at all analog and digital i/o pins -0.3 vdd + 0.3 v ta ambient temperature (operation) -50 -40 150 85 c c asic rh sensor tstrg storage temperature -55 150 c tj junction temperature -55 160 c recommended operation conditions symbol parameter min. type max. units notes vdd analog dc supply 3 5 5.5 v idd supply current 550 ? a 25c vss analog ground 0.0 v to ambient temperature -40 27 85 c cvdd external capacitance between vdd and vss 100 220 470 nf c ld digital output load (only capacitive, no resistive) 100 pf c la analog output load capaictance 5nf r la analog output load resistance 5k ? model part description chipcap-l chipcap rh and temperature sensor, 0-1vdc linear output chipcap-r chipcap rh and temperature sensor, 0.5- 4.5vdc ratiometric output (5vdc nominal) chipcap-d chipcap rh and temperature sensor, digital output - - ordering information
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