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tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 1 i 2 c h umidit y an d t emperatur e s enso r f e atures ? precision r e lative h u m i dity s e nsor ? ? 5% rh (max), 0 C 80% rh ? hi g h acc u ra c y t e m p e r a t ure se n s o r ? ? 1 c (max), C 10 to 8 5 c ? 0 to 1 00% rh op e rating ra n g e ? C 40 to + 1 25 c oper a t i ng range ? wi d e o p e r a t i n g v o l t age (1.9 t o 3.6 v) ? l o w p o w e r c o nsumption ? ? 1 5 0 a active current ? ? 6 0 na s t an d by current appli c ations ? h v ac/r ? thermos t a t s/humidis t a t s ? resp i rat o ry ther a p y ? wh i t e g oods ? i n do o r w e a t h e r s t a t i o n s d es c ri p tion ? facto r y - calibrated ? i 2 c inter f ace ? int e grated o n - c h ip he a t e r ? 9.1 mm x 10.8 mm s mt module ? excell e nt l ong term s t ab i lity ? o p t i onal factory - ins t al l ed cover ?? low - profile ?? pr o t e c ti o n duri n g r e f l ow ?? excl u des li q ui d s a n d p a r ticul a t es ? micro - env i ronmen t s/da t a c e nters ? automotive climate control a n d defo g gi n g ? asset a n d go o ds tracki n g ? mob i le ph o nes and t ab l e t s TH06: 9.1mm x 10.8 mm smt module the TH06 i2c humidity and temperature s ensor is a monolithic cmos ic integrating humidity and temperature sensor elements, an analog - to - digital converter, signal processing, calibration data, and an i2c interface. the patented use of industry - standard, low - k polymeric dielectrics for sensing hu midity enables the construction of low - power, monolithic cmos sensor ics with low drift and hysteresis, and excellent long term stability. the humidity and temperature sensors are factory - calibrated and the calibration data is stored in the on - chip non - vol atile memory. this ensures that the sensors are fully interchangeable, with no recalibration or software changes required the TH06 is reflow solderable. it can be used as a hardware - and software - compatible drop - in upgrade for existing rh/ temperature sens ors , featuring precision sensing over a wider range and lower power consumption. the optional factory - installed cover offers a low profile, convenient means of protecting the sensor during assembly (e.g., reflow soldering) and throughout the life of the p roduct, excluding liquids (hydrophobic/oleophobic) and particulates. the TH06 offers an accurate, low - power, factory - calibrated digital solution ideal for measuring humidity, dew - point, and temperature, in applications ranging from hvac/r and asset trackin g to industrial and consumer platforms.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 2 1. electrical s p ecifications unle s s otherwise s pecified, all m i n / max spe c ificatio n s apply over the r e com m ended operating conditions. t able 1. recom m ended operati n g conditions parameter symbol t e st condition min t yp m a x unit power supply v dd 1.9 3 .6 v ope r atin g t e mp e rat u r e t a C 4 0 +125 c t a ble 2. general s p ecific a tions 1.9 < v dd < 3 . 6 v ; t a = C 4 0 to 1 2 5 c d e fault conversi o n time u n less otherw i se n o ted. parameter symbol t est cond i tion m in t y p m ax unit input v ol t age h igh v ih scl, sda p i n s 0.7x v dd v inp u t v ol t age low v il scl, sda p i n s 0.3x v dd v in p u t v o l t a ge r a n ge v in s c l, sda pins w ith respect t o g n d 0 . 0 v dd v i n p u t l e a k a g e i il scl, sda p i n s 1 a output v o l t age l o w v ol sda pin; i o l = 2.5 m a; v dd = 3 .3 v 0 . 6 v sda pin; i o l = 1 . 2 m a ; v dd = 1 .9 v 0 . 4 v current c o n s u mp ti o n i dd r h co nv ersi on i n p r og r ess 1 5 0 180 a t e mp e ra tu r e c o n v e r si o n in p r o g r e ss 9 0 12 0 a s t a n d b y , C 40 t o + 85 c 2 0 . 06 0 . 6 2 a s t a n d b y , C 4 0 t o +12 5 c 2 0 . 06 3 . 8 a p eak idd during poweru p 3 3 . 5 4 . 0 ma p e a k id d d u ri n g i 2 c operation s 4 3 . 5 4 . 0 ma a f ter writing t o u s er registers 5 2 0 a h e a t er c u r r e n t 6 i he a t 3.1 ma not e s: 1 . i n itiating a rh me a s u rement will a l so a u tomatical l y i n itiate a t e m p erature measur e m e n t. t h e t o t a l co n version time will b e t c o nv (rh) + t co n v (t ) . 2. no conv e r s i on or i 2 c tra n sact i on in pr o g ress. t y p ical val u es m e asured at 25 c. 3. occurs once d u ring p o werup. d u ra t ion is <5 ms e c. 4. occurs d u ring i 2 c c o mma n ds f o r r e set, r e ad/ w r i t e u ser reg i sters, read eid, and r ead firmware v e rsio n . d u rat i on is < 1 00 s when i 2 c clock speed is >100 khz (>200 khz f o r 2 - b yte comman d s). 5. i d d a f ter a user register write. initi a ti n g any other subse q ue n t i 2 c t r a n s a cti o n on t h e sa m e b u s (s u ch as t h e u s e r reg i ster rea d , s t a rti n g an rh measur e m e n t, or tra f fic dir e cted a t other i 2 c dev i ces) w i ll tr a n sition the d e vice to s t and b y mode. 6. add i ti o nal curre n t cons u m p t i on wh e n htre bit en a ble d . se e section 5.5. heater f o r more i n f o rm a t i o n
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 3 t a ble 2. general s p ecific a tions (contin u ed) 1.9 < v dd < 3 . 6 v ; t a = C 4 0 to 1 2 5 c d e fault conversi o n time u n less otherw i se n o ted. parameter symbol t est cond i tion m in t y p m ax unit c o n v e r si o n t i me 1 t co n v 12 - bi t rh 1 0 12 ms 1 1 - bit rh 5 . 8 7 10 - bit rh 3 . 7 4.5 8 - bit rh 2 . 6 3 . 1 1 4 - b it t e mp e ra tu r e 7 1 0 . 8 1 3 - b it t e mp e ra tu r e 4 6 . 2 1 2 - b it t e mp e ra tu r e 2 . 4 3 . 8 1 1 - b it t e mp e r a t u r e 1 . 5 2 . 4 pow e ru p t i me t pu f r o m v dd 1.9 v t o ready for a c o n v e r si o n, 25 c 1 8 25 ms f r o m v dd 1. 9 v t o r e a d y fo r a c o n - ve r si o n, f u ll t e mp e r a t u r e r a n g e 80 a f t er iss u in g a so f t wa re r e s et c o mm a nd 5 15 not e s: 1 . i n itiating a rh me a s u rement will a l so a u tomatical l y i n itiate a t e m p erature measur e m e n t. t h e t o t a l co n version time will b e t c o nv (rh) + t co n v (t ) . 2. no conv e r s i on or i 2 c tra n sact i on in pr o g ress. t y p ical val u es m e asured at 25 c. 3. occurs once d u ring p o werup. d u ra t ion is <5 ms e c. 4. occurs d u ring i 2 c c o mma n ds f o r r e set, r e ad/ w r i t e u ser reg i sters, read eid, and r ead firmware v e rsio n . d u rat i on is < 1 00 s when i 2 c clock speed is >100 khz (>200 khz f o r 2 - b yte comman d s). 5. i d d a f ter a user register write. initi a ti n g any other subse q ue n t i 2 c t r a n s a cti o n on t h e sa m e b u s (s u ch as t h e u s e r reg i ster rea d , s t a rti n g an rh measur e m e n t, or tra f fic dir e cted a t other i 2 c dev i ces) w i ll tr a n sition the d e vice to s t and b y mode. 6. add i ti o nal curre n t cons u m p t i on wh e n htre bit en a ble d . see section 5.5. heater f o r more i n f o rm a t i o n t able 3. i 2 c i nterface s p e cificat i ons 1 1.9 v dd 3.6 v ; t a = C 40 to + 1 25 c unl e ss oth e rwise note d . p a ram e t er s ymb ol t e s t condi t i on min t y p max u nit hysteresis v h ys high - to - l o w v ersus low - to - hi g h t r a n si t ion 0.05 x v dd v scl k f r eq u enc y 2 f scl 400 khz sc l hig h t i m e t skh 0.6 s sc l l ow t ime t skl 1.3 s s t art hold t i m e t sth 0.6 s not e s: 1 . all val u es a re r e f e renced to v il a nd/or v i h . 2. de p end i ng on the conv e r s i on command, t h e th 0 6 m a y h o ld t he mast e r d u ring the conv e rs i on (clock stretch). at ab o ve 1 0 0 khz scl, the th 0 6 may also h o ld t h e m a st e r br i ef l y for user register and d e vice id trans a c ti o n s. at the hi g hest i 2 c s p eed of 400 khz t h e stretchi n g will b e < 1 0 s. 3. pulses up to and i n clu d ing 50 n s w i l l be sup p r e ssed.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 4 t able 3. i 2 c i nterface s p e cificat i ons 1 (c o ntinue d) 1.9 v dd 3.6 v ; t a = C 40 to + 1 25 c unl e ss oth e rwise note d . p a ram e t er s ymb ol t e s t condi t i on min t y p max u nit s t a rt s e t up t i me t sts 0.6 s s t o p s e t up t i me t s p s 0.6 s bu s f r e e t i m e t buf b e twe en s t op a nd s t art 1 .3 s sda setup t ime t ds 100 ns sda hold t i m e t dh 100 ns sda v a lid t i me t vd;d a t f ro m sc l l ow t o da t a v a lid 0 . 9 s sda acknowledge v a lid t i m e t vd;ack f ro m sc l l ow t o da t a v a lid 0 . 9 s sup p r e ssed pulse wi d t h 3 t s p s 50 ns not e s: 1 . all val u es a re r e f e re nced to v il a nd/or v i h . 2. de p end i ng on the conv e r s i on command, t h e th 0 6 m a y h o ld t he mast e r d u ring the conv e rs i on (clock stretch). at ab o ve 1 0 0 khz scl, the th 0 6 may also h o ld t h e m a st e r br i ef l y for user register and d e vice id trans a c ti o n s. at the hi g hes t i 2 c s p eed of 400 khz t h e stretchi n g will b e < 1 0 s. 3. pulses up to and i n clu d ing 50 n s w i l l be sup p r e ssed. 1 /f s c l t s k h t s p t s k l scl t b u f t s th t d s t dh t s p s sda d 7 d 6 d 5 d 0 r / w a c k s t a r t b i t s t o p b i t t s ts t v d : ack fi g u re 1. i 2 c interface t iming di a gram
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 5 t a ble 4. hu m idity sens o r 1.9 v dd 3.6 v ; t a = 30 c; d e fault conversi o n t i me u n less otherw i se n o ted. par a me t e r s y m bol t e s t con d i t i on min t y p m ax u n it ope r atin g r a ng e 1 non - condensing 0 1 0 0 %rh accurac y 2, 3 0 C 80% rh 4 5 %rh 80 C 1 0 0 % rh se e fi gu re 2 repea t ability/no i s e 12 - bit resolution 0.025 %rh rms 1 1 - bit resolution 0 .05 1 0 - b it r e s o lu t i o n 0 .1 8 - bit resolution 0 .2 response t im e 4 63% 1 m / s a ir f low 18 s d r i f t v s . t e mp e r a t u r e 0 . 0 5 % r h/ c hysteresis 1 %rh long t erm s t abilit y 3 < 0.25 % rh/ y r not e s: 1 . recomme n ded h u m i dity o perati n g r a nge is 2 0 % to 8 0 % r h (n o n - con d ensi n g) over C 10 c to 6 0 c . prol o nged op e rat i on b e y o nd these ran g es m a y res u lt in a sh i f t o f sens o r re a d in g , with slow rec o very time. 2. exclud e s hy steres i s , lo n g term dri f t, and cer t ain oth e r factors a nd is ap p lica b le to n on - co n dens i ng envir o n men t s o n l y . see section 4.1. rel a tive h u m i dity s e nsor acc u racy for m o re d e t a ils. 3. dri f t due to ag i ng e f f e c t s a t t y p i cal r o om con d itions of 30 c a nd 3 0 % to 50% rh. may b e im p a cted by d u st, v a poriz e d solve n t s or other con t amin a n t s, e.g., out - gassi n g t a pes, a dhes i v e s, p a cka g ing materi a ls, etc. see s e cti o n 4 . 7 . l o ng t e rm dri f t/aging . 4. resp o n se t i me to a st e p chan g e in rh. t i me for the rh output to c h ange b y 6 3 % of the to t a l rh c h an g e.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 6 fi g ure 2. rh accuracy at 30 c
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 7 t a ble 5. t emperature se n sor 1.9 v dd 3.6 v ; t a = C 40 to + 1 25 c defau l t conv e r s i on t i me u n l e ss oth e r w ise noted. par a me t e r s y m bol t e s t con d i t i on min t y p m ax u n it ope r atin g r a nge C 40 + 1 25 c accurac y 1 C 10 c < t a < 85 c 0 .5 1 c C 40 < t a < 1 25 c f i g u re 3 repea t abili ty/no i s e 14 - bit resolution 0 .01 c r m s 1 3 - b it r e s o lu t i o n 0 . 0 2 1 2 - b it r e s o lu t i o n 0 . 0 4 1 1 - bit resolution 0 .08 response t im e 2 63% un m ou n t ed d e vice 0.7 s th 0 6 - e b b o a r d 5.1 s long t erm s t ability 0.01 c/yr not e s: 1 . 14b me a surement resol u ti o n (defau l t). 2. t ime to re a ch 63% of fi n a l val u e in respo n se to a step cha n ge in temperatur e . act u al respo n se time w i ll vary de p en d ent o n system t h ermal mass a nd air - flo w .
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 8 figure 3 . t emperature ac c uracy
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 9 t a ble 6 . abs o lute maximum ratings 1 par a me t e r s y m bol t e s t con d i t i on min t y p max unit am bi en t tem p er at ure u nd er bi as C 55 1 2 5 c s t o r ag e t e mp e r a t u re C 65 1 5 0 c v ol t age on i/o pins C 0.3 vdd+0.3v v v o l t ag e o n vd d with respe c t t o gnd C 0.3 4 . 2 v esd t o l e rance h b m 2 kv cdm 1 . 2 5 kv mm 2 5 0 v not e s: 1 . absol u te max i m u m ratin g s are stress r a t i ngs onl y , oper a t i o n at o r b e yond these co n d itio n s is n o t impl i ed and may shorten the life of the d e vice or alter i t s p e rforma n ce.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 10 2. t y pical a pplication circui t s t he p r im a r y f u nct i o n o f th e th 0 6 i s t o m e asu re r e lat i v e h u midit y a n d t e mp e ratu r e . fi g ur e 4 d e mo n str a t es the typical application circuit to achi e v e these functio n s. 1 . 9 t o 3 . 6 v 0 . 1 f 1 0 k ? 1 0 k ? 5 v d d t h 0 6 s c l 6 s d a 1 s c l s d a g n d 2 figure 4 . typ i c a l app l ica t ion circuit f o r relat i v e h u midi ty an d t e mpe r at ur e m e as u reme nt
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 11 3. bill of materials t a b le 7 . t ypi c al applic a tion circuit bom for relati v e humidity and t emp e r a tu re me a surement re f er e nce d e sc r i p tion mf r p a r t number m an u fa c t ur er r1 resi s to r , 10 k ? , 5% , 1/1 6 w , 0 603 cr0 6 03 - 1 6 w - 1 0 3jt v e n k el r2 resi s to r , 10 k ? , 5% , 1/1 6 w , 0 603 cr0 6 03 - 1 6 w - 1 0 3jt v e n k el c1 c a p acit o r , 0. 1 f , 1 6 v , x7r , 0 6 03 c 0 60 3 x7r16 0 - 1 04m v e n k el u1 ic, digi t al t e mperature/humidity sensor TH06c hoperf
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 12 4. functional description v dd th 06 humidity sensor temp sensor 1.25v r ef a d c c a l ib r a t ion m e m o r y co n t rol lo g i c i 2 c int e r f a ce sda scl g n d figure 5. th 06 blo c k diagra m t he th 0 6 is a d i g i t al r el a ti v e hu mi d ity a n d t e mp e r a t u r e sensor that integrates tem p e r atu re a nd h u midit y s e nsor el em e n t s, a n a n al o g - t o - di gi t a l conve r te r , sign a l p r o c e ssin g , calib r atio n, p o ly n om i a l n o n - lin e a ri t y c o r r ection , an d an i 2 c interface all in a s i n g l e chip. the th 0 6 is individ u ally facto r y - calibr a te d fo r bot h te m pe r atu re a nd h u midit y , wit h th e cali b r a ti on d a t a st o r ed i n o n - chi p no n - vol atile memor y . this ensures that the s ensor is fully i n t e rch a ng e a b le , wit h n o r ecalib r atio n or cha n ge s t o s o f t wa re r e q u ire d. pate nt e d us e o f ind u st r y - s t an d a rd c m os and lo w - k dielectri c s as a sen s or enables the th 0 6 to a c hieve e x cellent long term s t ability and immunity to con t aminan t s with low dri f t and hysteresis. the th 0 6 o f f e r s a l ow p owe r , hig h acc u r a c y , cali b r a t ed a nd s t able sol u ti on id e a l f or a wid e r an ge o f t e mp e rat u re , h u m idit y , and dew - point applications inclu d i n g medical and in s trumen t ation, high reliability automotive and industr i al s y stems, and cost - sen si tive consumer electroni c s. w h i l e the th 0 6 is l a r g e l y a c o n v e n ti o n a l m ix ed - si gn al cmos integrated cir c uit, relati v e humidity sensors i n g en e r al a n d th o s e b ase d on c a p a citiv e sensin g us in g p o ly m e ric di el ectric s h av e uni q u e a pplic a ti on an d u s e r e q uir e me n t s th at a re n ot co m mo n t o conv e ntion al ( n o n - s e nso r) ics . c h ie f a mo ng t h os e a r e: ? ? t h e n e e d t o p r otec t t he s e nso r d u ri n g b oa rd assem b l y , i.e. , sol d e r r eflo w , an d t he ne ed t o s u bse q ue n tly r eh yd ra te t h e s e ns o r . ? ? t h e n e e d t o p r otec t t he s e no r f r o m d am a g e o r c o n t a min a ti on du r in g t he p r od u c t lif e - cyc l e . ? ? th e im p ac t o f p r ol on g e d exp o s u r e t o extr e me s of t e mp e r a t u r e a n d/o r h u midit y a nd th eir pote n ti al e f fec t on sen s or accurac y . ? ? t h e e f fec t s of h u mid i t y s e nso r m e mo r y . e a ch of t he se it e ms i s d i s c u s s e d in more de t a il in the following s e c tions.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 13 4.1. relative humid i ty s e nsor accuracy t o d e t e r m i n e t he a cc u r a cy of a r el a ti v e hu mi d ity s e ns o r , i t i s place d i n a te m pe r a t u re a n d h umi di t y cont r olled cha m be r . the temperature is set to a con v e n ient fixed value (typically 25 C 30 c) and the relative humidi t y is s w ept fr om 2 0 t o 8 0 % a n d b a c k t o 2 0% i n th e followi n g ste p s : 2 0% C 4 0% C 60 % C 80 % C 80 % C 60 % C 40 % C 2 0% . at each set - point, the c hamb e r i s all o w ed t o settl e f or a p e ri od o f 6 0 mi n ute s b e f o r e a r e a di ng i s t a k en fro m t he sen s o r . prior to the s w eep, the devi c e i s allo w ed to s t abilize to 50% r h. the s olid trace in figure 6 , measuring sensor accuracy includi n g hysteresis, shows the result of a typical s w eep. figure 6. measuring sens o r accur a cy including hysteresis t he r h acc u r a c y i s defi n e d a s th e d ott ed lin e show n i n fig u r e 6, whic h i s t h e ave r ag e of t he tw o d a t a p oi n t s at e a ch r e l a tive h um idi t y s e t - p o in t . in this case, the sensor shows an a c cur a cy of 0.25%rh. the th 0 6 a c curacy spe c ification ( t able 4) includes: ? ? u n i t - t o - u n i t a n d lo t - t o - l o t v a ri a ti o n ? ? accuracy of fac t ory c alibration ? ? m a r g in f o r s h i f t s t ha t c an o cc u r d u ri n g s o l d er r e fl o w the accur a cy spe c ification does not i n c l u d e: ? ? hystere s i s (typically 1%) ? ? e f fec t s fr om lon g t e r m ex p osu re t o ve ry h umi d c o n ditio n s ? ? c o n t a mi na ti o n of t h e s e ns o r by p a r t i c u l a t es, c he m i c al s , e tc. ? ? other aging related shi f t s ("long - term s t ability " ) ? ? v a riations due to temperature ( s ee d ri f t vs. t e mperature in t able 4). rh read i ngs will typically v ary w ith tem p e r atu re b y les s th a n 0.0 5 % c .
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 14 4.2. hysteresis the moi s ture absorbent film (polymeric diele c tri c ) of the humidity sen s or will c arry a memory of i t s exposure hi s tor y , p articularly i t s recent or extreme e x posure histor y . a sen s or e x posed to relativ e ly low humidity will c a rry a negative o f fset relati v e to the fa ct ory calibration, and a s ensor exposed to relatively high humidity will carry a positive o f f s et relati v e to t h e factory calibration. this f a c t or causes a hy s teresis e f fect illustrated by the s o l i d tra c e in fi gu re 6 . t he h ys t e r e s i s v a l u e is t h e d i f f e r e n ce in %rh between the maxim u m a b solute e r r o r on the decreasing h umi di t y r a m p a nd t he m a xi m u m a b s o lut e e r r or o n th e i n cr e asin g h u mid i t y r a m p a t a si n gl e r el a tiv e h u midity setpoint and is expressed as a bipolar quantity r e lative t o th e ave r ag e e r ro r ( dash ed tr a c e ) . i n th e e x a mpl e of fi g u re 6 , t he me a s u r e me nt u n cer t ai nt y d u e to the hysteresis e f fect is 1.0%rh. 4.3. pr o l on g ed exposure to high humidity prolonged e x posure to high humidity w i l l result in a gradual up w ard dri f t of the rh reading. the shi f t in sensor reading r e s u l t i n g from this dri f t w ill generally disappear slowly und e r normal ambient c on d itions . th e amoun t of shi f t is proportional to the magnitude of r e lative h u m i dity a n d t he l e n g th of e x p o s u r e . in t h e c a s e o f l e n g t h y e x p o s u re t o hi g h h u m i d it y , s o m e o f t h e r e s u lti n g s h i f t ma y persist ind e finitely under typical con d ition s . it is generally pos s i b l e to s ubs t a ntially r e ve r s e t h i s a f fec t by b a ki ng th e d e v i c e (s e e secti on 4 .6 . b a k e /hyd r at e pr o c e du r e ). 4.4. p cb as s em b ly 4 . 4 . 1. s o l d er i ng li k e m o s t ics , th 0 6 d e vic es a re s h ip p e d fr om th e f a cto ry vacuu m - p acke d wit h an encl o s ed desicc a n t t o avo i d a n y r h accu r ac y d r i f t d u ri ng sto r ag e a n d t o p r e v e n t a ny m o istu r e - r el ate d iss u e s d u ri n g s o ld er refl o w . t h e following g u i d eli n es s ho uld b e o b s e r v ed d u r ing p c b a ss em bl y : ? ? th 0 6 device s a r e c o m p atibl e wit h s t a nd a r d b o a r d a s sembly pro c e s se s . d e v i c e s should be soldered u si ng r e fl ow p e r th e r eco m me n de d ca rd r eflo w p r o fil e. s ee s e cti on 1 0 . pc b la nd patt e r n a n d s o lder m a s k desig n f or th e r ecom m en d e d ca rd r e flo w p r o fil e. ? ? a "n o cle a n " s o ld er p r oces s i s r e c o mm e nd ed t o minim i z e t h e n ee d f or w a t e r or s o lv en t r in s es a f t er sol d e r ing . cl e a ni n g a f t er sold e ri ng i s p o ssi b le , b u t must be done car e fully to a v oid im p a cting the p erf o rm a nc e o f t h e s e nso r . ? ? it is essential that the e x p o sed p o l y m e r sensing film be kept clean and undamaged. this can be a c com p l i s h e d by car e ful handling and a clean, well - c ont r olle d ass e mbl y p r ocess . whe n i n do u b t or for extra protection, a heat - resis t ant, protective cover such as kap t on? kppd - 1/8 poly i m ide t ape can be in s t all e d d ur i n g pcb a s s e m b l y . th 0 6 m a y b e o r de r e d wit h a fact o ry - fitted , sol d e r - r esi s t ant protective cove r . this cover provid e s p r o t e c tion d u ri n g pc b ass e mbl y or r e w o r k b u t witho u t th e ti me a n d e f fort r equir e d to i n s t all a n d r e m o v e the kapton t ape. it c a n b e le f t in pl a ce f o r t he l i f e ti m e of t h e p r o du ct, p r e v e n t in g li q ui d s , d u s t o r oth er con t a min a n t s f r o m c o min g i n to co n t ac t wit h th e p o ly m e r s e nso r fil m. s ee sectio n 8. or d e ri n g gui d e f or a lis t of o r d e ri ng p a rt nu m be rs t h at in c lude the cove r . 4 . 4 . 2. r eh y d ra t i o n the measured humidity value will generally shi f t slightly a f ter solder reflo w . a portion of this s hi f t is permanent and i s acco u nte d f or i n th e acc u r a c y s pe c i f i c a ti o ns i n t a ble 4 . a f t er s ol de ri n g, a n th 0 6 s h o u l d be all o w e d t o equilibrate under contr o lled rh c onditions (room temperature, 45 C 5 5 % r h) for at lea s t 48 hours to eliminate the r e maind e r of the shi f t and r e turn the devi c e t o i t s s p ecifi ed accu r ac y p e rfo r m a nce.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 15 4.5. pr o t ecting the sensor bec a us e th e senso r o p e r ate s o n th e p r i n ci p al o f m e asu r in g a ch a ng e i n c a p a ci t a nce , a ny c h a n ge s t o t he di el ectric con s t ant of the polymer f i l m will be dete c ted as a change in relat i v e humidit y . therefore, it is impor t ant to minimize the probability of c on t a minan t s coming into con t act with the senso r . dust and o t her p a rti c les as we l l as liquids can a f fec t th e r h r ea d in g. i t i s r e c o mm e nd ed th at a cove r i s e m ploye d i n t he e nd syst em tha t bl ock s co n t ami n a n t s b u t all o ws w a t er v a p o r t o p a ss th ro u g h. d e p e n d i n g o n t he n ee ds of t he a pplicatio n , t h i s c an b e a s simpl e a s pl a sti c or me t a llic gau z e for b a s i c protection against p a rti c ulates or something m o re sophisti c ated s uch as a h y drophobic membr a ne providi n g up to ip67 compliant protection. t he th 0 6 ma y b e o r d e re d wit h a f a cto r y - fitt e d , sol d e r - r esis t an t c o v er t h a t c an be le f t i n pl ac e f or th e lifetim e of th e p r o duct . i t i s ve ry l o w - p r ofile , hyd r op h obi c a nd ol e o ph o b i c , and exclu d es p a r t i c ulates d o wn to 0.35 m i c r o n s in siz e . s e e s e cti o n 8 . o r d e r ing g ui d e f o r a li s t o f o r d e r ing p a rt n um b e rs t h at in c l u d e t he c o v e r . a di me n s io ne d d r a wi ng o f th e i c wit h t he c o v er i s incl u de d i n sectio n 9 . package ou tline . o ther c harac t e r i s t i c s of the cover are listed in t a ble 8 . t a ble 8 . s pecific a tions of prote c tive cov e r parameter v alue m a t e ri al e p t f e w a t e r e n t r y p r e ss u re 2 . 7 b a r pore s i z e 0.35 ope r atin g t e m pe r atu re C 4 0 t o 1 25 c m a xi m u m reflo w t e mp e r a t u r e 26 0 c oleo p ho b icit y (a a t c c 1 1 8 - 19 9 2) 7 ip ra t ing (per iec 529) i p 6 7 4.6. bake/hydrate procedure a f te r exp o s u r e t o ex tr e me s of te m pe r atu re a n d / or h um i di t y fo r p r ol o ng ed p e ri ods , t he p olyme r se n s or fil m can become ei t her very dry or very wet, in e a ch case the r e sult is either high or low r e lative humidity reading s . under normal operating condition s , the induced error will diminish o v er time. from a very dry condition, such as a f ter shipment and soldering, the error will diminish over a few days at typical controlled ambient condit i ons, e.g., 48 h ou rs of 45 %r h 55. h oweve r , from a very wet c ondition, recovery may t a ke s ign i f i c a n t l y longe r . t o a c celerate r ecove ry fr om a w et co n dition , a ba k e a n d hyd r at e cycl e ca n be impl e me n t e d. t h is operation consis t s of the f o llo w i n g s t e p s: ? ? baking the sensor at 125 c for 1 2 h o u rs ? ? hydration at 30 c in 7 5 % rh for 10 h o u rs follo wing th i s cycle, the sensor wi l l r e turn to normal o peration in typical ambie n t con d itions a f ter a few d a ys. 4.7. long t erm dri f t / aging o v er lo n g p e r io d s o f ti me , t h e s e n s or r e a d i n gs ma y d ri f t d u e t o a g in g o f th e devi c e . s t a n da rd acc e le r ate d life testing of the th 0 6 h a s r e sulted in the specific a tions for lon g - te rm d ri f t s h ow n i n t a bl e 4 a nd t a bl e 5 . this c o n t ri b u t ion to t he o ve ra ll s e n s or a c c u r a cy ac c o un t s o nly f o r t he l o n g - t e r m a g i n g of t h e de vice in an o t h e r w i s e b eni g n o pe r atin g e n viro n me nt an d d o e s n ot inclu d e th e e f fec t s o f d a ma g e , con t a min a t i on , or e x p osu re t o ext r eme e n vi r o nm e n t a l c o n d iti on s.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 16 5. i 2 c i nt e rf a c e t he th 0 6 com m unicat es wit h th e hos t co nt rol l e r ov er a di gi t al i 2 c interfa c e. the 7 - bit b a se s l a v e address i s 0 x 4 0 . t a ble 9 . i 2 c s l a v e a dd re s s b y te a 6 a 5 a 4 a 3 a2 a1 a0 r/w 1 0 0 0 0 0 0 0 mas t er i 2 c d evice s c o mm u nicat e wit h th e th 0 6 usin g a c o mm a n d str u ct u re . t he com m an ds a r e liste d i n th e i 2 c co m ma nd t a bl e 10 . c o mma n d s oth er tha n t h os e d ocum e nte d b e low are undefin e d a n d should not be sent t o the devi c e. t a ble 1 0 . i 2 c com m and t able comman d de s crip t i on c o mman d code m e asu re relativ e humi d i t y , h o l d m a ste r mo de 0xe5 m e asu re relativ e humi d i t y , n o h o l d maste r m ode 0 x f5 m e asu re t em p e r atur e, hol d m ast er m o de 0xe3 m e asu re t em p e r atur e, n o hol d m a st er mo de 0 x f3 r e ad t e mp e r a t u r e v a l u e f r o m p r evi ou s r h me as ur e me nt 0 xe0 reset 0xfe w r i t e rh/t user register 1 0 xe6 read r h/t u s er register 1 0 xe7
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 17 5.1. issuing a meas u rement command t he m eas u re m en t co m ma n d s instr u c t t he th 0 6 t o p e rfo rm o n e o f tw o p os s i b l e m eas u re m en t s ; rel a tiv e h u midity or t em p e r atu r e . th e p r oce d ur e t o iss ue a ny on e o f t h e s e co m ma n d s i s i d e n tical . whil e t he m e asu r em e n t i s in p r o g ress, the option of either c l o c k s t r e tching ( h old m ast er mo d e ) o r no t ack n owled g in g r e a d r e qu e s t s (no hold m a st er mo d e ) i s avail a bl e t o indic a t e t o th e m a ste r t h a t th e m eas u re m en t i s i n p ro g r e ss ; t he c h ose n co m ma nd co de d e t e rmi n e s w h ic h m od e i s use d. optionall y , a checksum b y t e can be r e turned from the s lave f o r u s e in c h e c ki n g f or t r a n s m issi o n e r r o r s . th e che c ksum b y t e will fol l ow the least s i g n ificant measurement byte if it is ac k nowled g ed by the maste r . the c h e c ks u m b y t e is n ot r e t u r n e d if t he m a s t er n ot a ck no wl e d g e s t h e l e a s t si g ni f ica n t me as ur e me nt b yt e . th e che c ksum byte is calculated u s ing a cr c ge n e r a to r p olyn o mia l o f x 8 + x 5 + x 4 + 1, w ith an initialization of 0x00. t he c h e c ks u m by t e is o p ti o n a l a f t er ini t ia t ing an rh or te m pe r atu re m easu r e m en t wit h com m an ds 0x e 5, 0xf5, 0 xe 3, a nd 0xf3 . fo r al l oth er c o mm a nds , t he c h ecks um byt e i s n ot sup p o r t e d. ma s t er slave sequenc e t o perform a m e asu r em e n t an d r e ad ba c k resu l t (hol d ma s te r m o d e ) s slave address w a measure cm d a sr slave address r a clock stretc h durin g measuremen t m s byt e a ls byt e na p a checksum na p
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www. hoperf.com 18 sequence t o perform a m easu r em e nt and r e ad ba c k resu l t (no ho l d m as t er mode) s slave address w a measure c m d a sr slave address r na slave address r na slave address r a m s byte a ls byte na p a checksum na p
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 19 %rh = C 6 5 . 1 . 1. m e as ur i n g r el at i v e h u m i d ity onc e a r el a tiv e h umi di t y m e asu r em e n t ha s b e e n m ad e, t he r e s u l t s of t he me as ur e me nt m a y b e co nv ert ed to p e r c e n t r e l a t i v e h u midity by using the following expression: w h e r e: 1 2 5 ? rh _ code - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6 5 5 3 6 %rh i s the measured relat i ve humidity value in % r h rh_co d e i s th e 1 6 - b i t wo rd r e tur n e d by th e th 06 a humidity measu r ement w ill al w ays return xxxxxx10 in the lsb field. due to normal variations in rh a c cur a cy of the d e vice as de sc ri b ed i n t a bl e 4 , i t i s p oss i bl e fo r th e me a s u r ed value of %rh to be slightly less than 0 when the actual rh level i s clos e t o or e q ua l t o 0 . simil a rl y , t he me as ur ed val ue of %r h ma y b e sli g htl y g r e ate r t h a n 1 0 0 w h e n th e act u a l r h leve l i s cl o s e t o o r eq u a l t o 1 00 . t h i s i s exp e ct ed b eh a vi o r , an d i t i s a cce p t ab l e t o limi t th e r a ng e o f r h r esul t s t o 0 t o 1 0 0%r h i n t he h os t s o f t w a r e b y t r uncating values that a r e slig h t l y ou t s ide of this range. 5 . 1 . 2. m e as ur i n g t em pe ra tu r e eac h tim e a r elativ e h umi di t y m e asu r em e n t i s m ad e a t e m p e r atu re m e asu r em e n t i s al s o ma de fo r t he p u r p ose s of te m pe r atu re c o mp e nsatio n o f t he rel a tiv e h u mi di t y m ea s urement. if the temperature value i s required, it can be r e ad using command 0xe0; this avoi d s h a ving to per f o rm a secon d t e mp e ratu re m e a su r em e nt . t he me as ure temperature commands 0xe3 and 0 x f3 will perform a temperature mea s urement and return the measurement val u e , comm a n d 0xe 0 d o e s n ot p e r f o r m a me as ur e me nt bu t r etur ns t he tem p e r atu re val ue m e asu r e d d u ri n g the r e la t ive h u m i d ity me a s u r e me n t . t he checks um o u t p u t i s n ot a v ail a bl e wit h t he 0xe 0 com m an d. sequence t o read temperature v alue f rom previous rh measurement s slave address w a 0xe0 a sr slave address r a m s byte a ls byte na p
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www. hoperf.com 20 temperatur e ( c ) = C 4 6 . 8 5 t he r esul t s o f th e te m pe r atu re m e asu r em e n t ma y b e c o nve r te d t o te m pe r atu re i n de g r e e s c e lsi us (c ) usin g t he following expression: 1 75.72 ? t e mp _ c o d e - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6 5 5 3 6 w h e r e: t e m pe r atu re ( c ) i s th e m e asu r e d te m pe r atu re valu e i n c t e m p _ c o d e is the 1 6 - b it word r e turned by the th 0 6 a temperature measurement will al w a y s return xxxxxx00 in the lsb field.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 21 5.2. reading and w r iting user registers t h e re i s o ne u s er r e gi st er on th e th 0 6 th at allow s th e us e r t o s et t he co n fi g u r atio n o f t h e th 0 6 . th e p r oce d u re fo r acc e ssin g t h a t r e gi ste r i s d esc ri b ed bel o w . t he checks um byt e i s n ot su p po r te d a f t er r e adi n g a use r r e gist e r . sequen c e to read a register s s l a v e ad d r e ss w a r e ad r e g c md a sr sl a ve a d dress r a r e ad data na p se quen c e to w r i te a register s s l ave ad d ress w a w r i t e r e g cmd a w r i te data a p 5. 3 . firmware revision t he inte r n al fi r mwar e revisio n ca n b e r e a d wit h th e followi n g i 2 c t r a n s a c tio n: s sla v e ad d r e ss w a 0x84 a 0 x b8 a s sl a ve a d dress r a f w r e v a na p 5.5. heater t he th 0 6 con t ai n s a n inte g r a t ed r e s i stiv e he a ti ng el e me nt tha t ma y b e u s ed t o r ais e th e tem p e r atu re o f t he se n s o r . thi s el e me nt ca n b e u s ed t o t e s t t he s e nso r , t o d r iv e o f f con d e n s a ti o n , or t o impl e me nt d e w - p o int meas ureme n t when the th 0 6 i s u s ed in conju n ction with a se p a r a te temperature sen s or such as anoth e r th 0 6 (the heater w i l l rai s e the temperature of the internal tempera t ure sen s or). the heater can be activated using h tr e , bit 2 in user register 1. t urning on t he heater w ill reduce the tendency of th e h u mi di t y s e nso r t o a ccu m ulat e a n o f fse t d ue to "me m ory" of sus t ained high humidity conditio n s.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www. hoperf.com 22 6. control register t a b le 1 1 . re g ister summ a r y r egister bit 7 bit 6 b i t 5 b i t 4 b i t 3 b it 2 b it 1 bit 0 user regist er 1 res1 vdds rs v d r s vd rsvd htre rsvd res0 not e s: 1 . a n y r e gister not l isted here is reserved a nd must n o t be w r itten. the res u lt of a read o p eration o n th e se b i t s is un d efine d . 2. except w here note d , reserved r e gister b i t s w i l l alw a ys read b a ck a s 1 , and are n o t a f fected by write op e r a t i o n s . f o r f u t u re c o m p atibi l it y , it is recommen d ed that p rior to a write o p e r atio n , reg i sters sho u ld be rea d . then the val u es r e ad fr o m the rsvd bi t s sh o u ld b e w ritten b a ck u n cha n ged d u ring the write op e rat i on. 6.1. register descriptions r e g i s t er 1. u s er r e g i st er 1 b i t d7 d6 d5 d4 d3 d 2 d 1 d0 n a me res1 vdds rsvd r s vd rsvd htre rsvd res0 t y p e r /w r r/w r/w r/w r/w r/w rese t setti n g s = 0 0 1 1 _ 1 010 bit name fun c tion d7; d0 r e s [ 1 : 0 ] measure m ent resol u tion: r h t e mp 0 0: 1 2 bit 1 4 b it 0 1: 8 b it 1 2 bit 1 0: 1 0 bit 1 3 bit 1 1 : 1 1 bi t 1 1 bit d 6 vdds v d d s t atus: 0 : v d d ok 1 : v dd low th e mi ni mu m r e comm e n d e d op e r a ti ng v o l t ag e i s 1. 9 v . a t r a n si - tio n o f t he vd d s t atu s bi t f r o m 0 t o 1 in di c a t es th at vd d is between 1.8 v a nd 1 . 9 v . if the vdd d r o p s below 1 . 8 v , the de v ice will no longer operate c orrectl y . d5, d 4, d3 rsvd reser v ed d2 h t re 1=o n - chi p h e ate r en a ble 0=on - c h i p heater disable d1 rsvd reserved
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 23 7 . ordering guide t a ble 1 2 . d e vice ordering guide p / n descri p ti o n m a x. a c cu r a c y pkg o p erati n g range (c) protective c o v e r packing f o rm a t t e m p rh th 0 6 dig i t al temp e rat u re/ h u midity s e nsor C industrial te m p range 1 c 5% smt module C 40 to +1 2 5 c y t u b e n o t e : t h e a d e notes prod u ct revisi o n a a n d 1 0 den o t e s firmware versi o n 1 . 0 .
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www. hoperf.com 24 8 . pin descriptio n s pin name pin # pin desc r iption vdd 1 1 powe r . t h i s pin is connected to p o wer on the circuit board. s da 2 i 2 c d a t a scl 3 i 2 c clock gnd 4 gro u n d. t h i s pi n i s con n ecte d t o g r ou nd o n the cir c uit board t hrough a trace. do not connect directly to gnd plane.
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www.hoperf.com 25 9 . package outline d i m e n s i o n m i n n o m m a x a 2 . 6 2 . 7 2 . 8 b 8 . 0 8 . 1 8 . 2 c 1 . 7 1 . 8 1 . 9 d 9 . 1 e 1 0 . 8 f 0 . 7 0 . . 8 0 . 9 g 1 . 6 1 . 8 2 . 0 h 1 . 7 1 . 8 1 . 9 i 0 . 7 0 . 8 0 . 9 not e s: 1 . all dimensions are shown in mill i m e ters (mm ) .
tel:+86 - 755 - 82973805 fax: +86 - 755 - 82973550 email:sales@hoperf.com http://www. hoperf.com 26 hope microelectronics co.,ltd add: 2/f, building 3, pingshan private enterprise science and techn ology park, lishan road, xili town, nanshan district, shenzhen, guangdong, china tel: 86 - 755 - 82973805 fax: 86 - 755 - 82973550 email: sales@hoperf.com website: http://www.hoperf.com http://www.hoperf.cn this document may contain preliminary information and is subject to change by hope microelectronics without notice. hope microelectronics assumes no responsibility or liability for any use of the information contained herein. nothing in this document shall operate as an express or implied license or indemnity u nder the intellectual property rights of hope microelectronics or third parties. the products described in this document are not intended for use in implantation or other direct life support applications where malfunction may result in the direct physical harm or injury to persons. no warranties of any kind, including, but not limited to, the implied warranties of mechantability or fitness for a articular purpose, are offered in this document. ?2006, hope microelectronics co.,ltd. all rights reserved.

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