technical data KK135Z integrated circuit of temperature sensor microcircuit KK135Z is precis ion temperature sensor with calibration capacity . microcircuit op erates as z e ner diod e with brak e down voltage being in direct proporti on to to absolute tem p erature (10 mv/ o k). full dynam i c resistance of the circuit is less than 1 hm at operation current 450 ...5 m . the se nsor calibrated at the tem p erature 25 o ,has typical error less than 1 o in the te mperature range above 100 o . the peculiarity of the ci rcuit KK135Z is the linear dependence of output voltage versus tem p erature. ic features calibration in o initial m easurem ent accuracy 1 o k range of operating supply current from 450 to 5 m full dynam i c resistance less than 1 hm packaged ic type: KK135Z, ? -26 bo tto m v i ew fi gure 1 - package pi n definitions figure 2 - circuitry kk 135z. 1
KK135Z able 1 - maximum ratings st andard nam e of param e t e r sy m bol mi n m a x un it o f m easurem ent ic current reverse direct i r i f - -- 15 10 ma air operation temperature: * - const a nt m ode - short-tim e t oper - 55 150 150 200 storage tem p erature t stg - 6 5 1 5 0 note - *t j 150 able 2 ? temperature parameters. st andard nam e of param e t e r sy m bol mi n ty pe m a x test condi t i ons tem p erature un it out put vol t a ge, v u out 2 , 9 5 2 , 9 8 3 , 0 1 i r = 1 m a 25 v non-calibrated tem p erature error ? 1 - 1 2 3 5 i r = 1 m a 25 -55 150 tem p erature error at calibration 25 ? 2 - 0 , 5 1 , 5 i r = 1 m a -55 150 calib rated erro r in ex ten d e d tem p erature range ? 3 - 2 - case = ma x per i odical -55 150 non-linearity of tem p erature characteristic ? 4 - 0 , 3 1 i r = 1 m a -55 150 able 3 ? electrical parameters. st a n d a r d nam e of param e t e r sy m bol m i n t y pe. m a x test condi t i ons tem p eratu re m easurem ent of out put vol t a ge i n suppl y current s range ? u out - 2 , 5 1 0 0,45 m i r 5 m -55 150 mv dy nam i c i m pedance ? r 1 - 0,5 - i r = 1 m 2 5 ohm tem p erature coefficient of output vol t a ge ? - +10 - - 25 mv / tim e co n s tan t: -still air -speed of ai r i s 0,5 m / - ag itated o il - - - 80 10 1 - - - - -55 150 tim e stab ility ? - 0,2 - - 125 / 1000 note ? precise m easurem ents done in agitated oil bath. for othe r conditions there should be taking into consideration self-heat ing . 2 KK135Z
change of reverse voltage, (m v) calibration error, ( ) reverse current, (m ) tem p erature , ( ) figure 3 ?reverse voltage versus reverse current figure 4 ? calibration error versus temperature reverse current, (m ) input and output voltage, (v) reverse voltage, (v) tim e , ( ?? ) figure 5 ? reverse current versus reverse voltage figure 6 ? output signal response time 3 KK135Z
direct dynam i c resistance , ( hm ) noise density (nv/ hz) frequency , (hz) frequency , (hz) figure 7 ? dynamic resistance versus frequency ?????? ????????? ?????? ? figure 8 ? noise voltage therm a l resistance, ( /w t) tim e constant, ( ) air m o tion speed, (m / ) air m o tion speed, (m / ) figure 9 ? thermal resistance versus air motion speed figure 10 ? time constant versus air motion speed 4 KK135Z
heat conduction , (%) heat conduction, (%) tim e , (m in) tim e , (m in) figure 11 ? time dependence of heat conduction in still air figure 12 ? time dependence of heat conduction in agitated oil direct voltage, (v) direct current, (m ) figure 13 ? dependence of direct voltage on direct current information for application . there is a sim p le technique of the devi ce calibration for im proving precision of tem p erature m easurem ent (see typical application circuits). calibration of the device occurs in one spot as the ic output voltage is proportional to absolute tem p erature with sensor voltage extrapolation to 0 v at 0 ( - 273,15 ). the errors in dependence of output voltage on temperature are determ ined onl y by characteristic in cline. therefore b i as calib ration at one tem p eratu r e corrects errors in the whole tem p erature range. output voltage of calibrated or non calibrated circuit m a y be derived from the following equation: v ot = vo to to t ; where ? unknown tem p erature; ? reference tem p erature (in ). 5 KK135Z KK135Z
nom i nally ic output calibrated to the value 10 m v / . to ensure m easurem ent precis ion they apply som e rules. degrad ation of the precision when s e lf- heating is proper to any devices of temperature s e nsors. the circu it should operate at low operating current but sufficient for controlling the sensor and its calibration circuit at m a ximum operating tem p erature. w h en using the sensor in the field with constant therm a l resistance, error when self-heating m a y be reduced by external calibration. it can be done at the circuit bias when applying tem p erature- stabilized current. thus heating will be proportional to zener diode voltage. in this case error when self-heating is proportional to absolute tem p erature as the error of scaling coefficient. typical application circuits. il 135 figure 14 ? basic circuit of temperature sensor il 1 3 5 ? 15 ? ??? ? ? ???? ?? ??? ? i l135 figure 16 ? temperature sensor w i th external calibration * i l13 5 figure 17 ? sequential sensor connection for increase of temperature bias voltage? 6 KK135Z
KK135Z figure 18 ? circuit of isolated temperature sensor KK135Z u cc =( 1 0 -3 0 ) b figure 19 ? temperature regulator 7 KK135Z
figure 20 ? thermal sensor w i th 100 0 scale * cal i b rati on for 2,7315 v on output of l m 308 kk 135z kk 135z figure 21 ? differential temperature sensor 8 KK135Z
thermo couple r 3 t h e r m o e l e c t r i c a l coefficient j 3 7 7 hm 52,3 v/ t 3 0 8 hm 42,8 v/ k 2 9 3 hm 40,8 v/ s 4 5 , 8 hm 6,4 v/ adjustment: compensation of sensor and resistor tolerances 1 sel ecti o n of 1n4568 2 adjustment of voltage drop on element r3 by the resistor r1 to obtain the value of thermoelectrical coefficient, multiplied by the ambient temperature (in k degrees). 3 sel ecti o n of 135z and adjustment of r2 for setting voltage drop on the element r3 according to thermocouple type j ? 14,32 mv k ? 11,17 mv t ? 11,79 mv s ? 1,768 mv kk1 35z figure 22 ? circuit of cold junction compensation (compensation for ground thermocouple) *value of r3 nominal for this thermocouple type thermo- couple r3 r4 hermoelectri cal coefficient j 1 0 5 0 hm 365 hm 52,3 v/ t 856 h m 3 1 5 hm 42,8 v/ k 8 1 6 hm 300 hm 40,8 v/ s 1 2 8 hm 46,3 hm 6,4 v/ adjustment: compensation of sensor and resistor tolerances 1 adjustment by the resi s tor r1 for obtai n i n g vol tage drop on the element r3, equal to thermoel ectrical coefficient multiplied by the ambient temperature (in k degrees) 2 adjustment of the resistor r2 for obtaining some voltage drop on the element r4 according to thermocouple type j ? 14,32 mv k ? 11,17 mv t ? 11,79 mv s ? 1,768 mv kk KK135Z figure 23 ? circuit of cold junction compensation w i th unipolar supply *value of r3 and r4 nomina ls for this thermocouple type 9 KK135Z
package dimensions t o -9 2 10 KK135Z
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