functions pif (picture intermediate frequency) amplifier quasi-synchronous detector aft with defeat terminal video amplifier agc (automatic gain control) circuit tuner agc output noise canceller features reduced 920-khz beats and cross-color improved differential gain (dg) and differential phase (dp) minimized external components minimum level of forward agc output voltage adjusted by external resistors 1 HA11440A, ha11442a color tv picture if system
absolute maximum ratings (ta = 25?) item symbol rating unit ?????????????????????????????????????????????????????????????????????????????????????????????????????????????- supply voltage v cc 15 v - ???????????????????????????????????????????????? mean level of maximum i o 4 ma output current at pin 1 - ???????????????????????????????????????????????? power dissipation (ta = 65?) p t 745 mw - ???????????????????????????????????????????????? operating temperature t opr ?0 to +65 ? - ???????????????????????????????????????????????? storage temperature t stg ?5 to +125 ? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????- electrical characteristics (ta = 25?, unless otherwise specified) item symbol min typ max unit test conditions ?????????????????????????????????????????????????????????????????????????????????????????????????????????????- supply current 1 i s1 27.0 39.0 51.3 ma v 1f = 0 - ???????????????????????????????????????????????? supply current 2 i s2 27.0 40.0 51.3 ma v 1f = 80 db - ???????????????????????????????????????????????? input sensitivity v in 35 40 45 db the input voltage at which the video output goes down by 1 db - ???????????????????????????????????????????????? maximum input voltage v in(max) 93 98 db the input voltage at which the video output voltage varies by 5% - ???????????????????????????????????????????????? video bandwidth f c 6.0 7.5 mhz the frequency at which the video output voltage goes down by 3 db - ???????????????????????????????????????????????? video output level v out 1.98 2.32 2.65 v p-p m = 0.875 - ???????????????????????????????????????????????? sync tip voltage v sync 5.20 5.60 5.90 v - ???????????????????????????????????????????????? noise canceller starting v nc 1.20 1.50 1.80 v voltage - ???????????????????????????????????????????????? differential gain dg 8 12 % m = 0.875, 5% chroma added, dsb signal inputted - ???????????????????????????????????????????????? differential phase dp 2.5 6 deg. m = 0.875, 5% chroma added, dsb signal inputted - ???????????????????????????????????????????????? agc charging time t c 350 500 ? input signal constant modulated with square wave - ???????????????????????????????????????????????? agc disharging time t d 14 28 ms input signal constant modulated with square wave - ???????????????????????????????????????????????? vertical interval distortion v ver 50 100 mv p-p - ???????????????????????????????????????????????? minimum rf agc voltage v tr(min) 0 0 1.0 v v 1f = 85 db - ???????????????????????????????????????????????? 3 HA11440A, ha11442a HA11440A, ha11442a
electrical characteristics (cont) item symbol min typ max unit test conditions ?????????????????????????????????????????????????????????????????????????????????????????????????????????????- maximum rf agc voltage v tr(max) 11.00 11.70 11.95 v v 1f = 65 db - ???????????????????????????????????????????????? signal-to-noise ratio sn 49 52 db v 1f = 80 db? cw input signal - ???????????????????????????????????????????????? noise limited sensitivity v sn 48 52 db - ???????????????????????????????????????????????? pif input resistance r i 12 1.80 k w at pin 12 - ???????????????????????????????????????????????? pif input resistance r i 13 1.80 k w at pin 13 - ???????????????????????????????????????????????? pif input capacitance c i 12 3.0 pf at pin 12 - ???????????????????????????????????????????????? pif input capacitance c i 13 3.0 pf at pin 13 - ???????????????????????????????????????????????? video output resistance r out 30 w - ???????????????????????????????????????????????? aft quiescent voltage v m1 5.25 6.52 7.55 v no input signal - ???????????????????????????????????????????????? dc output voltage at aft v m2 6.45 6.52 6.59 v defeat on - ???????????????????????????????????????????????? aft detection sensitivity 180 230 khz/10v if sweep signal input - ???????????????????????????????????????????????? aft hold range (high) f ah 1.0 1.8 3.5 mhz if sweep signal input - ???????????????????????????????????????????????? aft hold range (low) f al ?.5 ?.8 ?.0 mhz if sweep signal input - ???????????????????????????????????????????????? maximum aft voltage v a max 11.00 11.60 11.95 v if sweep signal input - ???????????????????????????????????????????????? minimum aft voltage v a min 0.05 0.30 1.00 v if sweep signal input - ???????????????????????????????????????????????? time constant at agc t l 110 220 440 ? lock prevention circuit - ???????????????????????????????????????????????? gain attenuation v at 0 2 5 db rf stage gain of the tuner attenuated - ???????????????????????????????????????????????? thermal deviation of ddl t ? 0 6 db t a = ?0? to delay point +65? - ???????????????????????????????????????????????? thermal deviation of dvo t ? 0 5 % t a = ?0? to video output +65? ?????????????????????????????????????????????????????????????????????????????????????????????????????????????- 4 HA11440A, ha11442a HA11440A, ha11442a
d i f f e r ential gain (dg) and diff e r ential phase (dp) connect a vectorscope to point a before measuring, as in figure 39. agc charging time constant ( t c ) and a g c discharging time constant ( t d ) measure the waveform at point d by synchroscope. see figure 40. m i n i m um rf agc v o l t a ge (v tr min ) and maximum rf agc voltage (v tr max ) adjust vr1 for 75 db?of the delay point and measure the voltage at point c. see figure 41. signal to noise ratio (sn) connect an ac voltmeter to point a and measure the noise voltage, as shown in figure 42. s/n = 20 log 3000/v n where v n (mv) is the value the voltmeter reads. noise limited sensitivity (v sn ) defined as the input voltage at which s/n is 30 db. pif input resitance at pin 12 and 13 (r i 1 2 , r i13 ) measure with an r-x meter, with frequency adjusted to 58.75 mhz. pif input capacitance at pin 12 and 13 (c i12 , c i13 ) m e a s u r e with an r -x meter, w ith fr e q u e n c y adjusted to 58.75 mhz. video output resistance (r out ) measure output voltage v o at point a with s1 open.then, connecting 1 k w to point a, measure output voltage v o ' with s1 open. r out = 1000 x (v o /v o ' ?1) aft quiescent voltage (vm1) no input signal. s3 closed. v g = 6 v. measure the voltage at point b. dc output voltage at aft (vm2) s2 closed. defeat on. measure the voltage at point b. aft detection sensitivity (?, aft hold rang e high (f a m ), aft hold range low (f a l ) , m a x i m um aft v o l t a ge (v a max ), minim u m aft voltage (v a min ) with s3 closed, adjust v g so that the minimum output voltage level at point a goes to the same level as the sync tip. (see figure 43.) then measure the output voltage at point b. (see figure 44.) t ime constant at agc lock pr ev ention circuit ( t l ) increase the noise level to operate the noise canceller. extend the noise width gradually and measure the noise width at which the noise canceller stops operating. gain attenuation (v at ) attenuate the rf stage gain of the tuner. adjust vr1 for 75 db?of the delay point. see figure 45. vertical interval distortion (v ver ) measure the vertical interval distortion at point a, as in figure 46. 17 HA11440A, ha11442a HA11440A, ha11442a
external components part recommended connected no. value pins ???????????????????????? r 1 82 w r 2 1.2 k w r 3 6.8 k w r 4 27 w r 5 560 w r 6 330 w c 1 0.01 pf c 2 0.01 pf c 3 0.01 pf l 1 0.75 ? q 1 2 sc 1906 ??????????????????????? r 1 220 w 12, 13 l 2 0.47 ? ??????????????????????? c 4 0.01 ? 12, 13 c 5 0.01 ? ??????????????????????? c 6 0.01 ? 11, 14 ??????????????????????? c 7 0.47 15 (tantalum) r 21 300 k ??????????????????????? r 8 10 k w 16 r 9 6.8 k w c 8 0.1 pf vr 1 10 k (b curve) ??????????????????????? part recommended connected no. value pins ???????????????????????? r 11 330 w 1 r 12 4.3 k w r 13 5.6 k w r 14 3 k w s trap q 2 2 sc 458 (r 21 ) (3.9 k) ??????????????????????? r 15 9.1 k w 4, 5 c 9 22 pf l 3 ??????????????????????? r 16 5.6 k w 7 d 3 1 s 2076 c 11 0.022 ? (ml) ??????????????????????? r 17 47 k w 8 r 18 56 k w c 12 4700 pf ??????????????????????? c 17 4.7 ?25 v 9 c 18 0.01 pf l 12 100 ? ??????????????????????? r 19 (3 k) 10 r 20 (15 k) c 15 (4.7 ?16 v) ???????????????????????? 20 HA11440A, ha11442a HA11440A, ha11442a
external components r 1 ?r 6 , c 1 ?c 3 , l 1 , q 1 pre-amp for compensation of po w er loss caused b y s a w (surface acoustic wave) filter a p p l i c at i o n . the circuit constant is determined in the cir c u i t with mur a ta saf-58mb (saw filter). when using another saw filter, adjust l1 and r5 to match. r 7 , l 2 for ma t c hing the saw filter and ic. since the input resistance (1.8 k w typ) and input capacitance (3.0 pf typ) of the ic are high enough, ma t ch i n g with the saw filter is easily done by changing the values of r2 and l2. howev e r , when the input impedance of the saw filter is high, unnecessar y e xternal signals such as car r ier filter output (pin 14 and 15), video output (pin 1), and so on impair the weak electrical field c h a ra c t e r istics. use of the s a w filter with lower impedance (below 200 w ) s t ab i l i z es weak electrical field c h a ra c t e r istics. a saw filter with 14 ?18 db p/s is recommended. c 4 , c 5 coupling capacitance between the saw filter and ic. c 6 c a pacita nce for low pa ss and dc f e e d b a c k t e r minal of if amp. internal resistance is set at 6 k w (min 4.2 k w ). the following connection is also possible (see figure 47). c 7 , r 21 c a pacitance for low pass at if agc. if smaller c a pacitance is a p p l i e d , high agc response is obtained, but vertical period distortion and sync tip s a g are impair e d . a tantalum capacitor with high temperature characteristic is recommended. r 8 , r 9 , c 8 , vr 1 e x t e r nal circuit for determining delayed a g c switching level. r 11 ?r 14 , s trap, q 2 , (r 21 ) buf f er amp between sound tr a p and video output. w hen a ceramic filter is applied, r21 is connected to pin 1 and functions as dc load. unless r21 is c o n n e c t e d , diff e r ential ga in c h a ra c t e ri s t i c , d i f f e r ential phase c h a ra c t e ri s t i c , 920 khz bea t , c r oss color, etc. deter i o r a t e . sound trap: t o k o btkac31086. r 15 , c 9 , l 3 pha se s hift circuit. the cir cui t cons ta nt is d e t e r mined to get the best diff e r ential phase c h a ra c t e ri s i t i c , (q = 35). if the value of q ( t r ansistor) of the tank circuit or that of r15 (damping resistor) is c h a n ge d , load r e s i s t a n c e b e t w een pins 4 and 5 is c h a n g ed and the carr i e r filter outpu t v o l t a ge between pins 4 and 5 is l o w e re d . as a re sult, diff e r ent ial ga in a nd dif f erential phase characteristics are impaired. l3: t oko 10 k bobin, 0.17 ?enamel wir e , number of turns = 5 t r 16 , d 3 , c 11 r16, d3: prevent excessive current, and protect ic c11: bypasses unnecessary current when pin 7 (aft def e a t pin) v o l t a ge is f i xe d within the r a n g e of 3 v and vcc, operation of aft circuit is discontin u e d , and aft output (pin 8) is fixed to the center point. r 17 , r 18 , c 12 aft load resistance c 13 , c 14 , l 15 filter capacitance at power source r 19 , r 20 , c 15 d e t e r mine rf agc time constant. the inter n a l circuits of pin 10 are shown in figures 48 and 49. determine pin 10 load and time constant according to automatic gain control characteristic of the tuner (refer to the maximum output current). 21 HA11440A, ha11442a HA11440A, ha11442a
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