53098ha (kt) no.4091-1/7 sanyo electric co.,ltd. semiconductor bussiness headquaters tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan vcr audio signal recording and playback processor ordering number:en4091 LA7285, 7285m monolithic linear ic r e t e m a r a pl o b m y ss n o i t i d n o cs g n i t a rt i n u e g a t l o v y l p p u s m u m i x a mv c c x a m 4 1v e g a t l o v t u p n i 1 n i pv n i 1c d 5 6 +p - p v t n e r r u c t u p n i 1 n i pv n i 1 5 . 1 ? m n o i t a p i s s i d r e w o p e l b a w o l l ax a m d p 0 0 4w m e r u t a r e p m e t g n i t a r e p or p o t 5 6 + o t 0 1 e r u r t a r e p m e t e g a r o t sg t s t 0 5 1 + o t 5 5 ta 65?c sanyo:dip24s package dimensions unit:mm 3067-dip24s [LA7285] operating conditions at ta=25?c overview the LA7285 and LA7285m include on chip all functions required for the record and playback of vcr audio signals. in addition, the inclusion of a switching circuit for switching between tuner and line input in addition to the circuits provided by earlier ics makes the LA7285 truly optimal for audio vcr products. funtions ? equalizer amplifier ? line amplifier ? recording/playback switch ? recording amplifier ? mute ? sp, lp, ep switch ? ripple filter ? alc ? tape head switch ? line/tuner input switch features ? built-in input switching circuit (for the line and tuner inputs). ? smaller package leaves large space for other components. ? equalizer input/output capacitors not required. ? low gain variation eliminates the need for external ajustment. ? supply voltage : 9v and 12v operation. specifications maximum ratings at ta = 25?c unit:mm 3112-mfp24s [LA7285m] sanyo:mfp24s r e t e m a r a pl o b m y ss n o i t i d n o cs g n i t a rt i n u e g a t l o v y l p p u s d e d n e m m o c e rv c c 2 1v e g n a r e g a t l o v y l p p u s g n i t a r e p ov c c p o 5 7 . 2 1 o t 5 . 8v ?c ?c
LA7285, 7285m no.4091-2/7 r e t e m a r a pl o b m y ss n o i t i d n o c s g n i t a r t i n u n i mp y tx a m ) e e ( n o i t p m u s n o c t n e r r u ci e c c l a n g i s o n5 . 90 . 3 15 . 6 1a m ) b p ( n o i t p m u s n o c t n e r r u ci p c c l a n g i s o n5 . 90 . 3 15 . 6 1a m ) c e r ( n o i t p m u s n o c t n e r r u ci r c c l a n g i s o n0 . 80 . 1 10 . 4 1a m ] r e i f i l p m a r e z i l a u q e [ n i a g e g a t l o v t i u c r i c - n e p og v e o v o v b d 7 =0 . 6 60 . 1 7b d e g a t l o v e s i o n t u p n i t n e l a v i u q ev e i n k 2 . 2 = g r ? r e t l i f o i d u a n i d ,2 . 18 . 1s m r v ] r e i f i l p m a e n i l [ ) t u p n i b p ( n i a g e g a t l o vg v p l v o v b d 7 =0 . 1 25 . 1 20 . 2 2b d ) t u p n i e n i l , e e ( n i a g e g a t l o v g v , e l g v l l v o v b d 7 =0 . 1 25 . 1 20 . 2 2b d n o i t r o t s i d c i n o m r a h l a t o td h t l v o v b d 7 =5 0 . 03 . 0% e g a t l o v e s i o n t u p t u ov l o n k 2 . 2 = g r ? r e t l i f o i d u a n i d ,2 7 6 6 v b d e g a t l o v t u p t u o m u m i x a mv l m o % 1 = d h t5 . 11 . 2s m r v n o s i c l a n e h w e g a t l o v t u p t u ov a o v n i v b d 7 2 =0 . 8 0 . 7 0 . 6 v b d t c e f f e c l ac l av n i v b d 7 o t v b d 7 2 =0 . 10 . 3b d n o s i c l a n e h w n o i t r o t s i dd h t a v n i v b d 7 2 =5 0 . 06 . 0% ] r e i f i l p m a g n i d r o c e r [ ) n e p o ( n i a g e g a t l o vg v r o v o v b d 7 =0 . 7 40 . 2 5b d ) e s l o c ( n i a g e g a t l o vg v r o v o v b d 7 =5 . 2 10 . 3 15 . 3 1b d n o i t r o t s i d c i n o m r a h l a t o td h t r v o v b d 7 =1 . 03 . 0% e g a t l o v t u p t u o m u m i x a mv r m o % 1 = d h t5 . 10 . 2s m r v ] t i u c r i c e t u m [ e g a t l o v n ov n o m e g a t l o v c d 3 2 n i p5 . 20 . 6v e g a t l o v f f ov f f o m e g a t l o v c d 3 2 n i p05 . 1v ) e e , b p ( n o i t a u n e t t a e t u mm p m , e 0 80 9b d ) c e r ( n o i t a u n e t t a e t u mm r 5 65 7b d ] t i u c r i c h c t i w s p s , p l , p e [ e g a t l o v d l o h e d o m p ev e e e g a t l o v c d 1 2 n i p6 . 30 . 6v e g a t l o v d l o h e d o m p lv l e e g a t l o v c d 1 2 n i p8 . 16 . 2v e g a t l o v d l o h e d o m p sv s e e g a t l o v c d 1 2 n i p00 . 1v ] t i u c r i c h c t i w s b p r e n u t / e n i l [ e g a t l o v d l o h e d o m e n i lv l l e g a t l o v c d 2 2 n i p6 . 30 . 6v e g a t l o v d l o h e d o m r e n u tv t l e g a t l o v c d 2 2 n i p8 . 16 . 2v e g a t l o v d l o h e d o m b pv p l e g a t l o v c d 2 2 n i p00 . 1v ] t i u c r i c h c t i w s e e , c e r [ e g a t l o v d l o h e d o m c e rv r r e g a t l o v c d 4 2 n i p3v c c v e g a t l o v d l o h e d o m e ev e r e g a t l o v c d 4 2 n i p00 . 1v ] h c t i w s t c e l e s d a e h [ e c n a t s i s e r n o 1 n i pr n o 1a m 1 = 1 i0 20 3 ? e c n a t s i s e r n o 2 n i pr n o 2a m 1 = 2 i50 1 ? e g a t l o v t u p n i 2 n i pv n i 1 5 4 v operating characteristics at ta=25 ? c, v cc =12v, f=1khz, 0dbv : 1.0 vrms ta=65 ? c, f=80khz (sin), i lk =10 a
LA7285, 7285m no.4091-3/7 block diagram test circuit unit (resistance: ? , capacitance:f)
LA7285, 7285m no.4091-4/7 switch operation table sample application circuit ) l o b m y s ( m e t i t s e t1 w s2 w s3 w s4 w s5 w sv m v l v r t u p n ie r u s a e m i e c c 21121 d n gv 5d n g a i p c c 21121 d n gd n gd n g a i r c c 21121 d n gv 5v 5 a g v e o 12321 d n gd n gd n gv n i 1v o 1 v e i n 21321 d n gd n gd n g v o 1 g v p l d h t , l v , l m o 21221 d n gd n gd n gv n i 2v o 2 g v e l g v , l l 21121 d n gv 5 , v 5 . 2d n gv n i v , 3 n i 4v o 2 v l o n 21321 d n gv 5d n g v o 2 v a o d h t , c l a , a 21311 d n gv 5 , v 5 . 2d n gv n i v , 3 n i 4v o 2 g v r o 21322 d n gv 5d n gv n i 5v o 3 o g v r d h t , r v , r m o 21321 d n gv 5d n gv n i 5v o 3 m p 11121 v 5d n gd n gv n i 1v o 2 m r 21121 v 5v 5d n gv n i 5v o 3 m e 21321 v 5v 5d n gv n i 2v o 2 unit (resistance: ? , capacitance:f)
LA7285, 7285m no.4091-5/7 . o n n i pe m a n n o i t c n u fn i p r o f t i u c r i c l a n r e t n i n o i t c n u f f o n o i t p i r c s e d 1 1 h c t i w s d a e h ) e g a t l o v d n a t s h t i w h g i h ( b p , e e c e r , f f o f f o e c n a t s i s e r n o 0 2 ? ) p y t ( f f o n e h w e g a t l o v d n a t s h t i w v 5 4 ) z h k 0 8 = f ( 2 d n a t u p n i p m a q e 2 h c t i w s d a e h l a n g i s k c a b y a l p r o f e c n a d n e p m i t u p n i d a e h m o r f t u p n i k 0 8 ? ) p y t ( c e r , e e n o b p f f o e c n a t s i s e r n o 5 ? ) p y t ( 3d n g d n a h c t i w s d a e h 1 n i p r o f d n g y l n o r e i f i l p m a r e z i l a u q e 41 h c t i w s e d o m p e d n a s d a e h e p a t e g n a h c o t e s u . y c n e u q e r f t n a n o s e r e c n a t s i s e r n o 5 1 ? ) p y t ( e c n a d n e p m i t u p n i k 0 1 ? ) p y t ( ) e d o m p e ( 52 h c t i w s e d o m p e r e z i l a u q e k c a b y a l p e h t s e h c t i w s y c n e u q e r f n o i g e r - h g i h r e i f i l p m a . n i a g e g a t l o v e c n a t a t i s e r n o k 5 1 ? ) p y t ( e c n a d e p m i t u p n i k 0 1 ? ) p y t ( ) e d o m p e ( 6b f n p m a q e e v i t a g e n r e i f i l p m a r e z i l a u q e n i p k c a b d e e f 7t u p t u o p m a q e 8t u p n i b p p m a e n i l e h t m o r f l a n g i s k c a b y a l p e h t s t u p n i e h t e s u a c e b . r e i f i l p m a r e z i l a u q e k 0 1 1 s a h g i h s a s i e c n a d e p m i t u p n i , ? d e s u e b n a c r o t i c a p a c c i m a r e c f 1 . 0 a . 8 n i p n o r o t i c a p a c g n i l p u o c e h t r o f 9r e t l i f c l a n e h w d e m r o f r e p s i n o i t c e t e d e v a w a h g u o r h t d n g o t d e t c e n n o c d n a k c a t t a e h t , n o i t i d d a n i . r o t i c a p a c r d n a c y b t e s s i e m i t y r e v o c e r . s t n a t s n o c e m i t 0 1t u p n i r e n u t 1 1d n g e h t t p e c x e s k c o l b t i u c r i c l l a r o f d n g . r e i f i l p m a r e z i l a u q e d n a h c t i w s d a e h pin function unit (resistance: ? ) continued to next page. inputs ee and rec signals. the reference input is set by resistors r1 and r2. the amplifier gain is fixed at 21.5db. in addition, because the input impedance is as high as 110k ? , a 0.1 f ceramic capacitor can be used for the coupling capacitor on pin 10. internal reference internal reference
LA7285, 7285m no.4091-6/7 . o n n i pe m a n n o i t c n u fn i p r o f t i u c r i c l a n r e t n i n o i t c n u f f o n o i t p i r c s e d 2 1t u p n i e n i l 3 1n o i t c e t e d e v a w t u p n i c l a 4 1t u p t u o p m a e n i l 5 1t u p n i p m a c e r 6 1h c t i w s e d o m p l 7 1b f n p m a c e r 8 1t u p t u o p m a c e r 9 1r e t l i f e l p p i r 0 2v ( e g a t l o v y l p p u s c c ) 1 2l o r t n o c p s / p l / p e continued from proceeding page. continued to next page. unit (resistance: ? ) inputs the line amplifier output signal. the alc level is set by the resistors r1 and r2. output inpedance 50 ? (typ) inputs the recording signal from line amplifier. the recording current is set by the resistors r1 and r2. a coupling capacitor is unnecessary as pin 15 is a zero baias input. used to adjust the high-region peaking frequency during recording amplifier in lp mode. on resistance 15 ? (typ) intput inpedance 50 ? (typ) recording amplifier negative- feedback input. used to adjust the high-region peaking frequency of the recording amplifier with an l, c, r network connected to ground. output inpedance 40 ? (typ) ripple rejection is performed when connected to gnd through an electrolytic capacitor for the filter. v cc max=14v v cc =8.5v to 12.75v when the voltage on pin 21 is 3.6v to 6.0v:ep; when 1.8v to 2.6v:lp; when 0v to 1.8v:sp switch on pin number ep mode:4,5,16 lp mode:16 inputs ee and re signals. the reference input is set by resistors r1 and r2.the amplifier gain is fixed at 21.5 db. in addition, because the input impedance is as high as 110k ? , a 0.1 f ceramic capacitor can be used for the coupling capacitor on pin 12. internal reference power supply of each circuit block
LA7285, 7285m ps no.4091-7/7 no products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. anyone purchasing any products described or contained herein for an above-mentioned use shall: accept full responsibility and indemnify and defend sanyo electric co., ltd., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: not impose any responsibilty for any fault or negligence which may be cited in any such claim or litigation on sanyo electric co., ltd., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production. sanyo believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. this catalog provides information as of may, 1998. specifications and information herein are subject to change without notice. . o n n i pe m a n n o i t c n u fn i p r o f t i u c r i c l a n r e t n i n o i t c n u f f o n o i t p i r c s e d 2 2l o r t n o c b p / r e n u t / e n i l n o e g a t l o v e h t n e h w ; e n i l : v 0 . 6 o t v 6 . 3 s i 2 2 n i p r e n u t : v 6 . 2 o t v 8 . 1 n e h w b p : v 0 . 1 o t v 0 n e h w 3 2l o r t n o c e t u m n o e g a t l o v e h t n e h w ; n o e t u m : v 0 . 6 o t v 5 . 2 s i 3 2 n i p f f o e t u m : v 5 . 1 o t v 0 n e h w 4 2l o r t n o c e e / c e r n o e g a t l o v e h t n e h w v o t v 5 . 2 s i 4 2 n i p c c ; c e r : e e : v 0 . 1 o t v 0 n e h w continued from proceeding page. unit (resistance: ? )
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