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?1 CXA2511AQ e96828-ps dolby * b-c type noise reduction system with playback equalizer amplifier description the CXA2511AQ is an ic designed for use in car stereo cassette decks. functions include dolby b-c type noise reduction (nr) system, playback equalizer amplifier and music sensor into a single chip. features few external parts small package (40-pin qfp) same pin configuration as for the dolby b type nr system (cxa2510aq) and no dolby nr system (cxa2509aq) dolby b-c type nr and playback equalizer amplifier into a single chip forward/reverse head select switch two-system (tape/aux) input select switch music signal interval detection level can be set by the external resistors/capacitors (2 modes). high-frequency cut-off of the music sensor circuit can be adjusted by the external capacitance. applications car stereo cassette decks playback-only cassette decks structure bipolar silicon monolithic ic absolute maximum ratings supply voltage v cc 12 v operating temperature topr ?0 to +85 ? storage temperature tstg ?5 to +150 ? power dissipation p d 430 mw operating condition supply voltage v cc 7.8 to 11 v sony reserves the right to change products and specifications without prior notice. this information does not convey any licens e by any implication or otherwise under any patents or other right. application circuits shown, if any, are typical examples illustr ating the operation of the devices. sony cannot assume responsibility for any problems arising out of the use of these circuits. 40 pin qfp (plastic) * this ic is available only to the licensees of dolby laboratories licensing corporation from whom licensing and applications information may be obtained. * "dolby" and the double d symbols are trademarks of dolby laboratories licensing corporation.
? 2 CXA2511AQ block diagram and pin configuration n r b i a s f w d / r v s 1 n r t a p e / a u x t a p e e q m s m o d e n r m o d e d e t n r l p f 1 v c t v c c o f f / b / c t 2 m s o n / o f f f 3 t 1 o f f / b / c f 2 f 1 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 1 3 2 3 3 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 3 4 5 6 7 8 9 1 0 1 p b f b 2 p b r i n 2 p b r e f 2 p b f i n 2 v c t p b g n d p b f i n 1 p b r e f 1 p b r i n 1 p b f b 1 p b e q 2 p b o u t 2 t a p e i n 2 g n d a u x i n 2 d i r e f t c h 2 l i n e o u t 2 t c l 2 m s s w m s m o d e d r s w t a p e s w i n s w n r s w n r m o d e m s o u t d g n d m s t c g 1 f b p b e q 1 p b o u t 1 t a p e i n 1 v c c a u x i n 1 m s l p f t c h 1 l i n e o u t 1 t c l 1 g 2 f b 1 2 0 / 7 0 1 2 0 / 7 0
? 3 CXA2511AQ pin description (ta = 25 c, v cc = 8.0v, dv cc = 5.0v) 1 30 pbeq1 pbeq2 o resistance for selecting the playback equalizer amplifier time constant 4.0v 3 0 1 g n d 1 k 4 0 k 1 k 5 k v c c 2 29 pbout1 pbout2 o playback equalizer amplifier output 4.0v ?5dbm 3 v cc power supply 8.0v 2 2 9 g n d 2 0 0 2 0 0 v c c 4 27 tapein1 tapein2 i 40k tape input 5 26 auxin1 auxin2 external input 4.0v ?0dbm 4 5 2 6 2 7 g n d 1 4 7 4 0 k v c c v g s 2 0 p 6 mslpf 100k cut-off frequency adjustment of the music sensor lpf 4.0v 6 g n d 1 4 7 v c c 6 4 p 1 0 0 k pin no. symbol typical pin voltage i/o i/o resistance equivalent circuit description dc ac
? 4 CXA2511AQ 7 24 lineout1 lineout2 o line output 4.0v ?dbm 8 23 tch1 tch2 time constant for the hls 0.3v 9 22 tcl1 tcl2 time constant for the lls 0.3v 10 11 g2fb g1fb music signal interval detection level setting 4.0v 13 dgnd logic ground (connect to gnd.) 0.0v 7 2 4 g n d 2 0 0 2 0 0 v c c 2 2 . 5 k 1 4 7 2 3 g n d 3 6 k 3 3 0 k v c c 1 4 7 8 2 2 g n d 1 3 . 5 k 4 8 0 k v c c 1 4 7 9 1 1 g n d 5 0 0 v c c 1 4 7 1 0 5 0 0 pin no. symbol typical pin voltage i/o i/o resistance equivalent circuit description dc ac
? 5 CXA2511AQ 12 mstc time constant for detecting the music signal interval 1 2 g n d 1 4 7 1 0 k v c c d g n d 8 5 3 14 msout o music sensor output 0.2v when a signal is detected; dvcc when no signal is detected g n d 1 4 7 v c c d g n d 1 4 d v c c 1 0 0 k 15 nrmode i 100k dolby nr mode control low (open): dolby b type nr high: dolby c type nr 17 insw line amplifier input select control low (open): tapein high: auxin 21 mssw music sensor control low (open): ms on high: ms off 16 nrsw dolby nr control low (open): nr off high: nr on 18 tapesw playback equalizer amplifier control low (open): 120 s high: 70 s 19 drsw head select control low (open): forward high: reverse 0.0v when open 1 5 2 1 g n d 1 0 0 k v c c 1 . 1 k d g n d 1 7 i 100k 0.0v when open 1 6 1 9 g n d 1 0 0 k v c c 1 . 1 k d g n d 1 8 pin no. symbol typical pin voltage i/o i/o resistance equivalent circuit description dc ac
? 6 CXA2511AQ 20 msmode i 100k music sensor mode control low (open): g1 high: g2 0.0v when open g n d 1 0 0 k v c c 1 . 1 k d g n d 2 0 25 diref resistance for setting the dolby nr reference current (connects 20k between diref pin and gnd for the standard setting.) 1.2v v c c 1 4 7 2 5 g n d 4 0 3 6 3 4 3 1 3 2 v c c g n d 3 9 p b r e f p b r e f 5 0 p 5 0 p 28 gnd ground 0.0v 31 40 pbfb2 pbfb1 i playback equalizer amplifier feedback 4.0v ?0dbm 32 39 pbrin2 pbrin1 playback equalizer amplifier input (reverse head connected) 34 37 pbfin2 pbfin1 i playback equalizer amplifier input (forward head connected) 4.0v ?0dbm pin no. symbol typical pin voltage i/o i/o resistance equivalent circuit description dc ac
? 7 CXA2511AQ 33 38 pbref2 pbref1 o playback equalizer amplifier reference (vcc/2 output) 4.0v 3 8 3 3 g n d 2 0 0 v c c 2 0 0 35 vct o center (vcc/2 output) 4.0v 3 5 g n d 4 5 k v c c 1 4 7 1 3 0 k 3 0 k v g s 36 pbgnd playback equalizer amplifier ground (connect to ground.) 0.0v pin no. symbol typical pin voltage i/o i/o resistance equivalent circuit description dc ac
? 8 CXA2511AQ vopr i cc v tin v aux bp1 bp2 bp3 bp4 bp5 cp1 cp2 cp3 cp4 cp5 cp6 thd1 thd2 thd3 sn1 sn2 sh1 ct1 ct2 no signal, nr off, tape, 120 s, ms on tapein 1khz, lineout 0db, nr off auxin 1khz, lineout 0db tapein 500hz, lineout ?5db, nr b tapein 2khz, lineout ?5db, nr b tapein 5khz, lineout ?5db, nr b tapein 10khz, lineout ?0db, nr b tapein 10khz, lineout 0db, nr b tapein 500hz, lineout ?0db, nr c tapein 500hz, lineout ?5db, nr c tapein 2khz, lineout ?0db, nr c tapein 2khz, lineout ?5db, nr c tapein 5khz, lineout ?5db, nr c tapein 10khz, lineout 0db, nr c tapein 1khz ?0dbm, nr off, rl = 2.7k tapein 1khz ?0dbm, nr b, rl = 2.7k tapein 1khz ?0dbm, nr c, rl = 2.7k no signal, nr b, rg = 5.1k , ccir/arm filter used no signal, nr c, rg = 5.1k , ccir/arm filter used tapein 1khz, nr off, rl = 2.7k , thd = 1% tapein 1khz ?4dbm, nr off, 1khz bpf used auxin 1khz ?4dbm, 1khz bpf used 7.8 13.0 ?2.0 ?2.0 1.4 5.5 3.9 9.7 ?.1 14.2 7.2 18.7 5.4 3.5 ?.5 77.0 80.0 13.0 8.0 19.2 ?0.0 ?0.0 2.9 7.0 5.4 10.4 0.4 16.2 9.2 20.7 7.4 5.5 ?.5 0.01 0.04 0.05 87.0 82.0 14.4 ?6.0 ?6.0 11.0 25.0 ?8.0 ?8.0 4.4 8.5 6.9 11.9 1.9 18.2 11.2 22.7 9.4 7.5 ?.5 0.2 0.2 0.3 ?0.0 ?0.0 v ma dbm dbm db db db db db db db db db db db % % % db db db db db operating voltage current consumption tapein input sensitivity auxin input sensitivity b type decode boost characteristics 1 b type decode boost characteristics 2 b type decode boost characteristics 3 b type decode boost characteristics 4 b type decode boost characteristics 5 c type decode boost characteristics 1 c type decode boost characteristics 2 c type decode boost characteristics 3 c type decode boost characteristics 4 c type decode boost characteristics 5 c type decode boost characteristics 6 total harmonic distortion 1 total harmonic distortion 2 total harmonic distortion 3 decode s/n ratio 1 decode s/n ratio 2 signal handling crosstalk between channels 1 crosstalk between channels 2 dolby nr (0db = dolby level lineout of ?dbm) electrical characteristics (ta = 25 c, v cc = 8.0v. dv cc = 5.0v) item symbol measurement conditions min. typ. max. unit
? 9 CXA2511AQ ct3 v os 1 pbref f120 f70 sh2 thd4 sn3 v os 2 ct4 ct5 v ms 1 v ms 2 i oh v ol v il v ih tape (aux) in 1khz ?4dbm, nr off, aux (tape) mode, 1khz bpf used * 1 no signal, nr off, difference from vct pbin 315hz ?0dbm, 120 s mode pbin 2.7khz ?8.5dbm, 120 s mode at 315hz pbin 4.5khz ?3.8dbm, 70 s mode at 315hz pbin 1khz, 120 s mode, rl = 2.7k , thd = 1% pbin 1khz ?2dbm, 120 s mode, rl = 2.7k no signal, 70 s mode, rg = 680 , ccir/arm filter used no signal, 120 s mode, rg = 680 , difference from vct pbin 1khz ?2dbm, 120 s mode, 1khz bpf used pbin 1khz ?2dbm, 120 s mode, 1khz bpf used tapein 5khz, ms on, g1 mode, external constant of 39k and 0.0047 f tapein 5khz, ms on, g2 mode, external constant of 3.9k and 0.47 f no signal, ms off, g1 mode tapein 5khz ?0dbm, ms on, g1 mode, 1ma applied to msout pin input voltage of nrmode, nrsw, insw, tapesw, drsw, msmode, mssw input voltage of nrmode, nrsw, insw, tapesw, drsw, msmode, mssw ?.1 ?7.0 ?.5 ?.5 ?0.0 59.0 ?.0 ?3.0 ?3.0 0.0 2.5 ?7.0 0.0 ?5.0 0.0 0.0 ?.0 0.07 64.5 0.0 ?1.0 ?0.0 ?0.0 ?0.0 0.0 0.3 ?5.0 0.1 ?3.0 1.5 1.5 0.5 1.0 ?0.0 ?0.0 ?7.0 ?7.0 1.0 1.0 0.5 dv cc db v dbm db db dbm % db v db db dbm dbm a v v v crosstalk between tape and aux output dc offset voltage playback equalizer amplifier reference output level playback equalizer amplifier frequency response 1 playback equalizer amplifier frequency response 2 signal handling total harmonic distortion s/n ratio output dc offset voltage crosstalk between channels crosstalk between forward and reverse signal detection level 1 signal detection level 2 ms output leak current ms output saturation voltage low level high level playback equalizer amplifier music sensor logic voltage * 1 the crosstalk between tape and aux is measured with a 5.1k external resistor connected to auxin1 (pin 5). in this condition, the crosstalk is approximately ?7db due to the signal leak from mslpf (pin 6). in order to improve the crosstalk between tape and aux, auxin1 pin should be driven with a low impedance. item symbol measurement conditions min. typ. max. unit
? 10 CXA2511AQ electrical characteristics measurement circuit a u d i o s g p b f b 2 p b r i n 2 p b r e f 2 p b f i n 2 v c t p b g n d p b f i n 1 p b r e f 1 p b r i n 1 p b f b 1 p b e q 2 p b o u t 2 t a p e i n 2 g n d a u x i n 2 d i r e f t c h 2 l i n e o u t 2 t c l 2 m s s w m s m o d e d r s w t a p e s w i n s w n r s w n r m o d e m s o u t d g n d m s t c g 1 f b p b e q 1 p b o u t 1 t a p e i n 1 v c c a u x i n 1 m s l p f t c h 1 l i n e o u t 1 t c l 1 g 2 f b v c c r 1 1 1 8 k c 1 1 1 c 1 3 1 c 1 5 2 7 0 p c 1 6 2 . 2 c 1 8 0 . 1 c 2 0 0 . 0 6 8 c 2 2 0 . 4 7 c 2 3 4 . 7 n r 2 2 3 . 9 k r 2 3 3 9 k c 9 2 . 2 c 1 7 2 . 2 c 1 9 0 . 1 c 2 1 0 . 0 6 8 g n d 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 1 3 2 3 3 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 3 4 5 6 7 8 9 1 0 1 c 2 4 0 . 1 r 2 5 1 m e g r 2 4 1 0 0 k a r 3 0 1 0 k s 1 8 n r m o d e h / l n r s w h / l i n s w h / l t a p e s w h / l d r s w h / l m s m o d e h / l m s s w h / l d v c c r 5 1 2 k p o w e r s u p p l y d c a m m e t e r g n d g n d c c i r / a r m a w t g d i n a u d i o 1 k h z b p f d c v o l t m e t e r 0 d b o r 3 0 d b a m p o f f : 0 d b o n : 3 0 d b r 3 6 5 0 k s 2 4 s 2 9 s 2 8 s 2 7 s 2 6 s 2 5 + 2 0 d b + 2 0 d b a c v o l t m e t e r d i s t o r t i o n a n a l y z e r o s c i l l o s c o p e s 2 3 s 2 2 s 2 1 s 2 0 s 1 9 r 3 5 1 0 k r 3 4 1 0 0 r 3 3 1 0 k r 3 2 1 0 0 r 3 1 1 0 k s 1 7 s 1 6 s 1 5 s 1 4 r 2 9 1 0 k r 2 8 1 0 0 r 2 7 1 0 k r 2 6 1 0 0 r 2 0 2 . 7 k s 1 2 s 1 1 s 8 s 7 r 1 7 5 . 1 k r 1 5 5 . 1 k r 1 3 2 . 7 k s 5 c 8 2 . 2 c 1 0 2 2 c 6 0 . 0 1 r 1 3 0 0 k s 1 c 1 2 . 2 r 2 2 7 0 r 6 6 8 0 r 7 6 8 0 s 2 c 2 2 . 2 c 3 2 2 s 3 c 4 2 . 2 r 9 6 8 0 r 8 6 8 0 s 4 c 5 2 . 2 c 7 0 . 0 1 r 1 2 1 8 k r 1 0 1 2 k r 4 3 0 0 k r 3 2 7 0 c 1 2 1 c 1 4 1 r 1 9 2 0 k r 1 4 2 . 7 k r 1 6 5 . 1 k r 1 8 5 . 1 k r 2 1 2 . 7 k s 8 s 1 0 s 1 3 s 6 * * * * * * * * * * * * * * * * * * * * * * * * : * : n o t e 1 . r e s i s t o r t o l e r a n c e 2 . c a p a c i t o r t o l e r a n c e c o u p l i n g c a p a c i t o r 5 % 1 % 5 % 2 % 1 0 %
? 11 CXA2511AQ application circuit 1 n r b i a s f w d / r v s 1 n r t a p e / a u x t a p e e q m s m o d e n r m o d e n r l p f 1 v c t v c c o f f / b / c t 2 f 3 t 1 o f f / b / c 1 2 0 / 7 0 1 2 0 / 7 0 f 2 f 1 c 4 4 7 0 p c 3 4 7 0 p r 3 1 0 0 k r 4 1 0 0 k p b f b 2 p b r i n 2 p b e q 2 p b o u t 2 t a p e i n 2 m s m o d e r 1 1 1 2 k r 9 1 8 k r 1 2 3 0 0 k g n d p b r e f 2 p b f i n 2 v c t p b g n d p b f i n 1 p b r e f 1 p b r i n 1 p b f b 1 g n d a u x i n 2 d i r e f t c h 2 l i n e o u t 2 t c l 2 m s s w d r s w t a p e s w i n s w n r s w n r m o d e m s o u t d g n d m s t c g 1 f b p b e q 1 p b o u t 1 t a p e i n 1 v c c a u x i n 1 m s l p f t c h 1 l i n e o u t 1 t c l 1 g 2 f b r v s 2 f w d 2 c 5 2 2 f w d 1 r v s 1 c 2 4 7 0 p c 1 4 7 0 p r 1 1 0 0 k r 2 1 0 0 k r 5 1 8 0 c 6 0 . 0 1 r 1 0 1 2 k r 7 3 0 0 k r 8 1 8 k a u x i n 1 c 8 2 2 v c c g n d l i n e o u t 1 g n d g n d g n d g n d g n d c 1 4 2 . 2 c 9 2 . 2 c 1 1 2 . 2 c 1 3 0 . 0 0 1 c 1 6 0 . 1 c 1 8 0 . 0 6 8 c 2 0 0 . 4 7 c 2 1 4 . 7 n r 1 6 3 . 9 k r 1 7 3 9 k c 7 0 . 0 1 c 1 0 2 . 2 c 1 2 2 . 2 c 1 5 2 . 2 c 1 7 0 . 1 c 1 9 0 . 0 6 8 r 1 5 2 0 k l i n e o u t 2 g n d g n d g n d a u x i n 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 1 3 2 3 3 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 3 4 5 6 7 8 9 1 0 1 c 2 2 0 . 1 r 1 8 1 m e g r 1 9 1 0 0 k t o m i c r o c o m p u t e r d v c c d g n d f r o m m i c r o c o m p u t e r g n d g n d r 1 4 3 3 k r 1 3 3 3 k r 6 1 8 0 d e t m s o n / o f f g n d application circuits shown are typical examples illustrating the operation of the devices. sony cannot assume responsibility fo r any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same .
? 12 CXA2511AQ application circuit 2 n r b i a s f w d / r v s 1 n r t a p e / a u x t a p e e q m s m o d e n r m o d e n r l p f 1 v c t v c c o f f / b / c t 2 f 3 t 1 o f f / b / c 1 2 0 / 7 0 1 2 0 / 7 0 f 2 f 1 c 1 4 7 0 p c 2 4 7 0 p r 2 1 0 0 k r 1 r 5 5 0 0 p b f b 2 p b r i n 2 p b e q 2 p b o u t 2 t a p e i n 2 m s m o d e r 1 1 1 2 k r 9 1 8 k r 1 2 3 0 0 k g n d p b r e f 2 p b f i n 2 v c t p b g n d p b f i n 1 p b r e f 1 p b r i n 1 p b f b 1 g n d a u x i n 2 d i r e f t c h 2 l i n e o u t 2 t c l 2 m s s w d r s w t a p e s w i n s w n r s w n r m o d e m s o u t d g n d m s t c g 1 f b p b e q 1 p b o u t 1 t a p e i n 1 v c c a u x i n 1 m s l p f t c h 1 l i n e o u t 1 t c l 1 g 2 f b r v s 2 f w d 2 c 5 2 2 f w d 1 r v s 1 c 3 4 7 0 p c 4 4 7 0 p r 3 1 0 0 k r 6 5 0 0 c 6 0 . 0 1 r 1 0 1 2 k r 7 3 0 0 k r 8 1 8 k a u x i n 1 c 8 2 2 v c c g n d l i n e o u t 1 g n d g n d g n d g n d g n d c 9 2 . 2 c 1 1 2 . 2 c 1 3 0 . 0 0 1 c 1 4 2 . 2 c 1 6 0 . 1 c 1 8 0 . 0 6 8 c 2 0 0 . 4 7 c 2 1 4 . 7 n r 1 4 3 . 9 k r 1 5 3 9 k c 7 0 . 0 1 c 1 0 2 . 2 c 1 2 2 . 2 c 1 5 2 . 2 c 1 7 0 . 1 c 1 9 0 . 0 6 8 r 1 3 2 0 k l i n e o u t 2 g n d g n d g n d a u x i n 2 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 3 0 4 0 3 9 3 8 3 7 3 6 3 5 3 4 3 1 3 2 3 3 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 2 3 4 5 6 7 8 9 1 0 1 c 2 2 0 . 1 r 1 6 1 m e g r 1 7 1 0 0 k t o m i c r o c o m p u t e r d v c c d g n d f r o m m i c r o c o m p u t e r g n d g n d d e t m s o n / o f f 1 0 0 k r 4 1 0 0 k g n d application circuits shown are typical examples illustrating the operation of the devices. sony cannot assume responsibility fo r any problems arising out of the use of these circuits or for any infringement of third party patent and other right due to same .
? 13 CXA2511AQ description of operation 1. signal route n r o f f n r o n a u x t a p e t a p e i n ( 3 0 d b m ) a u x i n p b f b p b e q a m p 1 2 4 d b 2 4 d b 2 4 d b n r a m p 2 p b o u t l i n e o u t ( 6 d b m d o l b y l e v e l ) 7 0 s f w d r v s p b i n fig. 1. signal route block diagram amp1 and amp2 are operational amplifiers. amp1 composes the playback equalizer amplifier by attaching an external resistor and capacitor to pbfb, pbeq and pbout pins. amp2 is an input selector and a line amplifier. the gain is 24db when nr is off. the dolby nr reference level is ?dbm (lineout).
? 14 CXA2511AQ 2. adjustment method 0 1 0 ( d b m ) l i n e o u t 3 0 d b m 4 0 0 h z 2 0 0 n w b / m : d o l b y l e v e l r e f e r e n c e t a p e p b i n ( h e a d ) a u x i n t a p e i n p b o u t 3 0 d b m 6 d b m ( d o l b y l e v e l ) 8 0 3 0 4 0 5 0 6 0 7 0 2 0 v r a d j u s t m e n t fig. 2-1. level diagram (application circuit 1) 0 1 0 ( d b m ) l i n e o u t 3 0 d b m 4 0 0 h z 2 0 0 n w b / m : d o l b y l e v e l r e f e r e n c e t a p e p b i n ( h e a d ) a u x i n t a p e i n p b o u t 3 0 d b m 6 d b m ( d o l b y l e v e l ) 8 0 3 0 4 0 5 0 6 0 7 0 2 0 v r a d j u s t m e n t fig. 2-2. level diagram (application circuit 2) adjust the playback equalizer amplifier gain so that ?dbm (dolby level) is output on lineout (pins 7 and 24) by playing back the reference tape for dolby level adjustment. adjustment should be performed according to the rules of dolby laboratories licensing corporation because this ic has the built-in dolby nr system. list of calibration cassette tape dolby level is defined as 200nwb/m measured according to the ansi high efficiency head method. the followings are the reference tapes specified by dolby laboratories licensing corporation. 1. a-bex laboratories, inc. (part no. tcc-130) 2. basf (product code 09797 xe) 3. kaneon corp. (lc engineering part no. lct-7001) 4. standard tape laboratory (catalogue no. 28) 5. teac corporation, japan (part no. mtt150) 6. teac corporation of america (part no. mtt150) 7. victor company of japan, ltd. (part no. tmt-6130, vtt-727) 8. sony corporation (part no. ty-256)
? 15 CXA2511AQ p b f b p b e q a m p 1 p b o u t 7 0 s f w d r v s p b i n p b r e f r 1 r 2 r 3 r 4 c 1 s w 2 s w 1 6 d b / o c t t 3 g a i n ( d b ) g 1 f 3 f 2 f 1 f r e q u e n c y [ h z ] t 2 t 1 3. playback equalizer amplifier fig. 3. playback equalizer amplifier block diagram fig. 4. playback equalizer amplifier frequency response the CXA2511AQ achieves the frequency response of fig.4 with the circuit configuration shown in fig. 3. two systems (forward and reverse) of playback head input are provided for each channel. the forward input pin is selected when drsw (pin 19) is low; reverse is selected when drsw is high. the playback equalizer amplifier frequency response can be set in two levels. when tapesw (pin 18) is low, sw2 shown in fig. 3 is turned off; when tapesw is high, sw2 is turned on. the external resistance r1 should be adjusted to adjust the playback equalizer amplifier gain. the playback equalizer amplifier frequency response is all determined by the external resistance and capacitance, and it can be obtained with the following equation. g (s) = ? (s = j w ) where, rx = r3 when tapesw pin =low; rx = r3//r4 when tapesw pin = high using the above equation, g1 in fig. 3 and low-frequency time constant (t1) and high-frequency time constants (t2 and t3) are as follows: g1 = 20log t1 = c1 ?(r2 + rx) t2, t3 = r1 + r2 r1 c1 ?(r1 ?r2 + r2 ?rx + rx ?r1) r1 + r2 r1 + r2 r1 1 + {s ?c1 ?(r1 ?r2 + r2 ?rx + rx ?r1) / (r1 + r2)} 1 + s ?c1 ?(r2 + rx)
? 16 CXA2511AQ 4. music sensor a m p 2 t a p e i n 2 a m p 3 a m p 1 v c c v c c m s l p f 1 r 1 1 0 k v g s r 2 1 0 k r 3 1 2 7 k 1 r 5 3 9 . 1 k c 1 6 4 p r 6 1 k r 7 1 1 . 1 k d v c c r 1 1 m s o u t m s t c r 1 0 c 4 g 2 f b r 9 c 3 g 1 f b r 8 c 2 t a p e i n 1 r 4 1 0 0 k d g n d d g n d d g n d f u l l - w a v e r e c t i f i e r s m o o t h e r d e t e c t i o n l e v e l ( d b m ) 3 9 . 5 g 1 ( f f ) 8 7 0 8 7 f r e q u e n c y [ h z ] 5 9 . 5 g 2 ( n o r ) fig. 5. music sensor block diagram the signal input from tapein is added and amplified by amp1. this signal is then input to the lpf (r4 and c1). the lpf cut-off frequency can be adjusted by connecting the external capacitance to mslpf pin. the cut-off frequency is approximately 23khz when mslpf pin is left open. the detection level and hpf cut-off frequency are determined with the external resistance and capacitance connected to g1fb or g2fb at amp2, and the signal is converted to a current. the signal is full-wave rectified and is converted to a voltage by the internal resistance r5. the full-wave rectified signal is smoothed. the internal resistance (r6) and external capacitance (c4) determine the smoothing response time. the recovery time is determined by the external resistance (r10) and capacitance (c4). the amp3 comparator detects whether the smoothed signal is greater or smaller than the comparator threshold. the comparator has approximately 2db hysteresis. the table below shows the example of the constant and characteristics for the external resistance and capacitance connected to g1fb and g2fb. fig. 6. music sensor circuit frequency response r c signal detection level music signal interval detection level cut-off frequency ff/rew (g1) playback (g2) 39k 3.9k 0.0047 f 0.47 f ?9.5dbm ?9.5dbm ?1.4dbm ?1.4dbm 870hz 87hz
? 17 CXA2511AQ 5. operating mode control method the CXA2511AQ has a dolby nr mode select switch (nrmode), dolby nr switch (nrsw), playback equalizer amplifier select switch (tapesw), head input select switch (drsw), music sensor mode select switch (msmode) and music sensor switch (mssw). the operating modes for each switch are shown in the following table. low (open) high dolby b type nr dolby nr off tape 120 s pbin forward g1 ms on 15 16 17 18 19 20 21 nrmode nrsw insw tapesw drsw msmode mssw dolby c type nr dolby nr on aux 70 s pbin reverse g2 ms off pin voltage pin no. pin name notes on operation 1. dolby nr dolby nr functions by using the current that flows into diref (pin 25) as standard. the dolby nr attack/recovery time is determined by the capacitance connected to tch (pins 8 and 23) and tcl (pins 9 and 22). use the parts connected to these pins with high accuracy and small temperature characteristics. (it is recommended that the resistance tolerance of 2% and capacitance tolerance of 10% .) 2. playback equalizer amplifier all playback equalizer amplifier characteristics are determined by the external constants. use the parts which satisfies the accuracy required for the playback equalizer amplifier. 3. music sensor the current on diref (pin 25), and the resistance and capacitance connected to g2fb (pin 10) and g1fb (pin 11) determine the detection level and the hpf cut-off frequency. the response time is determined by the resistance and capacitance connected to mstc (pin 12). use the parts which satisfies the accuracy required for the music sensor.
? 18 CXA2511AQ example of representative characteristics c u r r e n t c o n s u m p t i o n v s . s u p p l y v o l t a g e 2 0 1 9 1 8 7 . 0 8 . 0 9 . 0 1 0 . 0 1 1 . 0 s u p p l y v o l t a g e [ v ] c u r r e n t c o n s u m p t i o n [ m a ] n o i n p u t s i g n a l n r o f f , m s o n t a = 2 5 c p l a y b a c k e q u a l i z e r a m p l i f i e r f r e q u e n c y r e s p o n s e 1 0 0 1 k 1 0 k f r e q u e n c y [ h z ] 3 0 4 0 5 0 g a i n [ d b ] 6 0 1 2 0 s v c c = 8 . 0 v o u t p u t l e v e l o f 2 5 d b m c o n s t a n t t a = 2 5 c 7 0 s p b f i n 1 p b r e f 6 8 0 7 0 s p b o u t 1 p b e q 1 1 8 k 1 2 k 3 0 0 k 0 . 0 1 2 . 2 2 7 0 p b r e f p b f b 1 4 7 b t y p e d e c o d e b o o s t c h a r a c t e r i s t i c s f r e q u e n c y [ h z ] 1 0 k 1 k 1 0 0 0 2 4 6 8 1 0 1 2 d e c o d e b o o s t [ d b ] v c c = 8 . 0 v 0 d b = d o l b y l e v e l 4 0 d b 3 0 d b 2 0 d b 1 0 d b 0 d b t a = 2 5 c c t y p e d e c o d e b o o s t c h a r a c t e r i s t i c s f r e q u e n c y [ h z ] 1 0 k 1 k 1 0 0 4 0 4 8 1 2 1 6 2 0 d e c o d e b o o s t [ d b ] v c c = 8 . 0 v 0 d b = d o l b y l e v e l t a = 2 5 c 6 0 d b 5 0 d b 4 0 d b 3 0 d b 2 0 d b 1 0 d b 0 d b f i g . 7 . m e a s u r e m e n t c i r c u i t o f p l a y b a c k e q u a l i z e r a m p l i f i e r f r e q u e n c y r e s p o n s e
? 19 CXA2511AQ t o t a l h a r m o n i c d i s t o r t i o n ( p l a y b a c k e q u a l i z e r a m p l i f i e r ) 2 0 1 6 1 2 8 4 0 4 8 o u t p u t l e v e l [ d b m ] 1 0 2 1 0 1 1 0 0 t o t a l h a r m o n i c d i s t o r t i o n [ % ] t a = 2 5 c f = 1 0 k h z f = 1 0 0 h z f = 1 k h z b t y p e t o t a l h a r m o n i c d i s t o r t i o n ( i n c l u d i n g n r o f f ) o u t p u t l e v e l [ d b m ] 1 0 1 0 2 t o t a l h a r m o n i c d i s t o r t i o n [ % ] t a = 2 5 c 6 2 2 6 1 0 1 4 1 0 1 1 0 0 n r b f = 1 k h z n r b f = 1 0 k h z n r b f = 1 0 0 h z n r o f f f = 1 k h z c t y p e t o t a l h a r m o n i c d i s t o r t i o n o u t p u t l e v e l [ d b m ] 1 0 1 0 1 t o t a l h a r m o n i c d i s t o r t i o n [ % ] i n p u t : t a p e i n 1 o u t p u t : l i n e o u t 1 v c c = 8 . 0 v r l = 2 . 7 k w 0 d b = d o l b y l e v e l i n p u t : t a p e i n 1 o u t p u t : l i n e o u t 1 v c c = 8 . 0 v r l = 2 . 7 k w 0 d b = d o l b y l e v e l t a = 2 5 c 6 2 2 6 1 0 1 4 1 0 0 1 0 1 n r c f = 1 k h z n r c f = 1 0 k h z n r c f = 1 0 0 h z v c c = 8 . 0 v i n p u t : p b f i n 1 o u t p u t : p b o u t 1 r l = 2 . 7 k w v c c = 8 . 0 v i n p u t : p b f i n 1 o u t p u t : p b o u t 1 r l = 2 . 7 k w i n p u t : t a p e i n 1 o u p t u t : l i n e o u t 1 v c c = 8 . 0 v r l = 2 . 7 k w 0 d b = d o l b y l e v e l i n p u t : t a p e i n 1 o u p t u t : l i n e o u t 1 v c c = 8 . 0 v r l = 2 . 7 k w 0 d b = d o l b y l e v e l
? 20 CXA2511AQ r i p p l e r e j e c t i o n r a t i o ( p b o u t ) 1 0 0 1 k 1 0 k f r e q u e n c y [ h z ] 6 0 5 0 4 0 r i p p l e r e j e c t i o n r a t i o [ d b ] t a = 2 5 c v c c = 8 . 0 v r l = 2 . 7 k w v c c = 8 . 0 v r l = 2 . 7 k w t a = 2 5 c v c c = 8 . 0 v r l = 2 . 7 k w v c c = 8 . 0 v r l = 2 . 7 k w r i p p l e r e j e c t i o n r a t i o ( l i n e o u t ) 1 0 0 1 k 1 0 k f r e q u e n c y [ h z ] 4 0 3 0 2 0 r i p p l e r e j e c t i o n r a t i o [ d b ] 5 0 n r o f f n r c n r b c r o s s t a l k b e t w e e n c h a n n e l s ( 1 c h ? 2 c h ) 1 0 0 f r e q u e n c y [ h z ] 6 0 4 0 0 c r o s s t a l k [ d b ] 1 2 0 2 0 8 0 1 0 0 v c c = 8 . 0 v i n p u t : p b f i n 1 o u t p u t : l i n e o u t 2 ( l i n e o u t 1 o u t p u t l e v e l = 0 d b m ) n r o f f v c c = 8 . 0 v i n p u t : p b f i n 1 o u t p u t : l i n e o u t 2 ( l i n e o u t 1 o u t p u t l e v e l = 0 d b m ) n r o f f 1 k 1 0 k m u s i c s i g n a l a n d s i g n a l i n t e r v a l d e t e c t i o n l e v e l f r e q u e n c y r e s p o n s e 1 0 0 1 k 1 0 k f r e q u e n c y [ h z ] 4 0 1 0 0 i n p u t l e v e l [ d b m ] 6 0 2 0 3 0 5 0 m u s i c s i g n a l i n t e r v a l d e t e c t i o n l e v e l m u s i c s i g n a l d e t e c t i o n l e v e l m u s i c s i g n a l i n t e r v a l d e t e c t i o n l e v e l m u s i c s i g n a l d e t e c t i o n l e v e l g 2 g 1 t a = 2 5 c h p f c o n n e c t i o n r e s i s t a n c e i n m s b l o c k v s . m u s i c s i g n a l a n d s i g n a l i n t e r v a l d e t e c t i o n l e v e l c h a r a c t e r i s t i c s 1 k 1 0 k 1 0 0 k h p f c o n n e c t i o n r e s i s t a n c e [ w ] 5 0 4 0 3 0 i n p u t l e v e l [ d b m ] 6 0 m u s i c s i g n a l i n t e r v a l d e t e c t i o n l e v e l 7 0 v c c = 8 . 0 v f = 5 k h z i n p u t : t a p e i n 1 m u s i c s i g n a l d e t e c t i o n l e v e l p b f i n 1 p b r e f 6 8 0 p b o u t 1 p b e q 1 2 7 0 p b r e f 4 7 1 2 k 3 0 0 k 2 4 d b t a p e i n 1 l i n e o u t 1 2 . 2 f i g . 8 . m e a s u r e m e n t c i r c u i t o f c r o s s t a l k b e t w e e n c h a n n e l s v c c = 8 . 0 v i n p u t : t a p e i n 1 g 1 : r = 3 9 k w , c = 4 . 7 n f g 2 : r = 3 . 9 k w , c = 0 . 4 7 f v c c = 8 . 0 v i n p u t : t a p e i n 1 g 1 : r = 3 9 k w , c = 4 . 7 n f g 2 : r = 3 . 9 k w , c = 0 . 4 7 f t a = 2 5 c
? 21 CXA2511AQ package outline unit: mm s o n y c o d e e i a j c o d e j e d e c c o d e p a c k a g e m a t e r i a l l e a d t r e a t m e n t l e a d m a t e r i a l p a c k a g e w e i g h t e p o x y r e s i n s o l d e r / p a l l a d i u m c o p p e r / 4 2 a l l o y p a c k a g e s t r u c t u r e p l a t i n g 0 . 2 g q f p - 4 0 p - l 0 1 * q f p 0 4 0 - p - 0 7 0 7 4 0 p i n q f p ( p l a s t i c ) 9 . 0 0 . 4 + 0 . 4 0 . 3 0 . 1 0 . 6 5 1 1 0 1 1 2 0 2 1 3 0 3 1 4 0 1 . 5 0 . 1 5 + 0 . 3 5 0 . 1 2 7 0 . 0 5 + 0 . 1 ( 8 . 0 ) a a d e t a i l 0 . 1 0 . 1 + 0 . 1 5 + 0 . 1 5 7 . 0 0 . 1 0 . 5 0 . 2 0 . 1 m 0 . 1 2 n o t e : p a l l a d i u m p l a t i n g t h i s p r o d u c t u s e s s - p d p p f ( s o n y s p e c . - p a l l a d i u m p r e - p l a t e d l e a d f r a m e ) .

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