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?1 cxa2525am/an e96318c8z rf amplifier for cd player and cd-rom description the cxa2525am/an is an ic for rf signal processing of cd player and cd-rom. features wide-band rf amplifier. (rf signal fc 3 12mhz) rf equalizer (t type) efm time constant can be adjusted (with switching function) apc (automatic power control) function power saving function functions rf summing amplifier rf equalizer focus error amplifier tracking error amplifier apc circuit absolute maximum ratings supply voltage v cc 7v storage temperature tstg ?5 to +150 ? allowable power dissipation p d 500 mw operating conditions supply voltage v cc ?gnd +3.0 to +5.5 v operating temperature topr ?0 to +75 ? applications cd players cd-rom drives 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. cxa2525am 20 pin sop (plastic) cxa2525an 20 pin ssop (plastic)
? 2 cxa2525am/an block diagram l d p d a b c d g n d e f v c a p c _ o n m o d e v c c r f _ m b p f _ s w l p f _ s w r f o _ 1 r f o _ 2 f e t e 2 3 4 5 6 7 8 9 1 0 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 b g r v c b u f f e r 4 0 k 4 0 k v c c 2 5 1 k 1 0 k v c c 5 6 k 1 0 k 5 5 k 5 6 k 1 0 k 1 . 2 5 v a p c s t a n d b y 1 0 k 1 0 k 1 0 k 1 0 k 1 0 k 6 4 k 6 4 k 6 4 k 6 4 k 1 7 4 k 3 4 8 k 3 4 8 k 2 k v c v c c r f s u m m i n g a m p f o c u s e r r o r a m p r f d r i v e a m p v c 1 1 p 5 p 3 2 0 k v c v c 1 1 2 k 7 3 . 4 k 1 1 2 k 4 4 k 4 4 k t r a c k i n g e r r o r a m p t r a c k i n g d r i v e a m p
? 3 cxa2525am/an pin description pin no. symbol i/o equivalent circuit description 1 ld o apc amplifier output. 1 k 1 1 0 k 2 pd i apc amplifier input. 7 gnd ground. 8 k 5 5 k 1 0 k 2 3 4 5 6 a b c d i i i i input of rf summing amplifier and focus error amplifier. 1 0 k 1 0 k 1 0 k 1 0 k 1 0 k 3 4 5 6 1 2 4 1 2 4 1 2 4 1 2 4 6 4 k 6 4 k 6 4 k 6 4 k 3 4 8 k 3 4 8 k
? 4 cxa2525am/an 8 9 11 e f te i i o tracking error amplifier input for pins 8 and 9; tracking error drive output for pin 11. 8 9 1 1 1 2 4 4 4 k 1 1 2 k 1 2 4 4 4 k 1 1 2 k 3 2 0 k 7 3 . 4 k 1 2 4 10 vc o (v cc + gnd) / 2 dc voltage output. 1 2 0 1 2 0 2 5 1 0 12 fe o focus error amplifier output for pin 12. 1 2 3 4 8 k 3 4 8 k 1 2 4 13 rfo_2 o buffer switch output which sets the rf signal time constant. off when pin 19 is connected to v cc , on when it is connected to gnd. 1 2 4 1 3 1 4 14 17 rfo_1 rf_m o i non-inversion input of rf drive amplifier for pin 17; rf signal output for pin 14; resistance value connected between pins 14 and 17 which determines the low frequency gain of rf drive amplifier. 1 4 1 7 1 2 4 2 k 1 k pin no. symbol i/o equivalent circuit description
? 5 cxa2525am/an 15 lpf_sw o transistor switch output which sets the lpf cut-off frequency of rf amplifier. off when pin 19 is connected to v cc , on when it is connected to gnd. 1 5 1 7 1 2 4 1 2 4 16 bpf_sw o transistor switch output which sets the rf amplifier bpf boost. off when pin 19 is connected to v cc , on when it is connected to gnd. 1 2 4 v c 1 6 19 mode i multiple-speed mode switching input. v cc : high multiple-speed mode gnd : low multiple-speed mode 1 2 4 1 9 5 0 k 5 0 k 3 0 k 18 v cc v cc . 20 apc_on i apc amplifier on/off switching. off when connecting to v cc ; on when connecting to gnd. 2 0 1 0 0 k pin no. symbol i/o equivalent circuit description
? 6 cxa2525am/an current consumption current consumption standby current offset voltage offset voltage voltage gain voltage gain voltage gain frequency response frequency response maximum output amplitude h maximum output amplitude l offset voltage voltage gain 1 voltage gain 2 voltage gain difference frequency response 1 frequency response 2 maximum output amplitude h maximum output amplitude l 0v 300mv 300mv 0v 300mv 300mv measure- ment no. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 i cc i ee istb v1-1 v1-2 g1-1 g1-2 g1-3 f1-1 f1-2 v1-2 v1-3 v2-1 g2-1 g2-2 g2-3 f2-1 f2-2 v2-2 v2-3 o o o o o o o o o o o o o o o o o o o o 300mv 300mv 300mv 0v 2.0v ?.0v 2.0v ?.0v ?.0v 2.0v ?.0v 2.0v ?.0v 2.0v ?.0v 18 7 18 14 13 14 14 13 14 13 14 12 ?2 ?0 ?0 16.5 16.5 16.5 ? ? 1.3 ?0 17.7 17.7 ? ? ? 1.9 7.4 ?.4 1.8 ?0 100 20 20 20.3 2.3 ?.3 0 20.7 20.7 0 2.4 ?.3 12 3 120 300 23 23 23.3 ?.3 50 23.7 23.7 3 ?.9 ma ma ma mv mv db db db db db v v mv db db db db db v v pin dc current measurement pin dc current measurement pin dc current measurement pin dc current measurement pin dc current measurement v1 = 100mvpp, f = 100khz v1 = 100mvpp, f = 100khz v1 = 100mvpp, f = 100khz v1 = 100mvpp, f = 12mhz difference for g1-1 v1 = 100mvpp, f = 4mhz difference for g1-2 dc voltage measurement dc voltage measurement dc voltage measurement v1 = 100mvpp, f = 1khz v1 = 100mvpp, f = 1khz g2-1 to g2-2 v1 = 100mvpp, f = 20khz difference for g2-1 v1 = 100mvpp, f = 20khz difference for g2-2 dc voltage measurement dc voltage measurement measurement item symbol sw conditions s1 s2 s3 s4 e1 e2 e3 e4 bias conditions measure- ment point description of output waveform and measurement method min. typ. max. unit rf amplifier fe amplifier electrical characteristics (ta = 25 c, v cc = 2.5v, gnd = vc, v ee = ?.5v)
? 7 cxa2525am/an offset voltage voltage gain 1 voltage gain 2 voltage gain difference frequency response 1 frequency response 2 frequency response 3 frequency response 4 maximum output amplitude h maximum output amplitude l offset voltage 1 offset voltage 2 offset voltage 3 offset voltage 4 offset voltage 5 offset voltage 11 1 10 ?.0v 2.0v ?.0v 0v 69mv 123mv 177mv 0v 0v 300mv 300mv 0v 2.0v ?.0v ?.0v 2.0v 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 v3-1 g3-1 g3-2 g3-3 f3-1 f3-2 f3-3 f3-4 v3-2 v3-3 v4-1 v4-2 v4-3 v4-4 v4-5 v5-1 o o o o o o o o ?0 17.9 17.9 ? ? ? ? ? 1.9 ?.2 0.8 1.8 ?.1 0 20.9 20.9 0 ?.6 0.1 2.1 2.45 50 23.9 23.9 3 ?.9 ?.1 1.6 0 0.1 mv db db db db db db db v v v v v v v v dc voltage measurement v1 = 100mvpp, f = 1khz v1 = 100mvpp, f = 1khz g3-1 to g3-2 v1 = 100mvpp, f = 20khz difference for g3-1 v1 = 100mvpp, f = 20khz difference for g3-2 v1 = 100mvpp, f = 200khz difference for g3-1 v1 = 100mvpp, f = 200khz difference for g3-2 dc voltage measurement dc voltage measurement dc voltage measurement dc voltage measurement dc voltage measurement dc voltage measurement i1 = 0.8madc, dc voltage measurement dc voltage measurement s1 s2 s3 s4 e1 e2 e3 e4 te amplifier apc vc measure- ment no. measurement item symbol sw conditions bias conditions measure- ment point description of output waveform and measurement method min. typ. max. unit
? 8 cxa2525am/an l d p d a b c d g n d e f v c m o d e v c c r f _ m b p f _ s w l p f _ s w r f o _ 1 r f o _ 2 f e t e b g r v c b u f f e r 4 0 k 4 0 k v c c 2 5 1 k 1 0 k v c c 5 6 k 1 0 k 5 5 k 5 6 k 1 0 k a p c s t a n d b y 1 0 k 1 0 k 1 0 k 1 0 k 1 0 k 6 4 k 6 4 k 6 4 k 6 4 k 1 7 4 k 3 4 8 k 3 4 8 k 2 k v c c r f s u m m i n g a m p f o c u s e r r o r a m p r f d r i v e a m p 1 1 p 5 p 3 2 0 k 1 1 2 k 7 3 . 4 k 1 1 2 k 4 4 k 4 4 k t r a c k i n g e r r o r a m p t r a c k i n g d r i v e a m p 1 0 k 1 0 k 1 0 k 1 0 k 3 . 9 k 1 k e 3 e 4 v c c v e e v e e s 1 s 2 s 3 s 4 v 1 e 1 3 3 3 v e e v c c 2 3 4 5 6 7 8 9 1 0 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 i 1 e 2 a p c _ o n 1 5 0 p 5 1 0 1 p 1 . 2 5 v electrical characteristics measurement circuit
? 9 cxa2525am/an l d p d a b c d g n d e f v c m o d e v c c r f _ m b p f _ s w l p f _ s w r f o _ 1 r f o _ 2 f e t e 3 . 9 k 1 p 6 8 p 3 9 0 1 k m o d e v c c 1 0 0 1 0 0 5 0 0 b i n a i n d i n c i n f i n e i n v c 2 2 1 0 1 1 0 0 0 p f o c u s e r r o r o u t t r a c k i n g e r r o r o u t r f o u t 4 7 0 0 p b g r v c b u f f e r 4 0 k 4 0 k v c c 2 5 1 k 1 0 k v c c 5 6 k 1 0 k 5 5 k 5 6 k 1 0 k a p c s t a n d b y 1 0 k 1 0 k 1 0 k 1 0 k 1 0 k 6 4 k 6 4 k 6 4 k 6 4 k 1 7 4 k 3 4 8 k 3 4 8 k 2 k v c v c c r f s u m m i n g a m p f o c u s e r r o r a m p r f d r i v e a m p v c 1 1 p 5 p 3 2 0 k v c v c 1 1 2 k 7 3 . 4 k 1 1 2 k 4 4 k 4 4 k t r a c k i n g e r r o r a m p t r a c k i n g d r i v e a m p 2 3 4 5 6 7 8 9 1 0 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 2 0 1 3 p a p c _ o n v c 3 0 k 1 . 2 5 v application circuit (double-/sextuple-speed switching) 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 .
? 10 cxa2525am/an note on operation the rf ac maximum output amplitude is 1.3 vpp when pin 13 and 14 are capacitor-coupled shown in application circuit. description of operation rf amplifier the signal currents from the photodiodes a, b, c and d are i-v converted, and input to pins 3, 4, 5 and 6. these signals are added at the rf summing amplifier and inverted at the rf drive amplifier and then output to pin 14. the low frequency component of rfo output voltage is as follows: v rfo = (a + b + c + d) = 2.45 (a + b + c + d) focus error amplifier the operation of (b + d) ?(a + c) is performed and the resulting signal is output to pin 12. the low frequency component of fe output voltage is as follows: v fe = (b + d ?a ?c) = 5.43 (b + d ?a + c) a b c d i - v i - v i - v i - v 1 0 k 1 0 k 1 0 k 1 0 k 1 0 k 2 k r f o r f d r i v e a m p v c r f s u m m i n g a m p v c r f _ m 3 4 5 6 1 7 1 4 1 k 1 6 3 . 9 k 3 9 0 4 . 9 k 1 p 1 3 p 6 8 p 1 5 l p f _ s w b p f _ s w 10k 10k 4.9k 2k a b c d i - v i - v i - v i - v 6 4 k 6 4 k 6 4 k 6 4 k 3 4 8 k f o c u s e r r o r a m p 3 4 8 k 1 5 p f e 1 5 p v c 1 7 4 k 3 4 5 6 1 2 348k 64k
? 11 cxa2525am/an tracking error amplifier each signal current from the photodiodes e and f is i-v converted and input to pins 8 and 9. these signals undergo operational amplification at the tracking error amplifier and tracking drive amplifier, and are output to pin 12. the low frequency component of te output voltage is as follows: v te = (f ?e) = 11.1 (f ?e) center voltage generation circuit the center voltage of vr = (v cc + gnd) is supplied. the maximum current is approximately 3ma. apc circuit when the laser diode is driven with constant current, the optical output possesses large negative temperature characteristics. therefore, the current must be controlled with the monitor photodiode to ensure the output remains constant. when apc_on pin is connected to gnd, apc is on; connected to v cc , it is off. e f i - v 4 4 k 3 2 0 k 5 p t e 7 3 . 4 k v c v c 1 1 2 k i - v 4 4 k 1 1 2 k 8 9 1 2 1 1 p 112k 44k 320k 73.4k v r 2 5 v c 4 0 k 4 0 k v c b u f f e r v c c v c c 1 0 p d 1 0 k 5 5 k 5 6 k 1 0 k 2 2 1 0 0 5 0 0 1 0 0 1 0 h 1 l d 1 k 5 6 k v c c 1 0 k 1 2 1 . 2 5 v
? 12 cxa2525am/an example of representative characteristics m o d e = l o w m o d e = h i g h m o d e = l o w m o d e = h i g h 3 0 2 0 1 0 0 1 0 0 k 1 m 1 0 m 1 0 0 m f r e q . [ h z ] g a i n [ d b ] r f o _ 1 f r e q u e n c y r e s p o n s e ( w / o e q ) 3 0 2 0 1 0 0 1 0 0 k 1 m 1 0 m 1 0 0 m f r e q . [ h z ] g a i n [ d b ] r f o _ 2 f r e q u e n c y r e s p o n s e ( w / o e q ) 3 0 2 0 1 0 0 1 k 1 0 k 1 0 0 k 1 m f r e q . [ h z ] g a i n [ d b ] t e _ o u t f r e q u e n c y r e s p o n s e 3 0 2 0 1 0 0 1 0 0 k 1 m 1 0 m 1 0 0 m f r e q . [ h z ] g a i n [ d b ] r f _ o u t f r e q u e n c y r e s p o n s e ( t - e q ) * 3 0 2 0 1 0 0 1 0 0 1 k 1 0 k 1 0 0 k f r e q . [ h z ] g a i n [ d b ] f e _ o u t f r e q u e n c y r e s p o n s e 2 . 5 2 . 0 1 . 5 1 . 0 0 1 0 0 2 0 0 3 0 0 p d [ m v ] l d [ v ] a p c c h a r a c t e r i s t i c s 0 . 5 0 0 . 5 1 . 0 1 . 5 2 . 0 * t - e q a s s h o w n i n a p p l i c a t i o n c i r c u i t
? 13 cxa2525am/an 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 s o p - 2 0 p - l 0 1 * s o p 0 2 0 - p - 0 3 0 0 - a p a c k a g e s t r u c t u r 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 c o p p e r a l l o y s o l d e r p l a t i n g e p o x y / p h e n o l r e s i n 0 . 3 g 2 0 p i n s o p ( p l a s t i c ) 3 0 0 m i l 1 2 . 4 5 0 . 1 + 0 . 4 2 0 1 1 0 . 4 5 0 . 1 1 . 2 7 1 0 1 5 . 3 0 . 1 + 0 . 3 7 . 9 0 . 4 6 . 9 0 . 2 0 . 0 5 + 0 . 1 0 . 5 0 . 2 0 . 1 0 . 0 5 + 0 . 2 1 . 8 5 0 . 1 5 + 0 . 4 0 . 1 5 0 . 1 2 m cxa2525an 2 0 p i n s s o p ( p l a s t i c ) 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 s t r u c t u r 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 0 . 1 g s s o p - 2 0 p - l 0 1 s s o p 0 2 0 - p - 0 0 4 4 0 . 1 0 . 1 0 . 5 0 . 2 0 t o 1 0 d e t a i l a p l a t i n g * 6 . 5 0 . 1 * 4 . 4 0 . 1 0 . 2 2 0 . 0 5 + 0 . 1 0 . 6 5 0 . 1 2 2 0 1 1 1 0 1 a 0 . 1 + 0 . 0 5 1 . 2 5 0 . 1 + 0 . 2 0 . 1 5 0 . 0 2 6 . 4 0 . 2 n o t e : d i m e n s i o n * d o e s n o t i n c l u d e m o l d p r o t r u s i o n . package outline unit: mm cxa2525am 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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