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any and all sanyo products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft? control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. consult with your sanyo representative nearest you before using any sanyo products described or contained herein in such applications. sanyo assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all sanyo products described or contained herein. monolithic linear ic pll fm mpx stereo demodulator with adjustment-free vco and measure against adjacent channel interference ordering number:enn2393 LA3450 sanyo electric co.,ltd. semiconductor company tokyo office tokyo bldg., 1-10, 1 chome, ueno, taito-ku, tokyo, 110-8534 japan 21500th (kt)/2187ta no.2393C1/15 package dimensions unit:mm 3029a-dip28s [LA3450] sanyo : dip28s overview the LA3450 is a multifunctional, high-performance fm multiplex demodulator ic designed for high-grade fm ste- reo tuner use. the LA3450 features adjustment-free vco, measure against adjacent channel interference, pilot can- celer, low distortion (0.005%), and high s/n (101db). applications ? home stereo, cd, av-use pll fm mpx stereo demodu- lator ic with adjustment-free vco. functions ? pll multiplex stereo demodulator. ? adjustment-free vco. ? measure against adjacent channel interference. ? pilot canceler. ? cal-tone signal generator. ? am/fm input, am/fm selector. ? post amplifier (gain variable type). ? vco stop. ? right/left independent adjustment of separation (single adjustment available). features ? adjustmet-free vco : eliminates the need to adjust free- running frequency. ? good temperature characteristics of vco : 0.1% typ. for 50 c change. ? no antibirdie filter is required because a measure is taken against adjacent channel interference. ? less carrier leak 19khz : 53db 38khz : 50db ? the on-chip cal-tone signal generator facilitates applica- tion of recording calibrator. ? low distortion mono 0.005% stereo 0.015% ? high s/n 101db typ. mono ihf-a bpf ? high voltage gain fm : 10db (gain variable) am : 16db (gain variable) ? wide dynamic range output level 3.3v typ. (thd=1%, mono) 0.48 2.03 1.78 27.2 0.25 10.16 8.6 1 14 28 15 0.95 4.25 3.2 4.95max 0.51min
LA3450 no.2393C2/15 specifications absolute maximum ratings at ta = 25?c ?c ?c operating conditions at ta = 25?c electrical characteristics at ta = 25?c, v cc =13v, input : 400mv, f=1khz, l+r=90%, pilot=10% (note 1) : the capture range is represented by the value in 19khz equivalent. (note 2) : the low-pass filter used to measure electrical characteristics must have 19khz attenuation of C90db or more negative value of db and 38khz attenuation of C70db or more negative value of db. (note 3) : be carefull that the combination of pin 22 ? and the others causes dielectric breakdown easily. 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 6 1v t n e r r u c e v i r d p m a li l x a m 0 3a 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 8 6w m e r u t a r e p m e t g n i t a r e p or p o t 0 7 + o t 0 2 C e r u t a r e p m e t e g a r o t sg t s t 5 2 1 + o t 0 4 C 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 3 1v e g a t l o v g n i t a r e p ov c c p o 5 1 o t 0 1v e g a t l o v l a n g i s t u p n i d e d n e m m o c e rv i 0 0 4v m 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 t n e r r u c t n e c s e i u qo c c it u p n i o n9 29 3a m e c n a t s i s e r t u p n ii rn o m m o c t u p n i m a , m f4 10 26 2k w n o i t a r a p e s l e n n a h cp e s z h 0 0 1 = f0 5b d z h k 1 = f5 40 6b d z h k 0 1 = f0 5b 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 o n o m m f5 0 0 . 05 0 . 0% n i a m m f5 1 0 . 08 0 . 0% t u p n i v m 0 0 2 m a2 0 . 08 0 . 0% l e v e l t u p n i e l b a w o l l ax a m n i v % 1 = d h t , o n o m m f0 0 80 0 2 1v m m a0 0 40 0 6v m e g a t l o v t u p t u oo v o n o m m f0 7 70 0 1 10 0 5 1v m t u p n i v m 0 0 2 m a0 7 70 0 1 10 0 5 1v m o i t a r e s i o n - o t - l a n g i sn / sf p b a - f h i o n o m0 91 0 1b d n o i t c e j e r e s i o n e i d r i br bz h k 5 1 1 = s f , v m 0 0 1 = s v , l a n g i s s u o i r u p s0 4b d k a e l r e i r r a c z h k 9 1l c 9 1 s i s a h p m e - e d , r e l e c n a c3 5b d k a e l r e i r r a c z h k 8 3l c 8 3 s i s a h p m e - e d0 5b d k l a t s s o r ct c m a ? v m 0 0 2 t u p n i m a , m f0 70 8b d m f ? v m 0 0 4 t u p n i m f , m a0 70 8b d e c n a l a b l e n n a h cb co n o m m f01b d y c n e u q e r f c s o e n o t - l a c 0 0 4z h e g a t l o v t c e l e s m f / m av m f - m a m a ? 6 2 n i p o t d e i l p p a e g a t l o v , m f5 . 0v m f ? 6 2 n i p o t d e i l p p a e g a t l o v , m a5 . 2v e g a t l o v p o t s o c v 0 1 n i p o t d e i l p p a e g a t l o v5 . 2v l e v e l g n i t h g i l p m a lv l l e v e l t o l i p45 . 73 1v m s i s e r e t s y h p m a ly h 5 . 3b d ) 1 e t o n ( e g n a r e r u t p a c v m 0 3 t o l i p2 . 1 %
LA3450 no.2393C3/15 internal block diagram typical value of voltage on each pin and pin name . o n n i pe u l a v . p y te m a n n i ps k r a m e r 1v 7 . 5t u p t u o r e i f i l p m a e t i s o p m o ck 1 e c n a t s i s e r t u p t u o w 2Cc s o 3v 6 . 2r e t l i f p o o l 4v 6 . 2r e t l i f p o o l 5v 6 . 2t u p n i l l p 6v 6 . 2r e t l i f n o i t c e t e d c n y s t o l i p 7v 6 . 2r e t l i f n o i t c e t e d c n y s t o l i p 8v 6 . 2r e t l i f n o i t c e t e d c n y s t o l i pl e c n a c t o l i p r o f 9v 6 . 2r e t l i f n o i t c e t e d c n y s t o l i pl e c n a c t o l i p r o f 0 1C p o t s o c vk 0 2 1 e c n a t s i s e r t u p n i w 1 1C l e c n a c t o l i p p u - w o l l o f l e v e l , t u p t u o e v a w r a l u g n a i r t 2 1v 8 . 3l o r t n o c e n o t - l a c . e t a t s n o t a e g a t l o v y b d e t n e s e r p e r s i e g a t l o v n i p 3 1C r o t a c i d n i o e r e t sr o t c e l l o c n e p o 4 10d n g 5 1C t u p t p u o c s o e n o t - l a c 6 1v 7 . 5t u p n i e n o t - l a c 7 1v 7 . 5t u p n i l e c n a c t o l i p 8 1v 7 . 5t u p t u o r e f i l p m a t s o pt u p t u o l 9 1v 7 . 5t u p n i r e i f i l p m a t s o pt u p n i ) C ( , t u p n i l 0 2v 7 . 5t u p t u o r e f i l p m a t s o pt u p t u o r 1 2v 7 . 5t u p n i r e i f i l p m a t s o pt u p n i ) C ( , t u p n i r 2 2v 7 . 5t n e m t s u j d a n o i t a r a p e s 3 2v 7 . 5t u p n i m ak 0 2 e c n a t s i s e r t u p n i w f @ 456khz f @ 400hz continued on next page.
LA3450 no.2393C4/15 continued from preceding page. . o n n i pe u l a v . p y te m a n n i ps k r a m e r 4 2v 7 . 5t u p n i m fk 0 2 e c n a t s i s e r t u p n i w 5 20 d n g l a n g i s 6 2C n o i t c e l e s m f / m ak 0 2 1 e c n a t s i s e r t u p n i w 7 2v 7 . 5f e r ve g a t l o v e c n e r e f e r 8 2v c c y l p p u s r e w o p sample application circuit (1) input separation 3 0.92 x : csb456f11 (murata) kbr-457hs (kyocera) * : input pilot level 20mv or greater : 0.47 m f 14mv or greater : 0.22 m f 8mv or greater : c3=0.1 m f, r1=6.8k w , c4=0.47 m f * : input separation (sub signal/main signal) 3 0.92 (f=1khz) how to make single adjustmet of separation
LA3450 no.2393C5/15 sample application circuit (2) input separation 0.92 x : csb456f11 (murata) kbr-457hs (kyocera) * : input pilot level 20mv or greater : 0.47 m f 14mv or greater : 0.22 m f 8mv or greater : c3=0.1 m f, r1=6.8k w , c4=0.47 m f * : input separation (sub signal/main signal) 3 0.92 (f=1khz) how to make single adjustmet of separation
LA3450 no.2393C6/15 sample application circuit (3) pilot sine wave cancel x : csb456f11 (murata) kbr-457hs (kyocera) * : input pilot level 20mv or greater : 0.47 m f 14mv or greater : 0.22 m f 8mv or greater : c3=0.1 m f, r1=6.8k w , c4=0.47 m f * : input separation (sub signal/main signal) 0.92 (f=1khz) for the separation adjusting method when the input separation is more than 0.92, see sample application circuit (2). (note 1) in this sample application circuit, the dc voltage on pins 11, 17 is almost equal to that on pin 27 and no dc cut capacitor (c8 in sample application circuint (1) , (2) ) is required.
LA3450 no.2393C7/15 description of external parts name symbol kind value remarks capacitor c1 ceramic 100 to 1000pf inprovement in stereo low-frequency distortion (note1) c2 polyester film 0.047 m f dc cut c3 electrolytic 0.1 to 0.47 m f loop filter, input pilot 8mv or greater : 0.1 m f 14mv or greater : 0.22 m f 20mv or greater : 0.47 m f c4 electrolytic 0.47 m f to 1 m f loop filter, input pilot 8mv or greater : 0.47 m f 14mv or greater : 1 m f c5 electrolytic 1 m f sync detection filter c6 electrolytic 1 m f sync detection filter c7 polyester film 0.01 m f for integration (generation of triangular wave) c8 polyester film 0.01 m f dc cut c9 electrolytic 0.47 m f for integration (generation of triangular wave) c10 electrolytic 0.47 m f dc cut c11 to 12 ceramic 510pf de-emphasis capacitor, r5. c11=50 m s (75 m s) r4. c12=50 m s (75 m s) c13 electrolytic 10 m f dc cut c14 electrolytic 33 m f dc cut c15 electrolytic 100 m f filter, s/n improvement c16 electrolytic 100 m f power filter c17 to 18 electrolytic 10 m f dc cut c19 ceramic 1000pf lpf for sub signal attenuation c20 to 21 ceramic 100pf improvement in separation at high frequencies (note 2) c22 ceramic 4700pf 19khz tank circuit (generation of sine wave) resistor r1 carbon 3.3 to 6.8k w loop filter, input pilot 8mv or greater : 6.8k w 14mv or greater : 3.3k w r2 carbon 10k w fixing of cal-tone osc frequency r3 carbon 1k w limiting resistor r4 to 5 carbon 100k w post amplifiler feedbak resistor, de-emphasis resistor r6 to 7 carbon 100k w for separation adjustment r8 to 9 carbon 3.3k w lpf input resistor (note 3) r10 to 11 carbon 3.3k w lpf output resistor r12 carbon 2k w lpf for sub signal attenuation r13 carbon 10k w generation of pilot cancel signal semifixed vr1 carbon 30k w pilot cancel adjustment resistor vr2 to 3 carbon 1m w separation adjustment resonator x ceramic csb456f11 (murata), kbr-457hs (kyocera) diode d1 silicon (low leak) improvement in stereo start time after vco stop release coil l1 15mh 19khz tank circuit (generation of sine wave) note 1 : c1 differs with set models. capacitor used to phase the sub signal of the decoder with the reproduction sub signal in the pll. note 2 : c20 to 21 are set to the optimum value according to each set mode. note 3 : the lpf input resistor value is 3.3k w or greater.
LA3450 no.2393C8/15 sample printed circuit pattern proper cares in applications 1. ceramic resonator shown below are ceramic resonators recommended for use in the LA3450 and their suppliers. csb456f11 murata piezoelectric division tel : 0762-40-2381 kbr-457hs kyocera electronic parts division tel : 075-592-3851 2. loop filter constants loop filter constants (c3, c4, r1) connected to pins 3, 4 must be set to the optimum value according to an input pilot level. the recommended values are shown in table 1. table 1. input pilot level C loop filter constants note : for example, when the loop filter constants are c3=0.22 m f, c4=1 m f, r1=3.3k w , stereo operation can be per- formed with an input pilot level of 14mv or greater, even with the temperature characteristics of the osc circuit, the initial tolerance and secular chage of a ceramic resonator considerd. l e v e l t o l i p t u p n i3 c4 c1 r r e t a e r g r o v m 0 2f 7 4 . 0f 1k 3 . 3 w r e t a e r g r o v m 4 1f 2 2 . 0f 1k 3 . 3 w r e t a e r g r o v m 8f 1 . 0f 7 4 . 0k 8 . 6 w
LA3450 no.2393C9/15 3. vco stop method vco osc can be stopped and the forced monaural mode is entered by applying a voltage of 2.5v or greater to pin 10. the maximum voltage to be applied to pin 10 is 16v regardless of the voltage on pin 28 (v cc pin). the relation between applied voltage and flow-in current is shown in fig. 1. fig. 1. voltage applied to pins 10, 26 C flow-in current 4. forced monaural mode connecting pin 16 to gnd through a resistor of 10k w causes the forced monaural mode to be entered. 5. am/fm mode select method the am/fm mode can be selected by applying a voltage to pin 26. when the voltage on pin 26 is 0.5v or less, the fm mode is entered, and when 2.5v or greater, the am mode is enterd. in am mode the vco stops and the forced monaural mode is entered. the relation between voltage on pin 26 and flow-in current is as shown in fig. 1. 6. separation adjust method the separation is adjusted by varying the gain of the main signal with vr2, vr3 as shown in the sample application circuit. sample application circuit (1) or (2) is used according to the attenuation of the input sub signal. when the attenuation ratio of the sub signal to the main signal is 0.92 or greater to 1, use sample application circuit (1), and when 0.92 or less to 1, use sample application circuit (2). capacitors c20 and c21, which are used to improve the separation characteristic at high frequencies, must be set to the optimum values according to your model set. 7. cal-tone the osc frequency can be set with r2, c9 in the sample application circuit (refer to fig. 2). the osc level can be attenuated on connecting resistor rx across pin 15 and pin 16 (refer to fig. 3). when tthe s2 is turned on, the triangular wave generated on pin 15 is amplified by the post amplifier and output. the level at pins 18, 20 is approximately 4v (p-p) when the typical constants are used in the sample application circuit and the output level becomes approxi- mately 4x20/ (rx+20) v (p-p) by connecting rx. fig. 3. osc level variable
LA3450 no.2393C10/15 8. v o C i o characteristic at pin 27 fig. 4 shows v o C i o characteristic at pin 27 (i o : capable of being drawn to the outside) maximum current : 3ma 9. feedback resistance of post amplifier and total gain, de-emphasis constants table 2 shows the feedback resistance of post amplifier and the total gain, de-emphasis constants. total gain : at monaural mode, r4 c12=r5 c11=50 m s, 75 m s table 2. feedback resistance of post amplifier and of total gain, de-emphasis constants 10. low-pass filter figs. 5, 6 show a sample circuit configuration and characteristic of the low-pass filter. fig. 5 sample circuit of lc filter ) 5 r ( 4 rn i a g l a t o ts 0 5 ) 1 1 c ( 2 1 cs 0 5 ) 1 1 c ( 2 1 c k 3 3 w b d 0f p 0 0 5 1f p 0 0 2 2 k 9 3 w b d 5 . 1f p 0 0 2 1f p 0 0 0 2 k 1 5 w b d 4f p 0 0 0 1f p 0 0 5 1 k 2 6 w b d 5 . 5f p 0 5 7f p 0 0 2 1 k 2 8 w b d 8f p 0 2 6f p 0 1 9 k 0 0 1 w b d 0 1f p 0 1 5f p 0 5 7 k 0 3 1 w b d 2 1f p 0 9 3f p 0 6 5 k 0 5 1 w b d 3 1f p 0 3 3f p 0 1 5 k 0 8 1 w b d 5 1f p 0 7 2f p 0 9 3
LA3450 no.2393C11/15 fig. 6 f response note : as the use of this low-pass filter makes the attenuation less at 19khz, 38khz, carrier leak at the lpf output causes the stereo distortion and separation characteristics to get worse than specified in the electric character- istics. for example, the stereo distortion becomes approximately 0.5% due to carrier leak.
LA3450 no.2393C12/15
LA3450 no.2393C13/15
LA3450 no.2393C14/15
specifications of any and all sanyo products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment. sanyo electric co., ltd. strives to supply high-quality high-reliability products. however, any and all semiconductor products fail with some probability. it is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. in the event that any or all sanyo products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of sanyo electric co. , ltd. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equipment, refer to the "delivery specification" for the sanyo product that you intend to use. information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed 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 february, 2000. specifications and information herein are subject to change without notice. LA3450 ps no.2393C15/15

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