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c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 a n p e c r e s e r v e s t h e r i g h t t o m a k e c h a n g e s t o i m p r o v e r e l i a b i l i t y o r m a n u f a c t u r a b i l i t y w i t h o u t n o t i c e , a n d a d v i s e c u s t o m e r s t o o b t a i n t h e l a t e s t v e r s i o n o f r e l e v a n t i n f o r m a t i o n t o v e r i f y b e f o r e p l a c i n g o r d e r s . stereo cap-free line driver a p a 2 1 7 4 f e a t u r e s g e n e r a l d e s c r i p t i o n a p p l i c a t i o n s s e t - t o p b o x e s c d / d v d p l a y e r s l c d t v s h t i b s ( h o m e t h e a t e r i n b o x ) o p e r a t i n g v o l t a g e : 2 . 3 v - 4 . 5 v s u p p l y c u r r e n t - i d d = 5 m a a t v d d = 3 . 3 v l o w s h u t d o w n c u r r e n t - i d d = 1 m a a t v d d = 3 . 3 v g r o u n d r e f e r e n c e o u t p u t - n o o u t p u t c a p a c i t o r r e q u i r e d ( f o r d c b l o c k i n g ) - s a v e t h e p c b s p a c e - r e d u c e t h e b o m c o s t s - i m p r o v e t h e l o w f r e q u e n c y r e s p o n s e o u t p u t v o l t a g e s w i n g c a n r e a c h 2 v r m s / c h i n t o 6 0 0 w a t v d d = 3 . 3 v h i g h p s r r : 9 0 d b a t 2 1 7 h z fast start-up time: 500 m s i n t e g r a t e t h e d e - p o p c i r c u i t r y s e p a r a t e s h u t d o w n f u n c t i o n f o r f l e x i b l e a p p l i c a - t i o n t h e r m a l p r o t e c t i o n s u r f a c e - m o u n t p a c k a g i n g - t q f n 4 x 4 - 2 0 b ( w i t h e n h a n c e d t h e r m a l p a d ) - t s s o p - 1 6 - s o p - 1 4 l e a d f r e e a n d g r e e n d e v i c e s a v a i l a b l e ( r o h s c o m p l i a n t ) s i m p l i f i e d a p p l i c a t i o n c i r c u i t t h e a p a 2 1 7 4 i s a s t e r e o , s i n g l e s u p p l y a n d c a p - f r e e l i n e d r i v e r , w h i c h i s a v a i l a b l e i n t q f n 4 x 4 - 2 0 b , t s s o p - 1 6 , a n d s o p - 1 4 p a c k a g e s . t h e a p a 2 1 7 4 i s a g r o u n d - r e f e r e n c e o u t p u t a n d d o e s n ? t n e e d t h e o u t p u t c a p a c i t o r s f o r d c b l o c k i n g . t h e a d v a n - t a g e s o f e l i m i n a t i n g t h e o u t p u t c a p a c i t o r a r e s a v i n g t h e c o s t , e l i m i n a t i n g c o m p o n e n t h e i g h t , a n d i m p r o v i n g t h e l o w f r e q u e n c y r e s p o n s e . the external gain setting is recommended using from -1v/v to -10v/v. high psrr provides increased immunity to noise and rf rectification. the independent shutdown control of apa2174 is for right channel and left channel. the apa2174 is capable of driving 2vrms at 3.3v into 600 w load, and provides thermal protection. apa2174 rout rin rsd lin lout lsd stereo input signal shutdown control stereo line-out signal
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 2 a p a 2 1 7 4 o r d e r i n g a n d m a r k i n g i n f o r m a t i o n n o t e : a n p e c l e a d - f r e e p r o d u c t s c o n t a i n m o l d i n g c o m p o u n d s / d i e a t t a c h m a t e r i a l s a n d 1 0 0 % m a t t e t i n p l a t e t e r m i n a t i o n f i n i s h ; w h i c h a r e f u l l y c o m p l i a n t w i t h r o h s . a n p e c l e a d - f r e e p r o d u c t s m e e t o r e x c e e d t h e l e a d - f r e e r e q u i r e m e n t s o f i p c / j e d e c j - s t d - 0 2 0 d f o r m s l c l a s s i f i c a t i o n a t l e a d - f r e e p e a k r e f l o w t e m p e r a t u r e . a n p e c d e f i n e s ? g r e e n ? t o m e a n l e a d - f r e e ( r o h s c o m p l i a n t ) a n d h a l o g e n f r e e ( b r o r c l d o e s n o t e x c e e d 9 0 0 p p m b y w e i g h t i n h o m o g e n e o u s m a t e r i a l a n d t o t a l o f b r a n d c l d o e s n o t e x c e e d 1 5 0 0 p p m b y w e i g h t ) . p i n c o n f i g u r a t i o n apa2174 9 l o u t 1 0 v d d 11 rout 12 lin 13 rsd 14 rin 15 gnd 16 lsd pvdd 2 n c 3 c p p 4 p g n d 5 c p n 6 c v s s 7 v s s 8 n c 1 =thermalpad (connected the thermalpad to gnd plane for better heat dissipation) tssop-16 (top view) tqfn4x4-20b (top view) sop-14 (top view) apa2174 gnd 17 lsd 18 pvdd 19 nc 20 nc 16 6 n c 7 v s s 8 n c 9 l o u t 1 0 v d d c p p 1 p g n d 2 c p n 3 n c 4 c v s s 5 1 5 r i n 1 4 r s d 1 3 l i n 1 2 n c 1 1 r o u t c v s s 6 v s s 7 8 l o u t 9 v d d c p p 3 p g n d 4 c p n 5 10 rout 11 lin 12 rsd 13 rin 14 gnd lsd 1 pvdd 2 a p a 2 1 7 4 apa 2174 package code qb : tqfn 4 x 4 - 20 b o : tssop - 16 k : sop - 14 operating ambient temperature range i : - 40 to 85 o c handling code tr : tape & reel assembly material g : halogen and lead free device assembly material handling code temperature range package code apa 2174 qb : apa 2174 xxxxx xxxxx - date code apa 2174 o : apa 2174 xxxxx xxxxx - date code xxxxx - date code apa 2174 k : apa 2174 xxxxx
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 3 a p a 2 1 7 4 a b s o l u t e m a x i m u m r a t i n g s ( n o t e 1 ) symbol parameter rating unit v pvdd _ vdd pvdd to vdd voltage - 0.3 to 0.3 v pgnd _ gnd pgnd to gnd voltage - 0.3 to 0.3 v dd supply voltage ( vdd and pvdd to gnd and pgnd ) - 0.3 to 5.5 v v control input voltage (rsd and lsd to gnd ) gnd - 0.3 to v dd +0.3 v ss vss and cvss to gnd and pgnd voltage - 5.5 to 0.3 v out rout and lout to gnd voltage v ss - 0.3 to v dd +0.3 v cpp cpp to pgnd voltage pgnd - 0.3 to v dd +0.3 v cpn cpn to pgnd voltage v ss - 0.3 to pgnd+0.3 v t j maximum junction temperature 150 t stg storage temperature range - 65 to +150 t s dr maximum soldering temperature range , 10 seconds 260 o c p d power dissipation internally limited w note1: stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recom- mended operating conditions" is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. range symbol parameter min. max. unit v dd supply voltage 2.3 4.5 v ih high level threshold voltage rsd , lsd 1 - v il low level threshold voltage rsd , lsd - 0.35 v r i input resistance 1 47 r f feedback resistance 4.7 100 k w r l load resis tance 500 - w c l maximum capacitive load - 400 pf t a operating ambient temperature range - 40 85 t j operating junction temperature range - 40 125 o c r e c o m m e n d e d o p e r a t i n g c o n d i t i o n s t h e r m a l c h a r a c t e r i s t i c s symbol parameter typical value unit q ja thermal resistance - junction to ambient (note 2) tqfn 4x4 - 20b tssop - 16 sop - 14 45 100 110 o c/w q j c thermal resistance - junction to case (note 3) tqfn 4x4 - 20b 8 o c/w n o t e 2 : p l e a s e r e f e r t o ? l a y o u t r e c o m m e n d a t i o n ? , t h e t h e r m a l p a d o n t h e b o t t o m o f t h e i c s h o u l d s o l d e r e d d i r e c t l y t o t h e p c b ? s t h e r m a l p a d a r e a t h a t w i t h s e v e r a l t h e r m a l v i a s c o n n e c t t o t h e g r o u n d p l a n , a n d t h e p c b i s a 2 - l a y e r , 5 - i n c h s q u a r e a r e a w i t h 2 o z c o p p e r t h i c k n e s s . n o t e 3 : t h e c a s e t e m p e r a t u r e i s m e a s u r e d a t t h e c e n t e r o f t h e t h e r m a l p a d o n t h e u n d e r s i d e o f t h e t q f n 4 x 4 - 2 0 b p a c k a g e .
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 4 a p a 2 1 7 4 apa2174 symbol parameter test condition s min. typ. max. unit i dd supply current - 5 10 ma i sd shutdown current v rsd =v lsd = 0v - 1 5 m a i i input current rsd, lsd - 0. 1 - m a charge pump f osc switching frequency 400 500 600 khz r eq e quivalent resistance - 21 25 w drivers a vo open loop voltage gain 80 100 - db g bw unity gain bandwidth 8 10 - mhz r o output resistance i o =10ma - - 100 w v sr slew rate - 2.5 - v/ m s v os output offset voltage v dd =2.3v to 4.5v, r l = 600 w - 8 - 8 mv v n noise output voltage - 10 20 m vrms v dd =2.3v to 4.5v , v rr =200mvrms f in = 217 hz - 90 - 70 f in = 1k hz - 90 - 70 psrr power supply rejection ratio f in = 20k hz - - 65 - 60 db t start - up start - up time - 500 - m s v esd esd protection outr, outl - 8 - kv thd +n =1% , f in =1khz r l = 600 w 2 2.1 - r l = 100k w 2.3 v dd =4.5v, thd +n =1% , f in =1khz r l = 600 w - 2.9 - v o output voltage (stereo, in phase) r l = 100k w 3.2 vrms thd+n total harmonic distortion p l us noise v o = 2vrms, r l = 600 w f in = 20 h z f in =1 k hz f in = 20k hz - 0.020 0.002 0.020 - % crosstalk channel separation v o = 2vrms, r l = 600 w f in = 20 hz f in =1 k hz f in = 20k hz - 100 90 70 - s/n signal to noise ratio v o = 2vrms, r l = 600 w w ith a - weight ing filter - 105 - db e l e c t r i c a l c h a r a c t e r i s t i c s v d d = 3 . 3 v , v g n d = v p g n d = 0 v , v r s d = v l s d = v d d , c c p f = c c p o = 2 . 2 m f , c i = 1 m f , r i = r f = 1 0 k w , t a = 2 5 o c ( u n l e s s o t h e r w i s e n o t e d )
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 5 a p a 2 1 7 4 t y p i c a l o p e r a t i n g c h a r a c t e r i s t i c s crosstalk vs. frequency c r o s s t a l k ( d b ) frequency (hz) left to right right to left v dd =3.3v r l =600 w a v =-1v/v c i =1 m f v o =2vrms 20 20k 100 1k 10k -140 +0 -120 -100 -80 -60 -40 -20 crosstalk vs. frequency c r o s s t a l k ( d b ) frequency (hz) left to right right to left v dd =3.3v r l =100k w a v =-1v/v c i =1 m f v o =2vrms 20 20k 100 1k 10k -140 +0 -120 -100 -80 -60 -40 -20 t h d + n ( % ) output voltage (v) thd+n vs. output voltage v dd =3.3v v dd =4.5v v dd =2.3v r l =600 w f in =1khz a v =-1v/v 0.001 10 0.01 0.1 1 10m 5 100m 1 t h d + n ( % ) thd+n vs. output voltage v dd =3.3v v dd =4.5v v dd =2.3v r l =100k w f in =1khz a v =-1v/v output voltage (v) 0.0006 10 0.01 0.1 1 10m 5 100m 1 thd+n vs. frequency frequency (hz) v dd =3.3v r l =600 w c i =1 m f a v =-1v/v bw<80khz t h d + n ( % ) v o =2vrms v o =1vrms v o =0.1vrms 20 20k 100 1k 10k 0.0006 1 0.001 0.01 0.1 thd+n vs. frequency frequency (hz) v dd =3.3v r l =100k w c i =1 m f a v =-1v/v bw<80khz t h d + n ( % ) v o =2vrms v o =1vrms v o =0.1vrms 0.0006 1 0.001 0.01 0.1 20 20k 100 1k 10k
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 6 a p a 2 1 7 4 t y p i c a l o p e r a t i n g c h a r a c t e r i s t i c s ( c o n t . ) output noise voltage vs. frequency o u t p u t n o i s e v o l t a g e ( v r m s ) frequency (hz) left channel right channel v dd =3.3v r l =100k w a v =-1v/v c i =1 m f a-weighting 1 m 50 m 10 m 20 20k 100 1k 10k output noise voltage vs. frequency o u t p u t n o i s e v o l t a g e ( v r m s ) frequency (hz) left channel right channel v dd =3.3v r l =600 w a v =-1v/v c i =1 m f a-weighting 1 m 50 m 10 m 20 20k 100 1k 10k frequency response frequency (hz) g a i n ( d b ) p h a s e ( d e g ) v dd =3.3v av=-1v/v r l =600 w c i =1 m f phase gain -3 +1 -2 -1 +0 10 200k 100 1k 10k +140 +220 +160 +180 +200 frequency response frequency (hz) g a i n ( d b ) p h a s e ( d e g ) v dd =3.3v av=-1v/v r l =100k w c i =1 m f phase gain -3 +1 -2 -1 +0 10 200k 100 1k 10k +140 +220 +160 +180 +200 frequency (hz) psrr vs. frequency p o w e r s u p p l y r e j e c t i o n r a t i o ( d b ) v dd =3.3v r l =600 w a v =-1v/v c i =1 m f v rr =0.1v rms left channel right channel -120 +0 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 20 20k 100 1k 10k frequency (hz) psrr vs. frequency p o w e r s u p p l y r e j e c t i o n r a t i o ( d b ) v dd =3.3v r l =100k w a v =-1v/v c i =1 m f v rr =0.1v rms left channel right channel -120 +0 -110 -100 -90 -80 -70 -60 -50 -40 -30 -20 -10 20 20k 100 1k 10k
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 7 a p a 2 1 7 4 t y p i c a l o p e r a t i n g c h a r a c t e r i s t i c s ( c o n t . ) -150 +0 -120 -90 -60 -30 -150 +0 -120 -90 -60 -30 0 2k 400 800 1.2k 1.6k s u p p l y v o l t a g e ( d b v ) o u t p u t v o l t a g e ( d b v ) frequency (hz) gsm power supply rejection vs. frequency g s m p o w e r s u p p l y r e j e c t i o n v s . t i m e v lout v rout 1 2 3 v dd supply voltage (v) s u p p l y c u r r e n t ( m a ) av=-1v/v no load supply current vs. supply voltage 0 1 2 3 4 5 6 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 frequency (hz) output voltage fft vs. frequency o u t p u t v o l t a g e f f t ( d b r ) v dd =3.3v r l =600 w a v =-1v/v vo=-60db to 2vrms -140 +0 -120 -100 -80 -60 -40 -20 0 20k 5k 10k 15k time:2m s/div ch2: v lout , 20mv/div, dc ch3: v rout , 20mv/div, dc ch1: v dd , 500mv/div, dc, offset=3.3v
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 8 a p a 2 1 7 4 o p e r a t i n g w a v e f o r m s r e f e r t o t h e t y p i c a l a p p l i c a t i o n c i r c u i t . t h e t e s t c o n d i t i o n i s v d d = v s d = 3 . 3 v , r l = 6 0 0 w , t a = 2 5 o c , u n l e s s o t h e r w i s e s p e c i f i e d . o u t p u t t r a n s i e n t a t p o w e r o n o u t p u t t r a n s i e n t a t p o w e r o f f ch1: v dd , 1v/div, dc time:2m s/div ch2: v lout , 20mv/div, dc ch3: v rout , 20mv/div, dc ch1: v dd , 1v/div, dc time:2m s/div ch2: v lout , 20mv/div, dc ch3: v rout , 20mv/div, dc v dd v lout v rout 1 2 3 1 2 3 v dd v lout v rout s h u t d o w n r e l e a s e 1 2 3 v sd v lout v rout ch1: v sd , 1v/div, dc time:2m s/div ch2: v lout , 1v/div, dc ch3: v rout , 1v/div, dc l o a d t r a n s i e n t r e s p o n s e ch1: v sd , 1v/div, dc time:2m s/div ch2: v lout , 1v/div, dc ch3: v rout , 1v/div, dc 1 2 3 v lout v rout v sd
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 9 a p a 2 1 7 4 p i n d e s c r i p t i o n pin no. tqfn4x4 - 20b tssop - 16 sop - 14 name i/o/p function 1 4 3 cpp i/o charge pump flying capacitor positive connection . 2 5 4 pgnd p charge pump? s ground . 3 6 5 cpn i/o charge pump flying capacitor negative connection . 4,6,8,12, 16,20 1,3 - nc - no connection. 5 7 6 cvss o charge pump output, connect to the ?vss? . 7 8 7 vss p line driver negative power supply . 9 9 8 lout o lef t channel output for line driver. 10 10 9 vdd p power supply . 11 11 10 rout o right channel output for line drive r. 13 12 11 lin i lef t channel input terminal . 14 13 12 rsd i right channel shutdown mode control input signal, pull low for shutdown the right channel line driver. 15 14 13 rin i right channel input terminal . 17 15 14 gnd p ground connection for cir cuitry. 18 16 1 lsd i left channel shutdown mode control input signal, pull low for shutdown the left channel line driver. 19 2 2 pvdd p charge pump? s power supply . b l o c k d i a g r a m rout lout cpp cpn pvdd rin rsd lin gnd lsd vdd cvss vss pgnd shutdown circuit power and depop circuit charge pump
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 0 a p a 2 1 7 4 t y p i c a l a p p l i c a t i o n c i r c u i t 2.2 m f m f 10 m f shutdown control v dd v dd v ss 2.2 2.2 m f 10k w right channel output left channel output rout lout audio dac shutdown ckt power and depop circuit rout rin rsd charge pump lin lout gnd vdd cpp cpn cvss vss pgnd pvdd lsd 1 m f 1 m f 10k w 10k w 10k w c cpb c cpf c cpo c s c i1 c i2 r i1 r i2 r f1 r f3 1. inverting amplifier 2. secind-order active low-pass filter 2 . 2 10 m f shutdown control v dd 2 . 2 2 . 2 right channel output rout lout audio dac shutdown circuit power and depop circuit rout rin rsd charge pump lin lout gnd vdd cpp cpn cvss vss pgnd pvdd lsd 1 m f 1 m f c cpb c cpf c cpo c s c i 1 c i 2 r i r i r f 1 r f 2 r f 1 r f 2 c f 2 c f 1 c f 2 c f 1 v ss v dd left channel output 220 pf c o 220 pf c o m f m f m f
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 1 a p a 2 1 7 4 f u n c t i o n d e s c r i p t i o n line driver operation f i g u r e 1 : c a p - f r e e l i n e d r i v e r ? s o p e r a t i o n t h e a p a 2 1 7 4 ? s l i n e d r i v e r s u s e a c h a r g e p u m p t o i n v e r t t h e p o s i t i v e p o w e r s u p p l y ( v d d ) t o n e g a t i v e p o w e r s u p p l y ( v s s ) , s e e f i g u r e 1 . t h e l i n e d r i v e r s o p e r a t e a t t h i s b i p o l a r p o w e r s u p p l y ( v d d a n d v s s ) a n d t h e o u t p u t s r e f e r e n c e r e - f e r s t o t h e g r o u n d . t h i s f e a t u r e e l i m i n a t e s t h e o u t p u t c a - p a c i t o r t h a t i s u s i n g i n c o n v e n t i o n a l s i n g l e - e n d e d l i n e d r i v e a m p l i f i e r . c o m p a r e w i t h t h e s i n g l e p o w e r s u p p l y a m p l i f i e r , t h e p o w e r s u p p l y r a n g e h a s a l m o s t d o u b l e d . thermal protection v dd v dd /2 0 v out v dd v ss 0 v out conventional line driver cap-free line driver t h e t h e r m a l p r o t e c t i o n c i r c u i t l i m i t s t h e j u n c t i o n t e m p e r a - t u r e o f t h e a p a 2 1 7 4 . w h e n t h e j u n c t i o n t e m p e r a t u r e e x - c e e d s t j = + 1 5 0 o c , a t h e r m a l s e n s o r t u r n s o f f t h e d r i v e r , a l l o w i n g t h e d e v i c e s t o c o o l . t h e t h e r m a l s e n s o r a l l o w s t h e d r i v e r t o s t a r t - u p a f t e r t h e j u n c t i o n t e m p e r a t u r e d o w n a b o u t 1 2 5 o c . t h e t h e r m a l p r o t e c t i o n i s d e s i g n e d w i t h a 2 5 o c h y s t e r e s i s t o l o w e r t h e a v e r a g e t j d u r i n g c o n t i n u - o u s t h e r m a l o v e r l o a d c o n d i t i o n s , i n c r e a s i n g l i f e t i m e o f t h e i c s . shutdown function i n o r d e r t o r e d u c e p o w e r c o n s u m p t i o n w h i l e n o t i n u s e , t h e a p a 2 1 7 4 c o n t a i n s t w o s h u t d o w n c o n t r o l l e r s t o a l l o w e i t h e r c h a n n e l b e i n g i n d e p e n d e n t a n d e x t e r n a l l y t u r n s o f f t h e a m p l i f i e r b i a s c i r c u i t r y . l s d c o n t r o l s t h e l e f t c h a n n e l a n d r s d c o n t r o l s t h e r i g h t c h a n n e l . t h i s s h u t d o w n f e a - t u r e t u r n s t h e a m p l i f i e r o f f w h e n l o g i c l o w i s p l a c e d o n t h e r s d a n d l s d p i n s f o r t h e a p a 2 1 7 4 . t h e t r i g g e r p o i n t b e - t w e e n a l o g i c h i g h i s 1 . 0 v a n d l o g i c l o w l e v e l i s 0 . 3 5 v . i t i s r e c o m m e n d e d t o s w i t c h b e t w e e n g r o u n d a n d t h e s u p p l y v o l t a g e v d d t o p r o v i d e m a x i m u m d e v i c e p e r f o r m a n c e . b y s w i t c h i n g t h e b o t h r s d a n d l s d p i n s t o a l o w l e v e l , t h e a m p l i f i e r e n t e r s a l o w - c o n s u m p t i o n c u r r e n t c i r c u m s t a n c e , c h a r g e p u m p i s d i s a b l e d , a n d i d d f o r t h e a p a 2 1 7 4 i s i n s h u t d o w n m o d e . t h e c h a r g e p u m p i s e n a b l e d o n c e e i - t h e r r s d o r l s d p i n i s p u l l e d t o h i g h . i n n o r m a l o p e r a t i n g , t h e a p a 2 1 7 4 ? s r s d a n d l s d p i n s s h o u l d b e p u l l e d t o a h i g h l e v e l t o k e e p t h e i c o u t o f t h e s h u t d o w n m o d e . t h e r s d a n d l s d p i n s s h o u l d b e t i e d t o a d e f i n i t e v o l t a g e t o a v o i d u n w a n t e d c i r c u m s t a n c e c h a n g e .
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 2 a p a 2 1 7 4 a p p l i c a t i o n i n f o r m a t i o n second order low pass filter using the apa2174 as a second order, multi-feedback active butterworth filter for audio dacs. the topology is like the figure 2. f i g u r e 2 : a c t i v e b u t t e r w o r t h f i l t e r table 1: the recommended components ? value. a v high pass low pass c i c f1 c f2 r i r f1 r f2 - 1v/v 16hz 40khz 1 m f 100pf 680pf 10k w 10k w 24k w - 1.5v/v 19hz 40khz 1 m f 68pf 680pf 8.2k w 12k w 30k w - 2v/v 11hz 40khz 1 m f 33pf 330pf 15k w 30k w 47k w - 2v/v 11hz 30khz 1 m f 47pf 470pf 15k w 30k w 43k w - 3.3v/v 12hz 30khz 1 m f 33pf 470pf 13k w 43k w 43k w - 10v/v 15hz 30khz 2.2 m f 22pf 1nf 4.7k w 47k w 27k w t h e o v e r a l l g a i n i s : t h e h i g h p a s s f i l t e r ? s c u t o f f f r e q u e n c y i s : ( 1 ) ( 2 ) t h e l o w p a s s f i l t e r ? s c u t o f f f r e q u e n c y i s : ( 3 ) input capacitor, c i c i r i r f figure 3: typical application circuit i n t h e t y p i c a l a p p l i c a t i o n , a n i n p u t c a p a c i t o r , c i , i s r e q u i r e d t o a l l o w t h e a m p l i f i e r t o b i a s t h e i n p u t s i g n a l t o t h e p r o p e r d c l e v e l f o r o p t i m u m o p e r a t i o n . i n t h i s c a s e , c i a n d t h e m i n i m u m i n p u t i m p e d a n c e r i f r o m a h i g h - p a s s f i l t e r w i t h t h e c o r n e r f r e q u e n c y a r e d e t e r m i n e d i n t h e f o l l o w i n g e q u a t i o n : ( 4 ) i i ) c(highpass c r 2 1 f p = the value of c i must be considered carefully because it directly affects the low frequency performance of the circuit. r i is the external input resistance that typical value is 10k w and the specification calls for a flat bass re- sponse down to 20hz. equation is reconfigured as below: ( 5 ) ) c(highpass i i f r 2 1 c p = when the input resistance variation is considered, the c i is 0.8 m f, so a value in the range of 1 m f to 2.2 m f would be chosen. a further consideration for this capacitor is the leakage path from the input source through the input net- work (r i + r f , c i ) to the load. t h i s l e a k a g e c u r r e n t c r e a t e s a d c o f f s e t v o l t a g e a t t h e i n p u t t o t h e a m p l i f i e r t h a t r e d u c e s u s e f u l h e a d r o o m , e s - p e c i a l l y i n h i g h g a i n a p p l i c a t i o n s . f o r t h i s r e a s o n , a l o w l e a k a g e t a n t a l u m o r c e r a m i c c a p a c i t o r i s t h e b e s t c h o i c e . w h e n p o l a r i z e d c a p a c i t o r s a r e u s e d , t h e n e g a t i v e s i d e o f t h e c a p a c i t o r s h o u l d f a c e t h e a m p l i f i e r s ? i n p u t i n m o s t a p p l i c a t i o n s b e c a u s e t h e d c l e v e l o f t h e a m p l i f i e r s ? i n p u t i s h e l d a t g n d . p l e a s e n o t e t h a t i t i s i m p o r t a n t t o c o n f i r m t h e c a p a c i t o r p o l a r i t y i n t h e a p p l i c a t i o n . input resistor, r i t h e g a i n o f t h e a p a 2 1 7 4 i s b e s e t b y t h e e x t e r n a l i n p u t r e s i s t o r ( r i ) a n d e x t e r n a l f e e d b a c k r e s i s t o r ( r f ) . p l e a s e s e e t h e f i g u r e 3 . i i ) c(highpass c r 2 1 f p = 2 f 1 f 2 f 1 f c(lowpass) c c r r 2 1 f p = i f1 v r r a - = c i c f 2 c f 1 = c int + c ext c int = internal capacitance ( 6 pf ) r i r f 1 r f 2 c int c ext 6 pf c out 220 pf
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 3 a p a 2 1 7 4 a p p l i c a t i o n i n f o r m a t i o n ( c o n t . ) input resistor, r i (cont.) ( 6 ) i f v r r ) gain(a = t h e e x t e r n a l g a i n s e t t i n g i s r e c o m m e n d e d u s i n g f r o m - 1 v / v t o - 1 0 v / v , a n d t h e r i i s i n t h e r a n g e f r o m 1 k w t o 4 7 k w . i t ? s r e c o m m e n d e d t o u s e 1 % t o l e r a n c e r e s i s t o r o r b e t t e r . k e e p t h e i n p u t t r a c e a s s h o r t a s p o s s i b l e t o l i m i t t h e n o i s e i n j e c t i o n . t h e g a i n i s r e c o m m e n d e d t o s e t - 1 v / v , a n d r i i s 1 0 k w , a n d r f i s 1 0 k w . feedback resistor, r f refer the figure 3, the external gain is setting by r i and r f ; and the gain setting is recommended using from -1v/v to -10v/v. the r f is in the range from 4.7k w to 100k w . it?s recommended to use 1% tolerance resistor or better. power supply decoupling, c s the apa2174 is a high-performance cmos audio ampli- fier that requires adequate power supply decoupling to ensure the output total harmonic distortion (thd+n) is as low as possible. power supply decoupling also pre- vents the oscillations being caused by long lead length between the amplifier and the speaker. the optimum decoupling is achieved by using two differ- ent types of capacitors that target on different types of noise on the power supply leads. for higher frequency transients, spikes, or digital hash on the line, a good low equivalent-series- resistance (esr) ceramic capacitor, typically 0.1 m f, is placed as close as possible to the de- vice vdd and pvdd lead for the best performance. for filtering lower frequency noise signals, a large alumi- num electrolytic capacitor of 10 m f or greater placed near the audio power amplifier is recommended. charge pump bypass capacitor, c cpb t h e b y p a s s c a p a c i t o r ( c c p b ) r e l a t e s w i t h t h e c h a r g e p u m p s w i t c h i n g t r a n s i e n t . t h e c a p a c i t o r ? s v a l u e i s s a m e a s f l y i n g c a p a c i t o r ( 2 . 2 m f ) . p l a c e i t c l o s e t o t h e p v d d a n d p g n d . charge pump flying capacitor, c cpf t h e f l y i n g c a p a c i t o r a f f e c t s t h e l o a d t r a n s i e n t o f t h e c h a r g e p u m p . i f t h e c a p a c i t o r ? s v a l u e i s t o o s m a l l , t h e n t h a t w i l l d e g r a d e t h e c h a r g e p u m p ? s c u r r e n t d r i v e r c a p a b i l i t y a n d t h e p e r f o r m a n c e o f l i n e d r i v e a m p l i f i e r . i n c r e a s i n g t h e f l y i n g c a p a c i t o r ? s v a l u e w i l l i m p r o v e t h e l o a d t r a n s i e n t o f c h a r g e p u m p . i t i s r e c o m m e n d e d u s i n g t h e l o w e s r c e r a m i c c a p a c i t o r s ( x 7 r t y p e i s r e c o m m e n d e d ) a b o v e 2 . 2 m f . c h a r g e p u m p o u t p u t c a p a c i t o r , c c p o t h e o u t p u t c a p a c i t o r ? s v a l u e a f f e c t s t h e p o w e r r i p p l e d i - r e c t l y a t c v s s ( v s s ) . i n c r e a s i n g t h e v a l u e o f o u t p u t c a p a c i - t o r r e d u c e s t h e p o w e r r i p p l e . t h e e s r o f o u t p u t c a p a c i t o r a f f e c t s t h e l o a d t r a n s i e n t o f c v s s ( v s s ) . l o w e r e s r a n d g r e a t e r t h a n 2 . 2 m f c e r a m i c c a p a c i t o r i s a r e c o m m e n d a t i o n . layout consideration f i g u r e 2 : t q f n 4 x 4 - 2 0 b l a n d p a t t e r n r e c o m m e n d a t i o n 1 . a l l c o m p o n e n t s s h o u l d b e p l a c e d c l o s e t o t h e a p a 2 1 7 4 . f o r e x a m p l e , t h e i n p u t c a p a c i t o r ( c i ) s h o u l d b e c l o s e t o a p a 2 1 7 4 ? s i n p u t p i n s t o a v o i d c a u s i n g n o i s e c o u p l i n g t o a p a 2 1 7 4 ? s h i g h i m p e d a n c e i n p u t s ; t h e d e c o u p l i n g c a p a c i t o r ( c s ) s h o u l d b e p l a c e d b y t h e a p a 2 1 7 4 ? s p o w e r p i n t o d e c o u p l e t h e p o w e r r a i l n o i s e . 2 . t h e o u t p u t t r a c e s s h o u l d b e s h o r t a n d w i d e ( > 2 0 m i l ) , 3 . t h e i n p u t t r a c e s h o u l d b e s h o r t a n d s y m m e t r i c . 4 . t h e p o w e r t r a c e w i d t h s h o u l d b e g r e a t e r t h a n 2 0 m i l . 5 . t h e t q f n t h e r m a l p a d s h o u l d b e s o l d e r e d o n p c b , a n d t h e g r o u n d p l a n e n e e d s s o l d e r e d m a s k ( t o a v o i d s h o r t c i r c u i t ) e x c e p t t h e t h e r m a l p a d a r e a . 2.2mm 2 . 2 m m 0.5mm 0.35mm ground plane for thermalpad thermalvia diameter 0.3mm x 5 4 . 9 m m 0.9mm
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 4 a p a 2 1 7 4 p a c k a g e i n f o r m a t i o n t q f n 4 x 4 - 2 0 b 0 . 70 0 . 098 0 . 028 0 . 002 0 . 50 bsc 0 . 020 bsc s y m b o l min . max . 0 . 80 0 . 00 0 . 18 0 . 30 2 . 00 2 . 70 0 . 05 2 . 00 a a 1 b d d 2 e e 2 e l millimeters a 3 0 . 20 ref tqfn 4 x 4 - 20 b 0 . 35 0 . 45 2 . 70 0 . 008 ref min . max . inches 0 . 031 0 . 000 0 . 008 0 . 012 0 . 079 0 . 098 0 . 079 0 . 014 0 . 018 k 0 . 20 0 . 008 3 . 90 4 . 10 0 . 154 0 . 161 3 . 90 4 . 10 0 . 154 0 . 161 note : 1 . followed from jedec mo - 220 vggd - 5 . e l k e 2 pin 1 corner d 2 a 1 a 3 b a d pin 1 e nx aaa c 0 . 08 0 . 003 aaa
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 5 a p a 2 1 7 4 p a c k a g e i n f o r m a t i o n t s s o p - 1 6 note : 1. follow from jedec mo-153 ab. 2. dimension "d" does not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3. dimension "e1" does not include inter-lead flash or protrusions. inter-lead flash and protrusions shall not exceed 10 mil per side. a 2 a a 1 view a seating plane gauge plane 0 . 2 5 l see view a c d e e 1 b e s y m b o l min. max. 1.20 0.05 0.09 0.20 4.90 5.10 0.15 a a1 c d e e l millimeters b 0.19 0.30 0.65 bsc tssop-16 0.45 0.75 0.026 bsc min. max. inches 0.047 0.002 0.007 0.012 0.004 0.008 0.193 0.201 0.169 0.177 0.018 0.030 6.20 6.60 0.244 0.260 0 0 o 8 o 0 o 8 o 0.006 a2 0.80 1.05 4.30 4.50 e1 0.031 0.041
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 6 a p a 2 1 7 4 p a c k a g e i n f o r m a t i o n s o p - 1 4 s y m b o l min. max. 1.75 0.10 0.17 0.25 0.25 a a1 c d e e1 e h l millimeters b 0.31 0.51 sop-14 0.25 0.50 0.40 1.27 min. max. inches 0.069 0.004 0.012 0.020 0.007 0.010 0.010 0.020 0.016 0.050 0 0.010 1.27 bsc 0.050 bsc a2 1.25 0.049 0 8 0 8 l view a 0 . 2 5 seating plane gauge plane note: 1. follow jedec ms-012 ab. 2. dimension ? d ? does not include mold flash, protrusions or gate burrs. mold flash, protrusion or gate burrs shall not exceed 6 mil per side. 3. dimension ? e ? does not include inter-lead flash or protrusions. inter-lead flash and protrusions shall not exceed 10 mil per side. 3.80 5.80 8.55 4.00 6.20 8.75 0.337 0.344 0.228 0.244 0.150 0.157 d e b e 1 e see view a c h x 4 5 a a 1 a 2
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 7 a p a 2 1 7 4 c a r r i e r t a p e & r e e l d i m e n s i o n s a e 1 a b w f t p0 od0 b a0 p2 k0 b 0 section b-b section a-a od1 p1 h t1 a d application a h t1 c d d w e1 f 330.0 ? 2.00 50 min. 12.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 12.0 ? 0.30 1.75 ? 0.10 5.5 ? 0.05 p 0 p1 p 2 d 0 d1 t a 0 b 0 k 0 tqfn4x4 - 20b 4.0 ? 0.10 8.0 ? 0.10 2.0 ? 0.05 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0.40 4.30 ? 0.20 4.30 ? 0.20 1.30 ? 0.20 application a h t1 c d d w e1 f 330.0 ? 2.00 50 min. 12.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 12.0 ? 0.30 1.75 ? 0.10 5.50 ? 0.05 p 0 p1 p 2 d 0 d1 t a 0 b 0 k 0 tssop - 16 4.00 ? 0.10 8.00 ? 0.10 2.0 0 ? 0.05 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0.40 6.90 ? 0.20 5.40 ? 0.20 1.60 ? 0.20 application a h t1 c d d w e1 f 330.0 ? 2.00 50 min. 16.4+2.00 - 0.00 13.0+0.50 - 0.20 1.5 min. 20.2 min. 16.0 ? 0.30 1.75 ? 0.10 7.50 ? 0.10 p 0 p1 p 2 d 0 d 1 t a 0 b 0 k 0 sop - 14 4.0 ? 0.10 8.0 ? 0.10 2.0 ? 0.10 1.5+0.10 - 0.00 1.5 min. 0.6+0.00 - 0.40 6.40 ? 0.20 9.00 ? 0.20 2.10 ? 0.20 (mm)
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 8 a p a 2 1 7 4 package type unit quantity tqfn4x4 - 20b tape & reel 3000 tssop - 16 tape & reel 2500 sop - 14 tape & reel 2500 t a p i n g d i r e c t i o n i n f o r m a t i o n t q f n 4 x 4 - 2 0 b t s s o p - 1 6 user direction of feed user direction of feed d e v i c e s p e r u n i t
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 1 9 a p a 2 1 7 4 c l a s s i f i c a t i o n p r o f i l e sop-14 user direction of feed t a p i n g d i r e c t i o n i n f o r m a t i o n
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 2 0 a p a 2 1 7 4 table 1. snpb eutectic process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 3 350 <2.5 mm 235 c 22 0 c 3 2.5 mm 220 c 220 c table 2. pb - free process ? classification temperatures (tc) package thickness volume mm 3 <350 volume mm 3 350 - 2000 volume mm 3 >2000 <1.6 mm 260 c 260 c 260 c 1.6 mm ? 2.5 mm 260 c 250 c 245 c 3 2.5 mm 250 c 245 c 245 c r e l i a b i l i t y t e s t p r o g r a m test item method description solderability jesd - 22, b102 5 sec, 245 c holt jesd - 22, a108 1000 hrs, bias @ t j =125 c pct jesd - 22, a102 168 hrs, 100 % rh, 2atm , 121 c tct jesd - 22, a104 500 cycles, - 65 c~150 c hbm mil - std - 883 - 3015.7 vhbm ? 2kv mm jesd - 22, a1 15 vmm ? 200v latch - up jesd 78 10ms, 1 tr ? 100ma profile feature sn - pb eutectic assembly pb - free assembly preheat & soak temperature min (t smin ) temperature max (t smax ) time (t smin to t smax ) ( t s ) 100 c 150 c 60 - 120 seconds 150 c 200 c 60 - 1 2 0 seconds average ramp - up rate (t smax to t p ) 3 c/second ma x. 3 c/second max. liquidous temperature ( t l ) time at l iquidous (t l ) 183 c 60 - 150 seconds 217 c 60 - 150 seconds peak package body temperature (t p ) * see classification temp in table 1 see classification temp in table 2 time (t p ) ** within 5 c of the spec ified c lassification t emperature ( t c ) 2 0 ** seconds 3 0 ** seconds average r amp - down rate (t p to t smax ) 6 c/second max. 6 c/second max. time 25 c to p eak t emperature 6 minutes max. 8 minutes max. * tolerance for peak profile temperature (t p ) is defined a s a supplier minimum and a user maximum. ** tolerance for time at peak profile temperature (t p ) is defined as a supplier minimum and a user maximum. c l a s s i f i c a t i o n r e f l o w p r o f i l e s
c o p y r i g h t ? a n p e c e l e c t r o n i c s c o r p . r e v . a . 6 - d e c . , 2 0 1 1 w w w . a n p e c . c o m . t w 2 1 a p a 2 1 7 4 c u s t o m e r s e r v i c e a n p e c e l e c t r o n i c s c o r p . head office : no.6, dusing 1st road, sbip, hsin-chu, taiwan tel : 886-3-5642000 fax : 886-3-5642050 t a i p e i b r a n c h : 2 f , n o . 1 1 , l a n e 2 1 8 , s e c 2 j h o n g s i n g r d . , s i n d i a n c i t y , t a i p e i c o u n t y 2 3 1 4 6 , t a i w a n t e l : 8 8 6 - 2 - 2 9 1 0 - 3 8 3 8 f a x : 8 8 6 - 2 - 2 9 1 7 - 3 8 3 8

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