2 . 4 w a u di o a m p l i fi e r s t e r e o c m 20 3 8 b i s a n a u d i o a m p l i f i e r o f c l a s s ab w he n c o n n e c t e d t o a 5 v s u pp ly t h d + n l e s s t h a n 1 0% w i ll de li v e r 2 . 4 w t o a 4 l o a d o r 1 . 5 w t o a 8 l o ad . t h e c m 2 038 b i s un i t y - g a i n s t a b l e a n d c an b e c on f i g u r ed b y e x t e r n a l g a i n - s e t t i ng r e s i s t o r s , i t f e a t u r e s a l o w- p o w e r c o n s u m p t i o n s h u t d o w n m o d e w i t h v e r y l o w s h u t d o w n c u r r e n t, and t h e r m a l s h u t d o w n p r o t e c t i o n . i t a l s o u t i l i z e s c i r c u i t r y t o r e d u c e c l i ck s a n d p ops d u r i n g de v i c e t u r n - o n a n d t u r n - o ff . i t c an a l s o b e a p p l i e d i n he a d p hon e f u n c t i on m o d e . 1 . p o w e r o u t pu t a t 5 v s u p p l y , 4 l oa d , t h d + n < 1 0% i s 2 . 4 w . 2 . p o w e r o u t pu t a t 5 v s u p p l y , 8 l oa d , t h d + n < 1 0% i s 1 . 5 w . 3 . o pe r a t i n g s u p p l y v o l t a ge : v d d = 2 . 2 v ~ 5 . 5v 4 . t y p i c a l s h u t d o w n c u rr e n t : 0 . 2ua 5 . i m p r o v e d p o p & c l i c k c i r c u i t r y e l i m i n a t e s n o i s e d u r i ng t u r n - o n a n d t u r n - o f f t r a n s i t i o n s 6 . d i p - 1 6 p a c k age s . t y p i c a l l imi t s y m b ol p a r a m e t e r c o n d i t i on s u n i ts i dd q u i e s c e n t po w e r s u p p l y c u rr e n t v in = 0 v ,i o = 0 a, n o l o a d 6 . 5 1 4 ma i sd s h u t do w n c u rr e n t v sd = v dd 0 . 2 4 . 0 a v s dih s h u t d o w n v o l t age i n p u t h i gh v dd = 5 v 1 . 5 v v s dil s h u t d o w n v o l t age i npu t l o w v dd = 5 v 1 . 3 v v os o u t p u t o ff s e t v o l t a g e v in = 0 v , n o loa d 9 5 0 mv o u t p u t p o w e r ( 8 ? l o a d) 1 . 5 1 . 8 p o o u t p u t p o w e r ( 4 ? l o a d ) t h d + n = 1 0 % ( m a x ) ; f = 1 k hz 2 . 4 2 . 7 w t wu w a k e - u p t i m e 1 0 0 m s t h d + n t o t a l h a r m o n i c d i s t o r t i o n + n o i s e p o = 0 . 5 w r m s ;f = 1 k h z 0 . 3 0 . 6 % CM2038B general description: features: electrical characteristics: free datasheet http:///
ps r r 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 v ripple = 2 0 0 m v - 6 3 ( 2 1 7 h z ) - 77 ( 1 k h z) - 5 5 d b x t a lk c h a n ne l s e p a r a t i on f = 1 k hz c b = 1 . 0 u f - 6 5 - 5 5 d b d i p - 16 CM2038B packaging information: typical application: s h u t d o i w n g n d + o u t a v d d - o u t a - i n a g n d h p - i n g n d + o u t b v d d - o u t b - i n b b y p a s s n c + 5v l in r in c1 c2 r2 r1 r3 r4 c4 20k 20k 20k 20k 1 uf 0 . 3 9 uf 0 . 39 uf c3 1 uf 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 1 2 3 4 5 6 7 8 d i p - 16 n c
CM2038B application information (include headphone mode) l in rin t o c o n t r o l p i n o n h e ad p h o ne j a ck 1 00k 1 00k v dd r 3 2 0k r 1 20k r 2 20k r 4 2 0k c 4 1 uf 0 . 3 9 uf c2 c1 0 . 3 9 uf v dd c 3 1 uf s h u t d o w n g n d + o u t a v d d - o u t a - i n a g n d c h p - i n g n d + o u t b v d d - o u t b - i n b b y p a s s n c t o h p _ i n c i r c u it ring sle e ve c o nt r o l p in h ea d p h o n e j a ck tip c o 10 0 uf 1 ko c o 1 00 uf 1 ko 1 2 3 4 5 6 7 8 1 6 1 5 1 4 1 3 1 2 1 1 1 0 9 d i p - 16 n h p - in - o u ta - o u tb c o 10 0 uf r 13 1 ko c o 1 00 uf r 14 1 ko r 11 10 0 ko r 12 10 0 ko r i ng s l e e ve c o n t r o l p in h e a d ph on e j a ck t ip v dd a p p l i ca t i o n o f h e a dph o n e m o de : i f w i t h no h ea d phone s c o n n e c t ed t o t he hea d p h o n e j a c k , t h e r e i s a l o w v o l t a ge a p p l i e d t o h p - i n p i n , t h i s v o l t a ge p l a c i ng t h e a m p l i f i e r i n b r i d ged m o d e o p e r a t i o n t o d r i v e t h e s p e a k e r s . i f c o n n e c t i n g hea d ph o n e s t o t he hea d p h one j a c k , t h e v o l t a g e a p p l i ed t o h p - i n p i n i s p u l l e d u p t o v dd b y r e s i s t o r r 1 1 , t h i s e n a b l e s t h e h e a dp h o n e f u n c t i on , a n d m u t e s t he b r i dge d s p e a k e r s .
p acka g e i n f o rm a t i on CM2038B
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