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  l o w p o w e r , 1 2 - b i t c m o s d a c s d a c 3 4 9 d a t a c o n v e r t e r l i n e f e a t u r e s ? 1 2 - b i t s b i n a r y o r 3 - d e c a d e s b d c ? l o w p o w e r : 3 0 0 m w ? c o m m e r c i a l , i n d u s t r i a l a n d m i l - s t d - 8 8 3 m o d e l s ? 5 p i n s e l e c t a b l e o u t p u t r a n g e s d e s c r i p t i o n t h e d a c 3 4 9 s e r i e s a r e v e r s a t i l e , l o w p o w e r 1 2 - b i t d / a c o n v e r t e r s t h a t a r e i n t e n d e d f o r f i x e d r e f e r e n c e a p p l i c a t i o n s . t h e s e u n i t s c o m b i n e a n o v e l c m o s s w i t c h i n g t e c h n i q u e w i t h a p r e c i s i o n , u l t r a - s t a b l e t h i n - f i l m l a d d e r t o a c h i e v e a c c u r a t e c o n v e r s i o n w i t h l o w p o w e r d r a i n ; i m p r o v e d r e l i a b i l i t y a n d n e a r - i n s t a n t a n e o u s w a r m u p a r e m a j o r a d v a n t a g e s o f r e d u c e d p o w e r c o n s u m p t i o n . a l l m o d e l s i n c l u d e a n i n t e r n a l p r e c i s i o n r e f e r e n c e a n d a g a i n - s e l e c t a b l e o u t p u t a m p l i f i e r . t h e d a c 3 4 9 s e r i e s o f f e r s a c h o i c e o f e i t h e r 1 2 - b i t b i n a r y c o d i n g ( - 1 2 m o d e l s ) o r 3 d e c a d e b c d c o d i n g ( - 3 d m o d e l s ) . b y e x t e r n a l p i n j u m p e r i n g , t h e b i n a r y m o d e l s c a n b e c o n n e c t e d f o r u n i p o l a r o u t p u t r a n g e s o f 0 t o ? 5 v o r 0 t o ? 1 0 v a n d f o r o f f s e t b i n a r y c o d e d b i p o l a r o u t p u t s o f 2 . 5 v , 5 v a n d 1 0 v . f o r r a t i o m e t r i c a p p l i c a t i o n s , t h e u n i t s o p e r a t e f r o m a n e x t e r n a l f i x e d d c r e f e r e n c e o f ? 1 0 v 1 0 % . b o t h b i n a r y a n d b c d m o d e l s a r e a v a i l a b l e i n c o m m e r c i a l / i n d u s t r i a l a n d m i l - s t d - 8 8 3 r e v . c , l e v e l b v e r s i o n s . t h e d a c 3 4 9 b i s s p e c i f i e d o v e r a t e m p e r a t u r e r a n g e o f ? 5 5 o c t o + 1 2 5 o c . b o t h v e r s i o n s o p e r a t e ? 5 5 o c t o + 1 2 5 o c . f u n c t i o n a l d i a g r a m g n d 1 2 g n d 1 1 + 1 5 v 1 0 ? 1 5 v 1 0 b i p o l a r o f f s e t 1 0 2 0 v r a n g e 4 1 0 v r a n g e 3 s u m m i n g j u n c t i o n 3 * f o r b c d ( - 3 d m o d e l s ) , r 1 + r 2 = 8 0 k g a i n a d j r e f o u t j u m p e r r e f i n 6 8 7 1 3 1 2 1 4 1 1 1 5 1 0 1 6 9 1 7 8 1 8 1 9 2 0 2 1 2 2 2 3 2 4 7 6 5 4 3 2 1 1 2 4 8 1 0 2 0 4 0 8 0 1 0 0 2 0 0 4 0 0 8 0 0 b i n a r y b i t b c d ( - 1 2 m o d e l s ) ( - 3 d m o d e l s ) ( m s b ) ( l s b ) - 1 0 v d c r e f p r e c i s i o n r e s i s t o r l a d d e r a n d s w i t c h e s r 1 5 0 k r 2 5 0 k 1 0 0 k ? + o u t p u t 1 1 6 5 c e d a r h i l l s t r e e t , m a r l b o r o u g h , m a 0 1 7 5 2 t e l : 5 0 8 . 4 8 5 . 6 3 5 0 f a x : 5 0 8 . 4 8 5 . 5 1 6 8 www.spectrummicrowave.com
0 . 1 6 5 ( 4 . 1 9 1 ) m a x 0 . 6 0 0 ( 1 5 . 2 4 ) 0 . 0 1 0 ( 0 . 2 5 4 ) 0 . 1 0 0 ( 0 . 2 5 ) 1 . 3 1 0 ( 3 3 . 2 7 4 ) m a x 0 . 0 2 5 ( 0 . 6 3 5 ) 0 . 2 0 5 ( 5 . 2 0 7 ) 0 . 8 0 0 ( 2 0 . 3 2 0 ) m a x 0 . 0 1 8 ( 0 . 4 5 1 ) p i n ( 1 ) i n d e x t o p v i e w i n c h ( m m ) t y p i c a l d i m e n s i o n s 2 4 1 1 3 1 2 p i n 1 i s m a r k e d b y t h e d o t o n t h e t o p o f t h e p a c k a g e c o n s u l t f a c t o r y f o r a p p l i c a t i o n i n f o r m a t i o n . s p e c i f i c a t i o n s ( t y p i c a l @ + 2 5 o c a n d n o m i n a l p o w e r s u p p l i e s u n l e s s o t h e r w i s e n o t e d ) s e r i e s d a c 3 4 9 t y p e f i x e d r e f e r e n c e , v o l t a g e o u t p u t d i g i t a l i n p u t r e s o l u t i o n 1 2 b i t s b i n a r y ( - 1 2 ) o r 3 d e c a d e s b c d ( - 3 d ) u n i p o l a r c o d i n g b i n a r y o r b c d b i p o l a r c o d i n g o f f s e t b i n a r y l o g i c l e v e l s b i n a r y v i h = 2 . 4 v m i n , v i l = 0 . 8 v m a x , b c d v i h = 3 . 5 v m i n , v i l = 1 . 5 v m a x , i n p u t c u r r e n t 1 a m a x a n a l o g o u t p u t v o l t a g e r a n g e 0 t o ? 5 v , 0 t o ? 1 0 2 . 5 v . 5 v , 1 0 v c u r r e n t c o m p l i a n c e 5 m a ( m i n ) i m p e d a n c e 0 . 1 s c a l e f a c t o r 1 0 . 1 % o f f . s . r . ( m a x ) u n i p o l a r o f f s e t 1 0 . 2 % o f f . s . r . ( m a x ) b i p o l a r o f f s e t 1 0 . 1 % o f f . s . r . ( m a x ) r e f e r e n c e i n t e r n a l 2 - 1 0 v d c e x t e r n a l ( d . c . o n l y ) - 1 0 v d c 1 0 % @ 1 m a s t a t i c p e r f o r m a n c e l i n e a r i t y 1 / 2 l s b ( m a x ) d i f f e r e n t i a l l i n e a r i t y 1 l s b ( m a x ) d y n a m i c p e r f o r m a n c e s e t t l i n g t i m e 1 5 s ( m a x ) s l e w r a t e 1 v / s s t a b i l i t y a c c u r a c y v s t e m p . 3 3 0 p p m / o c ( m a x ) l i n e a r i t y v s t e m p . 5 p p m / o c ( m a x ) d i f f e r e n t i a l l i n e a r i t y v s t e m p . 2 p p m / o c ( m a x ) p o w e r s u p p l y v o l t a g e @ c u r r e n t + 1 5 v @ 5 m a ( n o m ) : 1 0 m a ( m a x ) + 1 3 v t o + 1 8 v ; ? 1 5 v @ 1 5 m a ( n o m ) : 2 0 m a ( m a x ) ? 1 3 v t o ? 1 8 v ; r e j e c t i o n r a t i o 0 . 0 0 5 % / % p o w e r c o n s u m p t i o n 3 7 5 m w ( m a x ) t e m p e r a t u r e r a n g e s p e c i f i e d d a c 3 4 9 c ? 2 5 o c t o + 8 5 o c d a c 3 4 9 b ? 5 5 o c t o + 1 2 5 o c o p e r a t i n g , a l l m o d e l s ? 5 5 o c t o + 1 2 5 o c s t o r a g e , a l l m o d e l s ? 6 5 o c t o + 1 5 0 o c m e c h a n i c a l c a s e s t y l e c e r a m i c n o t e s : 1 . o f f s e t a n d g a i n a r e e x t e r n a l l y a d j u s t a b l e . s e e a p p l i c a t i o n s i n f o r m a t i o n . 2 . f o r s p e c i f i e d o v e r a l l p e r f o r m a n c e , e x t e r n a l l o a d i n g o f t h e r e f e r e n c e o u t p u t ( p i n 8 ) m u s t n o t e x c e e d 1 . 0 m a . 3 . t o t a l e f f e c t o f l i n e a r i t y , o f f s e t a n d g a i n t e m p c o ' s o n t h e t r a n s f e r c h a r a c t e r i s t i c s o f t h e u n i t . 4 . i n c a s e o f d i s c r e p a n c y b e t w e e n p a c k a g e s h o w n i n p h o t o g r a p h a n d p a c k a g e o u t l i n e d i m e n s i o n , t h e m e c h a n i c a l o u t l i n e i s c o r r e c t . s p e c i f i c a t i o n s s u b j e c t t o c h a n g e w i t h o u t n o t i c e . p i n f u n c t i o n p i n f u n c t i o n n o . n o . b i n a r y b c d 1 o u t p u t 2 4 b i t 1 ( m s b ) 8 0 0 2 s u m m i n g j c t 2 3 b i t 2 4 0 0 3 1 0 v r a n g e 2 2 b i t 3 2 0 0 4 2 0 v o l t r a n g e 2 1 b i t 4 1 0 0 5 b i p o l a r o f f s e t 2 0 b i t 5 8 0 6 g a i n a d j 1 9 b i t 6 4 0 7 r e f i n 1 8 b i t 7 2 0 8 r e f o u t 1 7 b i t 8 1 0 9 ? 1 5 1 6 b i t 9 8 1 0 + 1 5 v 1 5 b i t 1 0 4 1 1 g n d 1 4 b i t 1 1 2 1 2 g n d 1 3 b i t 1 ( l s b ) 1 o r d e r i n g i n f o r m a t i o n m o d e l d e s c r i p t i o n d a c 3 4 9 c - 1 2 c o m m . 1 2 - b i t , ? 2 5 o c t o + 8 5 o c d a c 3 4 9 c - 3 d c o m m , 3 - d e c a d e , ? 2 5 o c t o + 8 5 o c d a c 3 4 9 b - 1 2 m l l , 1 2 - b i t , ? 5 5 o c t o + 1 2 5 o c d a c 3 4 9 b - 3 d m i l , 3 - d e c a d e , ? 5 5 o c t o + 1 2 5 o c c a u t i o n : e s d ( e l e c t r o - s t a t i c d i s c h a r g e ) s e n s i t i v e d e v i c e . p e r m a n e n t d a m a g e m a y o c c u r w h e n u n c o n n e c t e d d e v i c e s a r e s u b j e c t e d t o h i g h e n e r g y e l e c t r o s t a t i c f i e l d s . u n l e s s o t h e r w i s e n o t e d , t h e v o l t a g e a t a n y d i g i t a l i n p u t s h o u l d n e v e r e x c e e d t h e s u p p l y v o l t a g e b y m o r e t h a n 0 . 5 v o l t s o r g o b e l o w ? 0 . 5 v o l t s . dac349


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