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INA209
1
F E A T U R E S D E S C R I P T I O N
A P P L I C A T I O N S
Critical
DAC+
Critical
DAC -
CMP
Filter
Watchdog
PowerRegister
CurrentRegister I C
Interface
2
VoltageRegister
ConvertGND GPIO
VIN+ VIN-
VS(SupplyVoltage)
Critical
Overlimit
Warning
Alert
Data
CLK
CMP
ADC
INA209
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
H i g h - S i d e M e a s u r e m e n t , B i - D i r e c t i o n a l C u r r e n t / P o w e r M o n i t o r
w i t h I 2C I n t e r f a c e
2 3 S E N S E S B U S V O L T A G E S F R O M 0 V T O + 2 6 V T h e I N A 2 0 9 i s a h i g h - s i d e c u r r e n t s h u n t a n d p o w e rm o n i t o r w i t h a n I 2C i n t e r f a c e . T h e I N A 2 0 9 m o n i t o r s R E P O R T S C U R R E N T , V O L T A G E , A N D b o t h s h u n t d r o p a n d s h u n t b u s v o l t a g e . A P O W E R ; S T O R E S P E A K S p r o g r a m m a b l e c a l i b r a t i o n v a l u e , c o m b i n e d w i t h a n
T R I P L E W A T C H D O G L I M I T S : i n t e r n a l m u l t i p l i e r , e n a b l e s d i r e c t r e a d o u t s i n
L o w e r W a r n i n g w i t h D e l a y a m p e r e s . A n a d d i t i o n a l m u l t i p l y i n g r e g i s t e r c a l c u l a t e s p o w e r i n w a t t s . T h e I N A 2 0 9 f e a t u r e s t w o s e p a r a t e , U p p e r O v e r - l i m i t , N o D e l a yo n b o a r d w a t c h d o g c a p a b i l i t i e s : a w a r n i n g c o m p a r a t o r F a s t A n a l o g C r i t i c a la n d a n o v e r - l i m i t c o m p a r a t o r . T h e w a r n i n g
H I G H A C C U R A C Y : 1 % M A X O V E R T E M P c o m p a r a t o r i s u s e f u l f o r m o n i t o r i n g l o w e r w a r n i n g l i m i t s a n d i n c o r p o r a t e s a u s e r - d e f i n e d d e l a y . T h e o v e r - l i m i t c o m p a r a t o r a s s i s t s w i t h m o n i t o r i n g u p p e r l i m i t s t h a t c o u l d r e q u i r e i m m e d i a t e s y s t e m s h u t d o w n .
S E R V E R S T E L E C O M E Q U I P M E N T T h e I N A 2 0 9 a l s o i n c l u d e s a n a n a l o g c o m p a r a t o r a n d A U T O M O T I V E a p r o g r a m m a b l e d i g i t a l - t o - a n a l o g c o n v e r t e r ( D A C )
t h a t c o m b i n e t o p r o v i d e t h e f a s t e s t p o s s i b l e P O W E R M A N A G E M E N T r e s p o n s e s t o c u r r e n t o v e r l o a d c o n d i t i o n s .
B A T T E R Y C H A R G E R S
T h e I N A 2 0 9 c a n b e u s e d t o g e t h e r w i t h h o t s w a p W E L D I N G E Q U I P M E N T c o n t r o l l e r s t h a t a l r e a d y u s e a c u r r e n t s e n s e r e s i s t o r . P O W E R S U P P L I E S
T h e I N A 2 0 9 f u l l - s c a l e r a n g e c a n b e s e l e c t e d t o b e T E S T E Q U I P M E N T
e i t h e r w i t h i n t h e h o t - s w a p c o n t r o l l e r s e n s e l i m i t s , o r w i d e e n o u g h t o i n c l u d e t h e m .
T h e I N A 2 0 9 s e n s e s a c r o s s s h u n t s o n b u s e s t h a t c a nv a r y f r o m 0 V t o 2 6 V . T h e d e v i c e u s e s a s i n g l e + 3 V t o + 5 . 5 V s u p p l y , d r a w i n g a m a x i m u m o f 1 . 5 m A o f
s u p p l y c u r r e n t . I t i s s p e c i f i e d f o r o p e r a t i o n f r o m 2 5 C t o + 8 5 C .
1
P l e a s e b e a w a r e t h a t a n i m p o r t a n t n o t i c e c o n c e r n i n g a v a i l a b i l i t y , s t a n d a r d w a r r a n t y , a n d u s e i n c r i t i c a l a p p l i c a t i o n s o f T e x a s I n s t r u m e n t s s e m i c o n d u c t o r p r o d u c t s a n d d i s c l a i m e r s t h e r e t o a p p e a r s a t t h e e n d o f t h i s d a t a s h e e t .
2 I 2 C i s a t r a d e m a r k o f N X P S e m i c o n d u c t o r s . 3 A l l o t h e r t r a d e m a r k s a r e t h e p r o p e r t y o f t h e i r r e s p e c t i v e o w n e r s .
P R O D U C T I O N D A T A i n f o r m a t i o n i s c u r r e n t a s o f p u b l i c a t i o n d a t e . C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d P r o d u c t s c o n f o r m t o s p e c i f i c a t i o n s p e r t h e t e r m s o f t h e T e x a s I n s t r u m e n t s s t a n d a r d w a r r a n t y . P r o d u c t i o n p r o c e s s i n g d o e s n o t
n e c e s s a r i l y i n c l u d e t e s t i n g o f a l l p a r a m e t e r s .
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A B S O L U T E M A X I M U M R A T I N G S( 1 )
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
T h i s i n t e g r a t e d c i r c u i t c a n b e d a m a g e d b y E S D . T e x a s I n s t r u m e n t s r e c o m m e n d s t h a t a l l i n t e g r a t e d c i r c u i t s b e h a n d l e d w i t ha p p r o p r i a t e p r e c a u t i o n s . F a i l u r e t o o b s e r v e p r o p e r h a n d l i n g a n d i n s t a l l a t i o n p r o c e d u r e s c a n c a u s e d a m a g e .
E S D d a m a g e c a n r a n g e f r o m s u b t l e p e r f o r m a n c e d e g r a d a t i o n t o c o m p l e t e d e v i c e f a i l u r e . P r e c i s i o n i n t e g r a t e d c i r c u i t s m a y b e m o r e s u s c e p t i b l e t o d a m a g e b e c a u s e v e r y s m a l l p a r a m e t r i c c h a n g e s c o u l d c a u s e t h e d e v i c e n o t t o m e e t i t s p u b l i s h e d s p e c i f i c a t i o n s .
O R D E R I N G I N F O R M A T I O N ( 1 )
P R O D U C T P A C K A G E - L E A D P A C K A G E D E S I G N A T O R P A C K A G E M A R K I N G I N A 2 0 9 T S S O P - 1 6 P W I N A 2 0 9 A
( 1 ) F o r t h e m o s t c u r r e n t p a c k a g e a n d o r d e r i n g i n f o r m a t i o n s e e t h e P a c k a g e O p t i o n A d d e n d u m a t t h e e n d o f t h i s d o c u m e n t , o r s e e t h e T I w e b s i t e a t w w w . t i . c o m .
O v e r o p e r a t i n g f r e e - a i r t e m p e r a t u r e r a n g e ( u n l e s s o t h e r w i s e n o t e d ) .
I N A 2 0 9 U N I T
S u p p l y V o l t a g e , V S 6 V
D i f f e r e n t i a l ( V I N +) ( V I N )( 2 ) 2 6 t o + 2 6 V A n a l o g I n p u t s ,
VI N +, VI N C o m m o n - M o d e 0 . 3 t o + 2 6 V
O p e n - D r a i n D i g i t a l O u t p u t s G N D 0 . 3 t o + 6 V G P I O , C o n v e r t P i n s G N D 0 . 3 t o V S + 0 . 3 V
I n p u t C u r r e n t I n t o A n y P i n 5 m A
O p e n - D r a i n D i g i t a l O u t p u t C u r r e n t 1 0 m A
O p e r a t i n g T e m p e r a t u r e 4 0 t o + 1 2 5 C
S t o r a g e T e m p e r a t u r e 6 5 t o + 1 5 0 C
J u n c t i o n T e m p e r a t u r e + 1 5 0 C
H u m a n B o d y M o d e l 2 0 0 0 V
E S D R a t i n g s C h a r g e d - D e v i c e M o d e l 1 0 0 0 V
M a c h i n e M o d e l ( M M ) 1 5 0 V
( 1 ) S t r e s s e s a b o v e t h e s e r a t i n g s m a y c a u s e p e r m a n e n t d a m a g e . E x p o s u r e t o a b s o l u t e m a x i m u m c o n d i t i o n s f o r e x t e n d e d p e r i o d s m a y d e g r a d e d e v i c e r e l i a b i l i t y . T h e s e a r e s t r e s s r a t i n g s o n l y , a n d f u n c t i o n a l o p e r a t i o n o f t h e d e v i c e a t t h e s e o r a n y o t h e r c o n d i t i o n s b e y o n d
t h o s e s p e c i f i e d i s n o t i m p l i e d . ( 2 ) V I N + a n d V I N m a y h a v e a d i f f e r e n t i a l v o l t a g e o f 2 6 V t o + 2 6 V ; h o w e v e r , t h e v o l t a g e a t t h e s e p i n s m u s t n o t e x c e e d t h e r a n g e 0 . 3 V t o
+ 2 6 V .
2 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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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 S = + 3 . 3 V
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
B o l d f a c e l i m i t s a p p l y o v e r t h e s p e c i f i e d t e m p e r a t u r e r a n g e , TA = 2 5 C t o + 8 5 C . A t TA = + 2 5 C , V I N + = 1 2 V , V S E N S E = ( VI N + VI N ) = 3 2 m V , P G A = 1 , a n d B R N G
( 1 ) = 1 , u n l e s s o t h e r w i s e n o t e d .
I N A 2 0 9
P A R A M E T E R T E ST C O N D I T I O N S M I N T Y P M A X U N I T
I N P U T
F u l l - S c a l e C u r r e n t S e n s e ( I n p u t ) V o l t a g e R a n g e P G A = 1 0 4 0 m V
P G A = 2 0 8 0 m V
P G A = 4 0 1 6 0 m V
P G A = 8 0 3 2 0 m V
B u s V o l t a g e ( I n p u t V o l t a g e ) R a n g e ( 2 ) B R N G = 1 0 3 2 V
B R N G = 0 0 1 6 V
C o m m o n - M o d e R e j e c t i o n C M R R V I N + = 0 V t o 2 6 V 1 0 0 1 2 0 d B
O f f s e t V o l t a g e , R T I ( 3 ) VO S P G A = 1 1 0 1 0 0 V
P G A = 2 2 0 1 2 5 V
P G A = 4 3 0 1 5 0 V
P G A = 8 4 0 2 0 0 V
v s T e m p e r a t u r e 0 . 1 V / C
v s P o w e r S u p p l y P S R R V S = 3 V t o 5 . 5 V 1 0 V / VC u r r e n t S e n s e G a i n E r r o r 4 0 m %
v s T e m p e r a t u r e 1 0 p p m / C
I n p u t I m p e d a n c e A c t i v e M o d e
VI N + P i n 2 0 A
VI N P i n 2 0 | | 3 2 0 A | | k
I n p u t L e a k a g e P o w e r - D o w n M o d e
VI N + P i n 0 . 1 0 . 5 A
VI N P i n 0 . 1 0 . 5 A
D C A C C U R A C Y
A D C B a s i c R e s o l u t i o n 1 2 B i t s
1 L S B S t e p S i z e
S h u n t V o l t a g e 1 0 V
B u s V o l t a g e 4 m V
C u r r e n t M e a s u r e m e n t E r r o r 0 . 2 0 . 5 %
o v e r T e m p e r a t u r e 1 %
B u s V o l t a g e M e a s u r e m e n t E r r o r 0 . 2 0 . 5 %
o v e r T e m p e r a t u r e 1 %
D i f f e r e n t i a l N o n l i n e a r i t y 0 . 1 L S B
C r i t i c a l D A C F u l l - S c a l e R a n g e 2 5 5 m V
C r i t i c a l D A C A c c u r a c y 0 . 5 1 %
C r i t i c a l D A C R e s o l u t i o n 8 B i t s
C r i t i c a l D A C 1 L S B S t e p S i z e 1 m V
C r i t i c a l D A C C o m p a r a t o r O f f s e t 0 . 3 1 . 6 m V
C r i t i c a l D A C C o m p a r a t o r H y s t e r e s i s ( 4 ) S e e ( 4 )
C r i t i c a l D A C C o m p a r a t o r D e l a y 5 s
( 1 ) B R N G i s b i t 1 3 o f t h e C o n f i g u r a t i o n R e g i s t e r . ( 2 ) T h i s p a r a m e t e r o n l y e x p r e s s e s t h e f u l l - s c a l e r a n g e o f t h e A D C s c a l i n g . I n n o e v e n t s h o u l d m o r e t h a n 2 6 V b e a p p l i e d t o t h i s d e v i c e . ( 3 ) R e f e r r e d - t o - i n p u t ( R T I ) . ( 4 ) U s e r - p r o g r a m m a b l e . S e e t h e C r i t i c a l C o m p a r a t o r a n d R e g i s t e r s e c t i o n s .
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 3
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
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 S = + 3 . 3 V ( c o n t i n u e d )
B o l d f a c e l i m i t s a p p l y o v e r t h e s p e c i f i e d t e m p e r a t u r e r a n g e , TA = 2 5 C t o + 8 5 C . A t TA = + 2 5 C , V I N + = 1 2 V , V S E N S E = ( VI N + VI N ) = 3 2 m V , P G A = 1 , a n d B R N G = 1 , u n l e s s o t h e r w i s e n o t e d .
I N A 2 0 9
P A R A M E T E R T E S T C O N D I T I O N S M I N T Y P M A X U N I T
A D C T I M I N G
A D C C o n v e r s i o n T i m e 1 2 - B i t 5 3 2 5 8 6 s
1 1 - B i t 2 7 6 3 0 4 s
1 0 - B i t 1 4 8 1 6 3 s
9 - B i t 8 4 9 3 s
M in i m u m C o n v e r t I n p u t L o w T i m e 4 s
S M B u s
S M B u s T i m e o u t ( 5 ) 2 8 3 5 m s
D I G I T A L I N P U T S ( C o n v e r t , G P I O a n d S D A a s I n p u t , S C L , A 0 , A 1 )
I n p u t C a p a c i t a n c e 3 p F
L e a k a g e I n p u t C u r r e n t 0 VI N VS 0 . 1 1 A
I n p u t L o g i c L e v e l s :
VI H 0 . 7 ( V S ) 6 V
VI L 0 . 3 0 . 3 ( V S ) V
H y s t e r e s i s 5 0 0 m V
D I G I T A L O U T P U T S
G P I O P i n O u t p u t L o w I S I N K = 3 m A 0 . 1 5 0 . 4 V
G P I O P i n O u t p u t H i g h I S O U R C E = 3 m A V S 0 . 4 V S 0 . 1 5 V
O P E N - D R A I N D I G I T A L O U T P U T S ( C r i t i c a l , O v e r - L i m i t , W a r n i n g , A l e r t , S D A )
L o g i c ' 0 ' O u t p u t L e v e l I S I N K = 3 m A 0 . 1 5 0 . 4 V
H i g h - L e v e l O u t p u t L e a k a g e C u r r e n t V O U T = VS 0 . 1 1 A
P O W E R S U P P L Y
O p e r a t i n g S u p p l y R a n g e + 3 + 5 . 5 V
Q u i e s c e n t C u r r e n t 1 1 . 5 m A
Q u i e s c e n t C u r r e n t , P o w e r - D o w n M o d e 6 1 5 A
P o w e r - O n R e s e t T h r e s h o l d 2 V
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 T e m p e r a t u r e R a n g e 2 5 + 8 5 C
O p e r a t i n g T e m p e r a t u r e R a n g e 4 0 + 1 2 5 C
T h e r m a l R e s i s t a n c e J A
T S S O P - 1 6 + 1 5 0 C / W
( 5 ) S M B u s t i m e o u t i n t h e I N A 2 0 9 r e s e t s t h e i n t e r f a c e a n y t i m e S C L o r S D A i s l o w f o r o v e r 2 8 m s .
4 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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P I N C O N F I G U R A T I O N
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
SMBusAlert
A1
A0
SDA
SCL
GND
VS+
Warning
VIN+
VIN-
Convert
GND
VS+
GPIO
Critical
Overlimit
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
I N A 2 0 9 T o p V i e w
P I N D E S C R I P T I O N S
P I N N O . N A M E D E S C R I P T I O N
1 VI N + P o s i t i v e d i f f e r e n t i a l s h u n t v o l t a g e . C o n n e c t t o p o s i t i v e s i d e o f s h u n t r e s i s t o r .
2 VI N N e g a t i v e d i f f e r e n t i a l s h u n t v o l t a g e . C o n n e c t t o n e g a t i v e s i d e o f s h u n t r e s i s t o r . B u s v o l t a g e i s m e a s u r e d f r o m t h i s p i n t o g r o u n d .
3 C o n v e r t U s e d t o t r i g g e r c o n v e r s i o n s i n t r i g g e r e d m o d e . I n t r i g g e r e d m o d e , t h i s p i n s h o u l d n o r m a l l y b e h i g h a n d t a k e n l o w t o i n i t i a t e c o n v e r s i o n . I t m a y b e r e t u r n e d h i g h a f t e r 4 s . I f h e l d l o w , t h e A D C c o n v e r t s e a c h t i m e a t r i g g e r e d m o d e c o m m a n d i s w r i t t e n v i a t h e I 2C b u s . I f n o t u s e d , t h i s l i n e s h o u l d b e t i e d h i g h .
4 G N D C o n n e c t t o g e t h e r w i t h p i n 1 1 t o g r o u n d .
5 VS + C o n n e c t t o g e t h e r w i t h p i n 1 0 t o s u p p l y , 3 V t o 5 . 5 V .
6 G P I O G e n e r a l - p u r p o s e , u s e r - p r o g r a m m a b l e i n p u t / o u t p u t . T o t e m - p o l e o u t p u t . C o n n e c t t o g r o u n d o r s u p p l y i f n o t u s e d . D e f a u l t s t a t e i s a s a n i n p u t .
7 C r i t i c a l O p e n - d r a i n c r i t i c a l w a t c h d o g o u t p u t ( f i l t e r s e t i n C r i t i c a l D A C R e g i s t e r ) . D e f a u l t s t a t e i s d i s a b l e d ; a c t i v e - l o w ; t r a n s p a r e n t ( n o n - l a t c h e d ) .
8 O v e r l i m i t O p e n - d r a i n o v e r - l i m i t w a t c h d o g o u t p u t . D e f a u l t s t a t e i s d i s a b l e d ; a c t i v e - l o w ; t r a n s p a r e n t ( n o n - l a t c h e d ) .
9 W a r n i n g O p e n - d r a i n w a r n i n g w a t c h d o g o u t p u t ( d e l a y s e t i n C r i t i c a l D A C R e g i s t e r ) . D e f a u l t s t a t e i s d i s a b l e d ; a c t i v e - l o w ; t r a n s p a r e n t ( n o n - l a t c h e d ) .
1 0 VS + C o n n e c t t o g e t h e r w i t h p i n 5 t o s u p p l y , 3 V t o 5 . 5 V .
1 1 G N D C o n n e c t t o g e t h e r w i t h p i n 4 t o g r o u n d .
1 2 S C L S e r i a l b u s c l o c k l i n e .
1 3 S D A S e r i a l b u s d a t a l i n e .
1 4 A 0 A d d r e s s p i n . T a b l e 1 s h o w s p i n s e t t i n g s a n d c o r r e s p o n d i n g a d d r e s s e s .
1 5 A 1 A d d r e s s p i n . T a b l e 1 s h o w s p i n s e t t i n g s a n d c o r r e s p o n d i n g a d d r e s s e s .
1 6 S M B u s A l e r t O p e n - d r a i n S M B u s a l e r t o u t p u t . C o n t r o l l e d i n S M B u s A l e r t M a s k R e g i s t e r . D e f a u l t s t a t e i s d i s a b l e d .
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 5
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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T Y P I C A L C H A R A C T E R I S T I C S
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-10010 100 1k 10k 100k 1M
Ga
in(dB)
InputFrequency(Hz)
100
80
60
40
20
0
-20
-40
-60
-80
-100-40 -25 0 25 50 75 100
Off
se
t(V)
m
Temperature( C)
125
160mVRange
320mVRange
80mVRange 40mVRange
100
80
60
40
20
0
-20
-40
-60
-80
-100-40 -25 0 25 50 75 100
GainError(m%)
Temperature( C)
125
320mVRange 160mVRange
80mVRange 40mVRange
50
45
40
35
30
25
20
15
10
5
0-40 -25 0 25 50 75 100
Offse
t(mV)
Temperature( C)
125
32VRange 16VRange
20
15
10
5
0
-5
-10
-15
-20
-0.4 -0.3 -0.2 -0.1 0 0.1 0.2 0.3
INL(
V)
m
InputVoltage(V)
0.4
100
80
60
40
20
0
-20
-40
-60
-80
-100-40 -25 0 25 50 75 100
GainError(m%)
Temperature( C)
125
32VRange
16VRange
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
A t TA = + 2 5 C , V I N + = 1 2 V , V S E N S E = ( VI N + VI N ) = 3 2 m V , P G A = 1 , a n d B R N G = 1 , u n l e s s o t h e r w i s e n o t e d .
F R E Q U E N C Y R E S P O N S E A D C S H U N T O F F S E T v s T E M P E R A T U R E
F i g u r e 1 . F i g u r e 2 .
A D C S H U N T G A I N E R R O R v s T E M P E R A T U R E A D C B U S V O L T A G E O F F S E T v s T E M P E R A T U R E
F i g u r e 3 . F i g u r e 4 .
A D C B U S G A I N E R R O R v s T E M P E R A T U R E I N T E G R A L N O N L I N E A R I T Y v s I N P U T V O L T A G E
F i g u r e 5 . F i g u r e 6 .
6 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0-40 -25 0 25 50 75 100
Offse
t(mV)
Temperature( C)
125
CriticalComparator -
CriticalComparator+
1.0
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0-40 -25 0 25 50 75 100
Fu
ll-S
ca
leError
(mV)
Temperature( C)
125
CriticalComparator -
CriticalComparator+
2.0
1.5
1.0
0.5
0
-0.5
-1.0
-1.5
0 5 10 15 20 25
Inpu
tCurren
ts(mA)
V Voltage(V)IN-
30
VS+ =5V
V 5VS+ =
VS+ =3V
V 3VS+ =
1.2
1.0
0.8
0.6
0.4
0.2
0
-40 -25 0 25 50 75 100
I
(mA)
Q
Temperature( C)
125
V =5 VS
V =3 VS
16
14
12
10
8
6
4
2
0
-40 -25 0 25 125
I
(A)
m
Q
Temperature( C)
V =5VS
V =3VS
50 75 100
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
1k 10k 100k 1M 10M
I Q(mA)
SCLFrequency(Hz)
V =5VS
V =S 3V
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
T Y P I C A L C H A R A C T E R I S T I C S ( c o n t i n u e d )
A t TA = + 2 5 C , V I N + = 1 2 V , V S E N S E = ( VI N + VI N ) = 3 2 m V , P G A = 1 , a n d B R N G = 1 , u n l e s s o t h e r w i s e n o t e d .
C R I T I C A L C O M P A R A T O R F U L L - S C A L E E R R O R v s C R I T I C A L C O M P A R A T O R O F F S E T v s T E M P E R A T U R E T E M P E R A T U R E
F i g u r e 7 . F i g u r e 8 .
I N P U T C U R R E N T S W I T H L A R G E D I F F E R E N T I A L V O L T A G E S
( VI N + a t 1 2 V , S w e e p o f V I N ) A C T I V E I Q v s T E M P E R A T U R E
F i g u r e 9 . F i g u r e 1 0 .
S H U T D O W N I Q v s T E M P E R A T U R E A C T I V E I Q v s I2C C L O C K F R E Q U E N C Y
F i g u r e 1 1 . F i g u r e 1 2 .
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 7
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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400
350
300
250
200
150
100
50
01k 10k 100k 1M 10M
I
(A)
Q
m
SCLFrequency(Hz)
V =5VS
V =3VS
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
T Y P I C A L C H A R A C T E R I S T I C S ( c o n t i n u e d )
A t TA = + 2 5 C , V I N + = 1 2 V , V S E N S E = ( VI N + VI N ) = 3 2 m V , P G A = 1 , a n d B R N G = 1 , u n l e s s o t h e r w i s e n o t e d .
S H U T D O W N I Q v s I2C C L O C K F R E Q U E N C Y
F i g u r e 1 3 .
8 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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F U N C T I O N A L B L O C K D I A G R A M
ADC
DAC
Shun
tVo
ltage
Channe
l
Bus
Vo
ltage
Channe
l
PGA
(In
Con
figura
tion
Reg
ister)
Shun
tVo
ltage
(1)
Da
taReg
isters
Fu
ll-Sca
leCa
libra
tion
(2)
Curren
t(1)
Bus
Vo
ltage
(1)
Power(
1)
Shun
tVo
ltage
Pea
k
-
(2)
Shun
tVo
ltage+
Pea
k(2)
Pea
k-H
oldReg
isters
Bus
Vo
ltage
Minimum
Pea
k(2)
Bus
Vo
ltage
Max
imum
Pea
k(2)
Power
Pea
k(2)
CMP
CMP
CMP
CMP
CMP
CMP
CMP
CMP
CMP
CMP
Shun
tVo
ltage
Warn
ing
-
(2)
Shun
tVo
ltage+
Warn
ing
(2)
Bus
Vo
ltage
Un
der-
Vo
ltage
Warn
ing
(2)
Programma
bleDe
lay
(se
tin
Cri
tica
lDAC
Reg
ister)
-
La
tchan
d
Po
lari
ty
Bus
Vo
ltage
Over-
Vo
ltage
Warn
ing
(2)
Power
Warn
ing
(2)
Bus
Un
der-
Vo
ltage
Over-
limit
(2)
Bus
Over-
Vo
ltage
Over-
limit
(2)
Power
Over-
limit
(2)
Ena
ble/D
isa
ble
inSMBus
/Ena
ble
Regis
ter
Wa
rning
(Open-D
rain)
La
tchan
d
Po
lari
ty
Ena
ble/Disa
ble
inSMBus
/Enab
le
Reg
ister
Over-
limit
(Open-D
rain)
WarningOutputDefault:
Disa
bled
Ac
tive
Low
Transparen
t(no
tlatche
d)
Programma
bleDe
lay
(se
tin
Cri
tica
lDAC
Reg
ister)
-
La
tchan
d
Po
lari
ty
Ena
ble/Disa
ble
inSMBus
/Ena
ble
Reg
ister
Cri
tica
l
(Open-D
rain)
CriticalOutputDefault:
Disa
bled
Ac
tive
Low
Transparen
t(no
tlatche
d)
Warn
ing
Reg
istersan
dOu
tpu
t
OverlimitOutputDefault:
Disa
bled
Ac
tive
Low
Transparen
t(no
tlatche
d)
Overl
imitReg
istersan
dOu
tpu
t
Critica
lDAC+
(2)
DAC
Critica
lDAC
-(2)
Cri
ticalD
ACHys
teres
is
NOTES:
Das
he
dline
indic
ates
the
flag
isinthe
Status
Reg
ister.
(1)Rea
d-o
nly
.
(2)Rea
d/Wri
te.
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
F i g u r e 1 4 .
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 9
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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A P P L I C A T I O N I N F O R M A T I O N
B U S O V E R V I E W
CBYPASS0.1 Fm
Supply Load
Current
Shunt
Supply Voltage
(INA209PowerSupplyRangeis3Vto5.5V)
3.3VSupply
CriticalOutput
OverlimitOutput
WarningOutput
Data(SDA)
Alert
Clock(SCL)
Critical
DAC+
Critical
DAC -
CMP
CMP
Filter
Watchdog
PowerRegister
CurrentRegisterI C2
Interface
VoltageRegister
Convert
ADC
GND GPIO
INA209VIN+ VIN- VS
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
T h e I N A 2 0 9 i s a d i g i t a l c u r r e n t - s h u n t m o n i t o r w i t h a n T o a d d r e s s a s p e c i f i c d e v i c e , t h e m a s t e r i n i t i a t e s aI 2C a n d S M B u s - c o m p a t i b l e i n t e r f a c e . I t p r o v i d e s S T A R T c o n d i t i o n b y p u l l i n g t h e d a t a s i g n a l l i n e ( S D A ) d i g i t a l c u r r e n t , v o l t a g e , a n d p o w e r r e a d i n g s f r o m a H I G H t o a L O W l o g i c l e v e l w h i l e S C L i s H I G H . n e c e s s a r y f o r a c c u r a t e d e c i s i o n - m a k i n g i n A l l s l a v e s o n t h e b u s s h i f t i n t h e s l a v e a d d r e s s b y t e p r e c i s e l y - c o n t r o l l e d s y s t e m s . P r o g r a m m a b l e r e g i s t e r s o n t h e r i s i n g e d g e o f S C L , w i t h t h e l a s t b i t i n d i c a t i n g
a l l o w f l e x i b l e c o n f i g u r a t i o n f o r s e t t i n g w a r n i n g l i m i t s , w h e t h e r a r e a d o r w r i t e o p e r a t i o n i s i n t e n d e d . D u r i n g m e a s u r e m e n t r e s o l u t i o n , a n d c o n t i n u o u s - t h e n i n t h c l o c k p u l s e , t h e s l a v e b e i n g a d d r e s s e d v e r s u s - t r i g g e r e d o p e r a t i o n . D e t a i l e d r e g i s t e r r e s p o n d s t o t h e m a s t e r b y g e n e r a t i n g a n i n f o r m a t i o n a p p e a r s a t t h e e n d o f t h i s d a t a s h e e t , A c k n o w l e d g e a n d p u l l i n g S D A L O W . b e g i n n i n g w i t h T a b l e 2 . S e e t h e F u n c t i o n a l B l o c k
D a t a t r a n s f e r i s t h e n i n i t i a t e d a n d e i g h t b i t s o f d a t a D i a g r a m f o r a b l o c k d i a g r a m o f t h e I N A 2 0 9 .
a r e s e n t , f o l l o w e d b y a n A c k n o w l e d g e b i t . D u r i n g T h e I N A 2 0 9 o f f e r s c o m p a t a b i l i t y w i t h I 2C a n d S M B u s d a t a t r a n s f e r , S D A m u s t r e m a i n s t a b l e w h i l e S C L i s i n t e r f a c e s . T h e I 2C a n d S M B u s p r o t o c o l s a r e H I G H . A n y c h a n g e i n S D A w h i l e S C L i s H I G H i s e s s e n t i a l l y c o m p a t i b l e w i t h e a c h o t h e r . I 2C w i l l b e i n t e r p r e t e d a s a S T A R T o r S T O P c o n d i t i o n . u s e d t h r o u g h o u t t h i s d o c u m e n t , w i t h S M B u s b e i n g
O n c e a l l d a t a h a v e b e e n t r a n s f e r r e d , t h e m a s t e r s p e c i f i e d o n l y w h e n a d i f f e r e n c e b e t w e e n t h e t w o
g e n e r a t e s a S T O P c o n d i t i o n , i n d i c a t e d b y p u l l i n g s y s t e m s i s b e i n g a d d r e s s e d . T w o b i - d i r e c t i o n a l l i n e s ,
S D A f r o m L O W t o H I G H w h i l e S C L i s H I G H . T h e S C L a n d S D A , c o n n e c t t h e I N A 2 0 9 t o t h e b u s . B o t h
I N A 2 0 9 i n c l u d e s a 2 8 m s t i m e o u t o n i t s i n t e r f a c e t o
S C L a n d S D A a r e o p e n - d r a i n c o n n e c t i o n s . F i g u r e 1 5 p r e v e n t l o c k i n g u p a n S M B u s . s h o w s a 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 d e v i c e t h a t i n i t i a t e s t h e t r a n s f e r i s c a l l e d am a s t e r , a n d t h e d e v i c e s c o n t r o l l e d b y t h e m a s t e r a r e s l a v e s . T h e b u s m u s t b e c o n t r o l l e d b y a m a s t e r d e v i c e t h a t g e n e r a t e s t h e s e r i a l c l o c k ( S C L ) , c o n t r o l s t h e b u s a c c e s s , a n d g e n e r a t e s S T A R T a n d S T O P c o n d i t i o n s .
F i g u r e 1 5 . 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
1 0 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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S e r i a l B u s A d d r e s s W R I T I N G T O / R E A D I N G F R O M T H E I N A 2 0 9
S e r i a l I n t e r f a c e
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
T o c o m m u n i c a t e w i t h t h e I N A 2 0 9 , t h e m a s t e r m u s t A c c e s s i n g a p a r t i c u l a r r e g i s t e r o n t h e I N A 2 0 9 i sf i r s t a d d r e s s s l a v e d e v i c e s v i a a s l a v e a d d r e s s b y t e . a c c o m p l i s h e d b y w r i t i n g t h e a p p r o p r i a t e v a l u e t o t h e
T h e s l a v e a d d r e s s b y t e c o n s i s t s o f s e v e n a d d r e s s r e g i s t e r p o i n t e r . R e f e r t o T a b l e 2 f o r a c o m p l e t e l i s t o f b i t s , a n d a d i r e c t i o n b i t i n d i c a t i n g t h e i n t e n t o f r e g i s t e r s a n d c o r r e s p o n d i n g a d d r e s s e s . T h e v a l u e f o r e x e c u t i n g a r e a d o r w r i t e o p e r a t i o n . t h e r e g i s t e r p o i n t e r a s s h o w n i n F i g u r e 1 9 i s t h e f i r s t
b y t e t r a n s f e r r e d a f t e r t h e s l a v e a d d r e s s b y t e w i t h t h e T h e I N A 2 0 9 h a s t w o a d d r e s s p i n s , A 0 a n d A 1 .R / W b i t L O W . E v e r y w r i t e o p e r a t i o n t o t h e I N A 2 0 9
T a b l e 1 d e s c r i b e s t h e p i n l o g i c l e v e l s f o r e a c h o f t h e r e q u i r e s a v a l u e f o r t h e r e g i s t e r p o i n t e r . 1 6 p o s s i b l e a d d r e s s e s . T h e s t a t e o f p i n s A 0 a n d A 1 i s s a m p l e d o n e v e r y b u s c o m m u n i c a t i o n a n d s h o u l d W r i t i n g t o a r e g i s t e r b e g i n s w i t h t h e f i r s t b y t e b e s e t b e f o r e a n y a c t i v i t y o n t h e i n t e r f a c e o c c u r s . T h e t r a n s m i t t e d b y t h e m a s t e r . T h i s b y t e i s t h e s l a v e a d d r e s s p i n s a r e r e a d a t t h e s t a r t o f e a c h a d d r e s s , w i t h t h e R / W b i t L O W . T h e I N A 2 0 9 t h e n c o m m u n i c a t i o n e v e n t . a c k n o w l e d g e s r e c e i p t o f a v a l i d a d d r e s s . T h e n e x t
b y t e t r a n s m i t t e d b y t h e m a s t e r i s t h e a d d r e s s o f t h e T a b l e 1 . I N A 2 0 9 A d d r e s s P i n s a n d r e g i s t e r t o w h i c h d a t a w i l l b e w r i t t e n . T h i s r e g i s t e r
S l a v e A d d r e s s e s a d d r e s s v a l u e u p d a t e s t h e r e g i s t e r p o i n t e r t o t h e d e s i r e d r e g i s t e r . T h e n e x t t w o b y t e s a r e w r i t t e n t o t h e A 1 A 0 S L A V E A D D R E S Sr e g i s t e r a d d r e s s e d b y t h e r e g i s t e r p o i n t e r . T h e
G N D G N D 1 0 0 0 0 0 0 I N A 2 0 9 a c k n o w l e d g e s r e c e i p t o f e a c h d a t a b y t e . T h e
G N D V S + 1 0 0 0 0 0 1
m a s t e r m a y t e r m i n a t e d a t a t r a n s f e r b y g e n e r a t i n g a G N D S D A 1 0 0 0 0 1 0 S T A R T o r S T O P c o n d i t i o n . G N D S C L 1 0 0 0 0 1 1 W h e n r e a d i n g f r o m t h e I N A 2 0 9 , t h e l a s t v a l u e s t o r e d VS + G N D 1 0 0 0 1 0 0 i n t h e r e g i s t e r p o i n t e r b y a w r i t e o p e r a t i o n d e t e r m i n e s VS + VS + 1 0 0 0 1 0 1 w h i c h r e g i s t e r i s r e a d d u r i n g a r e a d o p e r a t i o n . T o
c h a n g e t h e r e g i s t e r p o i n t e r f o r a r e a d o p e r a t i o n , a VS + S D A 1 0 0 0 1 1 0 n e w v a l u e m u s t b e w r i t t e n t o t h e r e g i s t e r p o i n t e r . T h i s
VS + S C L 1 0 0 0 1 1 1 w r i t e i s a c c o m p l i s h e d b y i s s u i n g a s l a v e a d d r e s s b y t e
S D A G N D 1 0 0 1 0 0 0 w i t h t h e R / W b i t L O W , f o l l o w e d b y t h e r e g i s t e r p o i n t e r S D A V S + 1 0 0 1 0 0 1 b y t e . N o a d d i t i o n a l d a t a a r e r e q u i r e d . T h e m a s t e r S D A S D A 1 0 0 1 0 1 0 t h e n g e n e r a t e s a S T A R T c o n d i t i o n a n d s e n d s t h e
s l a v e a d d r e s s b y t e w i t h t h e R / W b i t H I G H t o i n i t i a t e S D A S C L 1 0 0 1 0 1 1 t h e r e a d c o m m a n d . T h e n e x t b y t e i s t r a n s m i t t e d b y
S C L G N D 1 0 0 1 1 0 0 t h e s l a v e a n d i s t h e m o s t s i g n i f i c a n t b y t e o f t h e
S C L V S + 1 0 0 1 1 0 1 r e g i s t e r i n d i c a t e d b y t h e r e g i s t e r p o i n t e r . T h i s b y t e i s S C L S D A 1 0 0 1 1 1 0 f o l l o w e d b y a n A c k n o w l e d g e f r o m t h e m a s t e r ; t h e n S C L S C L 1 0 0 1 1 1 1 t h e s l a v e t r a n s m i t s t h e l e a s t s i g n i f i c a n t b y t e . T h e
m a s t e r a c k n o w l e d g e s r e c e i p t o f t h e d a t a b y t e . T h e m a s t e r m a y t e r m i n a t e d a t a t r a n s f e r b y g e n e r a t i n g a N o t - A c k n o w l e d g e a f t e r r e c e i v i n g a n y d a t a b y t e , o r
T h e I N A 2 0 9 o p e r a t e s o n l y a s a s l a v e d e v i c e o n t h e g e n e r a t i n g a S T A R T o r S T O P c o n d i t i o n . I f r e p e a t e d I 2C b u s a n d S M B u s . C o n n e c t i o n s t o t h e b u s a r e r e a d s f r o m t h e s a m e r e g i s t e r a r e d e s i r e d , i t i s n o t m a d e v i a t h e o p e n - d r a i n I / O l i n e s S D A a n d S C L . T h e n e c e s s a r y t o c o n t i n u a l l y s e n d t h e r e g i s t e r p o i n t e r S D A a n d S C L p i n s f e a t u r e i n t e g r a t e d s p i k e b y t e s ; t h e I N A 2 0 9 r e t a i n s t h e r e g i s t e r p o i n t e r v a l u e s u p p r e s s i o n f i l t e r s a n d S c h m i t t t r i g g e r s t o m i n i m i z e u n t i l i t i s c h a n g e d b y t h e n e x t w r i t e o p e r a t i o n . t h e e f f e c t s o f i n p u t s p i k e s a n d b u s n o i s e . T h e I N A 2 0 9
F i g u r e 1 6 a n d F i g u r e 1 7 s h o w r e a d a n d w r i t e s u p p o r t s t h e t r a n s m i s s i o n p r o t o c o l f o r f a s t ( 1 k H z t o o p e r a t i o n t i m i n g d i a g r a m s , r e s p e c t i v e l y . N o t e t h a t 4 0 0 k H z ) a n d h i g h - s p e e d ( 1 k H z t o 3 . 4 M H z ) m o d e s . r e g i s t e r b y t e s a r e s e n t m o s t - s i g n i f i c a n t b y t e f i r s t , A l l d a t a b y t e s a r e t r a n s m i t t e d m o s t s i g n i f i c a n t b y t e f o l l o w e d b y t h e l e a s t s i g n i f i c a n t b y t e . F i g u r e 1 8 f i r s t . s h o w s t h e t i m i n g d i a g r a m f o r t h e S M B u s A l e r t r e s p o n s e o p e r a t i o n . F i g u r e 1 9 i l l u s t r a t e s a t y p i c a l r e g i s t e r p o i n t e r c o n f i g u r a t i o n .
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 1 1
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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Frame1Two-WireSlaveAddressB
yte
(1)
Frame2DataMSB
yte
(2)
1
StartB
y
Master
ACKB
y
INA209
ACKB
y
Master
From
INA209
1
9
1
9
SDA
SCL
0
0
A3
R/W
D15
D14
D13
D12
D11
D10
D9
D8
A2
A1
A0
Frame3DataLSB
yte
(2)
Stop
NoACKB
y(3)
Master
From
INA209
1
9
D7
D6
D5
D4
D3
D2
D1
D0
NOTES:
(1)
Th
ev
alu
eof
theSlav
eA
ddre
ssB
yteis
d
etermin
edb
ythesettin
gsof
theA
0an
dA1
pin
s.
Refer
toTa
ble1.
(2)
Readdataisfrom
thela
stre
gis
ter
poin
te
rlocation.If
an
ew
reg
isteris
desire
d,there
gis
ter
poin
term
ustbeu
pdated.
SeeFig
ure1
9.
(3)
ACK
by
Master
can
als
obesen
t.
Frame1
Two-WireSlaveAddressByte(1)
Frame2
RegisterPointerByte
StartBy
Master
ACKBy
INA209
ACKBy
INA209
1
9
1
ACKBy
INA209
1D15
D14
D13
D12
D11
D
10
D9
D8
9
9
SDA
SCL
1
0
0
A3
A2
A1
A0
R/W
P7
P6
P5
P4
P3
P2
P1
P0
NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedby
thesettingsoftheA0andA1pins.RefertoTable1.
Frame4DataLSBy
te
Frame3D
ataMSByte
ACKBy
INA209
StopBy
Master
1D7
D6
D5
D4
D3
D2
D1
D0
9
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
F i g u r e 1 7 . T i m i n g D i a g r a m f o r R e a d W o r d F o r m a t F i g u r e 1 6 . T i m i n g D i a g r a m f o r W r i t e W o r d F o r m a t
1 2 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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Frame1SMBusALERTResponseAddressByte Frame2SlaveAddressByte(1)
StartBy
Master
ACKBy
INA209
From
INA209
NACKBy
Master
StopBy
Master
1 9 1 9
SDA
SCL
ALERT
0 0 0 1 1 0 0 R/W 1 0 0 A3 A2 A1 A0 0
NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0andA1pins.RefertoTable1.
Frame1Two-WireSlaveAddressByte(1)
Frame2RegisterPointerByte
1
StartBy
Master
ACKBy
INA209
ACKBy
INA209
1 9 1 9
SDA
SCL
0 0 A3 A2 A1 A0 R/W P7 P6 P5 P4 P3 P2 P1 P0 Stop
NOTE(1):ThevalueoftheSlaveAddressByteisdeterminedbythesettingsoftheA0andA1pins.RefertoTable1.
I N A 2 0 9
w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
F i g u r e 1 8 . T i m i n g D i a g r a m f o r S M B u s A L E R T
F i g u r e 1 9 . T y p i c a l R e g i s t e r P o i n t e r S e t
C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d S u b m i t D o c u m e n t a t i o n F e e d b a c k 1 3
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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H i g h - S p e e d I 2C M o d e
SCL
SDA
t(LOW)tR tF t(HDSTA)
t(HDSTA)
t(HDDAT)
t(BUF)
t(SUDAT)
t(HIGH) t(SUSTA) t(SUSTO)
P S S P
I N A 2 0 9
S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
T h e m a s t e r t h e n g e n e r a t e s a r e p e a t e d s t a r t c o n d i t i o n( a r e p e a t e d s t a r t c o n d i t i o n h a s t h e s a m e t i m i n g a s
W h e n t h e b u s i s i d l e , b o t h t h e S D A a n d S C L l i n e s a r e t h e s t a r t c o n d i t i o n ) . A f t e r t h i s r e p e a t e d s t a r t c o n d i t i o n ,
p u l l e d h i g h b y t h e p u l l - u p d e v i c e s . T h e m a s t e r t h e p r o t o c o l i s t h e s a m e a s F / S m o d e , e x c e p t t h a t
g e n e r a t e s a s t a r t c o n d i t i o n f o l l o w e d b y a v a l i d s e r i a l t r a n s m i s s i o n s p e e d s u p t o 3 . 4 M b p s a r e a l l o w e d .
b y t e c o n t a i n i n g H i g h - S p e e d ( H S ) m a s t e r c o d e I n s t e a d o f u s i n g a s t o p c o n d i t i o n , r e p e a t e d s t a r t
0 0 0 0 1 X X X . T h i s t r a n s m i s s i o n i s m a d e i n f a s t c o n d i t i o n s s h o u l d b e u s e d t o s e c u r e t h e b u s i n
( 4 0 0 k b p s ) o r s t a n d a r d ( 1 0 0 k b p s ) ( F / S ) m o d e a t n o H S - m o d e . A s t o p c o n d i t i o n e n d s t h e H S - m o d e a n d m o r e t h a n 4 0 0 k b p s . T h e I N A 2 0 9 d o e s n o t
s w i t c h e s a l l t h e i n t e r n a l f i l t e r s o f t h e I N A 2 0 9 t o a c k n o w l e d g e t h e H S m a s t e r c o d e , b u t d o e s
s u p p o r t t h e F / S m o d e . r e c o g n i z e i t a n d s w i t c h e s i t s i n t e r n a l f i l t e r s t o s u p p o r t 3 . 4 M b p s o p e r a t i o n .
F i g u r e 2 0 . B u s T i m i n g D i a g r a m
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H o l d t i m e a f t e r r e p e a t e d S T A R T c o n d i t i o n . t( H D S T A ) 1 0 0 1 0 0 n s A f t e r t h i s p e r i o d , t h e f i r s t c l o c k i s g e n e r a t e d .
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S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . w w w . t i . c o m
W h e n t h e I N A 2 0 9 i s i n t h e n o r m a l o p e r a t i n g m o d e T h e C o n v e r s i o n R e a d y b i t c l e a r s u n d e r t h e s e ( t h a t i s , M O D E b i t s o f t h e C o n f i g u r a t i o n R e g i s t e r a r e c o n d i t i o n s : s e t t o ' 1 1 1 ' ) , i t c o n t i n u o u s l y c o n v e r t s t h e s h u n t 1 . W r i t i n g t o t h e C o n f i g u r a t i o n R e g i s t e r , e x c e p t v o l t a g e u p t o t h e n u m b e r s e t i n t h e s h u n t v o l t a g e w h e n c o n f i g u r i n g t h e M O D E b i t s f o r P o w e r D o w n a v e r a g i n g f u n c t i o n ( C o n f i g u r a t i o n R e g i s t e r , S A D C o r A D C o f f ( D i s a b l e ) m o d e s ; b i t s ) . T h e d e v i c e t h e n c o n v e r t s t h e b u s v o l t a g e u p t o
2 . R e a d i n g t h e S t a t u s R e g i s t e r ; o r t h e n u m b e r s e t i n t h e b u s v o l t a g e a v e r a g i n g
3 . T r i g g e r i n g a s i n g l e - s h o t c o n v e r s i o n w i t h t h e ( C o n f i g u r a t i o n R e g i s t e r , B A D C b i t s ) . T h e M o d e C o n v e r t p i n . c o n t r o l i n t h e C o n f i g u r a t i o n R e g i s t e r a l s o p e r m i t s
s e l e c t i n g m o d e s t o c o n v e r t o n l y v o l t a g e o r c u r r e n t , e i t h e r c o n t i n u o u s l y o r i n r e s p o n s e t o a n e v e n t ( t r i g g e r e d ) .
C u r r e n t a n d b u s v o l t a g e a r e c o n v e r t e d a t d i f f e r e n t p o i n t s i n t i m e , d e p e n d i n g o n t h e r e s o l u t i o n a n d A l l c u r r e n t a n d p o w e r c a l c u l a t i o n s a r e p e r f o r m e d i n a v e r a g i n g m o d e s e t t i n g s . F o r i n s t a n c e , w h e n t h e b a c k g r o u n d a n d d o n o t c o n t r i b u t e t o c o n v e r s i o n c o n f i g u r e d f o r 1 2 - b i t a n d 1 2 8 s a m p l e a v e r a g i n g , u p t o t i m e ; c o n v e r s i o n t i m e s s h o w n i n t h e E l e c t r i c a l 6 8 m s i n t i m e b e t w e e n s a m p l i n g t h e s e t w o v a l u e s i s C h a r a c t e r i s t i c s t a b l e c a n b e u s e d t o d e t e r m i n e t h e p o s s i b l e . A g a i n , t h e s e c a l c u l a t i o n s a r e p e r f o r m e d i n a c t u a l c o n v e r s i o n t i m e . t h e b a c k g r o u n d a n d d o n o t a d d t o t h e o v e r a l l
P o w e r - D o w n m o d e r e d u c e s t h e q u i e s c e n t c u r r e n t c o n v e r s i o n t i m e . a n d t u r n s o f f c u r r e n t i n t o t h e I N A 2 0 9 i n p u t s , a v o i d i n g
a n y s u p p l y d r a i n . F u l l r e c o v e r y f r o m P o w e r - D o w n r e q u i r e s 4 0 s . A D C O f f m o d e ( s e t b y t h e C o n f i g u r a t i o n R e g i s t e r , M O D E b i t s ) s t o p s a l l S h u n t v o l t a g e p e a k r e g i s t e r s h o l d t h e l o w e s t a n d c o n v e r s i o n s . h i g h e s t c o n v e r t e d r e a d i n g f o r t h e s h u n t v a l u e . T h e
s h u n t v a l u e m a y b e e i t h e r p o s i t i v e o r n e g a t i v e ; a s a I n t r i g g e r e d m o d e , t h e e x t e r n a l C o n v e r t l i n e b e c o m e s
r e s u l t , t h e r e i s a n e e d f o r a s i g n b i t i n e i t h e r r e g i s t e r . a c t i v e . C o n v e r t c o m m a n d s a r e i n i t i a t e d b y t a k i n g t h e
F o r i n s t a n c e , t h e S h u n t V o l t a g e P o s i t i v e P e a k C o n v e r t l i n e l o w f o r a m i n i m u m o f 4 s . T h e C o n v e r t
R e g i s t e r i n m o s t s y s t e m s r e c o r d s a p o s i t i v e v o l t a g e ; l i n e m a y b e c o n n e c t e d h i g h w h e n u n u s e d . A n y
i n m o s t u n i d i r e c t i o n a l c u r r e n t m e a s u r e m e n t r e - t r i g g e r o f t h e C o n v e r t l i n e d u r i n g a c o n v e r s i o n i s
a p p l i c a t i o n s , t h e S h u n t V o l t a g e N e g a t i v e P e a k i g n o r e d , a n d t h e C o n v e r t l i n e s t a t e i s d i s r e g a r d e d
R e g i s t e r a l s o r e c o r d s a p o s i t i v e v o l t a g e . H o w e v e r , u n t i l t h e c o n v e r s i o n e n d s . T h e r e a r e s e v e r a l a v a i l a b l e
c e r t a i n c o n d i t i o n s c a n o c c u r i n n o r m a l l y u n i d i r e c t i o n a l t r i g g e r e d m o d e s ; h o w e v e r , a l l c o n v e r s i o n s a r e
s y s t e m s t h a t c a u s e a n e g a t i v e p o l a r i t y a c r o s s t h e p e r f o r m e d r e p e a t e d l y u p t o t h e n u m b e r s e t i n t h e
s h u n t ; t h e s e e v e n t s a r e r e c o r d e d i n t h e S h u n t A v e r a g i n g f u n c t i o n ( C o n f i g u r a t i o n R e g i s t e r , B A D C
V o l t a g e N e g a t i v e P e a k R e g i s t e r . a n d S A D C b i t s ) . P e a k - h o l d r e g i s t e r s d o n o t r e c o r d c o n d i t i o n s t h a t
I f t h e C o n v e r t l i n e i s h e l d l o w , w r i t i n g a n y o f t h e t r i g g e r a C r i t i c a l C o m p a r a t o r s h u t d o w n . A C r i t i c a l
t r i g g e r e d c o n v e r t m o d e s i n t o t h e C o n f i g u r a t i o n C o m p a r a t o r s h u t d o w n o c c u r s w i t h i n 5 s o f d e t e c t i n g
R e g i s t e r ( e v e n i f t h e d e s i r e d m o d e i s a l r e a d y a c r i t i c a l c o n d i t i o n , w h i l e t h e A D C c o n v e r s i o n
p r o g r a m m e d i n t o t h e r e g i s t e r ) t r i g g e r s a s i n g l e - s h o t n e c e s s a r y t o r e c o r d a p e a k - h o l d r e q u i r e s 5 3 2 s .
c o n v e r s i o n . T h e r e f o r e , a s y s t e m s h u t d o w n r e m o v e s t h e f a u l tb e f o r e t h e a n a l o g - t o - d i g i t a l c o n v e r s i o n ( A D C ) c a n A l t h o u g h t h e I N A 2 0 9 c a n b e r e a d a t a n y t i m e , a n d r e c o r d i t . t h e d a t a f r o m t h e l a s t c o n v e r s i o n r e m a i n a v a i l a b l e ,
t h e C o n v e r s i o n R e a d y b i t ( S t a t u s R e g i s t e r , C N V R b i t ) i s p r o v i d e d t o h e l p c o - o r d i n a t e o n e - s h o t o r t r i g g e r e d c o n v e r s i o n s . T h e C o n v e r s i o n R e a d y b i t i s s e t a f t e r a l l c o n v e r s i o n s , a v e r a g i n g , a n d m u l t i p l i c a t i o n o p e r a t i o n s
a r e c o m p l e t e .
1 6 S u b m i t D o c u m e n t a t i o n F e e d b a c k C o p y r i g h t 2 0 0 7 2 0 0 9 , T e x a s I n s t r u m e n t s I n c o r p o r a t e d
P r o d u c t F o l d e r L i n k ( s ) : I N A 2 0 9
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w w w . t i . c o m . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S B O S 4 0 3 B J U N E 2 0 0 7 R E V I S E D M A R C H 2 0 0 9
T h e C r i t i c a l C o m p a r a t o r f u n c t i o n i s i n c l u d e d t o I f l a r g e r f u l l - s c a l e s h u n t v o l t a g e s a r e d e s i r e d , t h ep r o v i d e t h e f a s t e s t p o s s i b l e r e s p o n s e t o o v e r l o a d I N A 2 0 9 p r o v i d e s a P G A f u n c t i o n t h a t i n c r e a s e s t h e e v e n t s . T h i s f u n c t i o n b y p a s s e s t h e d i g i t a l c i r c u i t b y f u l l - s c a l e r a n g e u p t o 2 , 4 , o r 8 t i m e s ( 3 2 0 m V ) . c a p t u r i n g t h e e v e n t i n t h e a n a l o g d o m a i n . A d d i t i o n a l l y , t h e b u s v o l t a g e m e a s u r e m e n t h a s t w o
f u l l - s c a l e r a n g e s : 1 6 V o r 3 2 V .
T h e C r i t i c a l C o m p a r a t o r r e s p o n d s o n l y t o s h u n tv o l t a g e , a n d c a n b e p r o g r a m m e d f o r a v a l u e f r o m 0 m V t o 2 5 5 m V ( i n 1 m V i n c r e m e n t s ) i n t h e C r i t i c a l D A C + a n d C r i t i c a l D A C R e g i s t e r s . T w o t h r e s h o l d s T h e I N A 2 0 9 i s d e s i g n e d f o r c o m p a t i b i l i t y w i t h h o t a r e p r o v i d e d , a l l o w i n g u s e r s t o s e t d i f f e r e n t s w a p c o n t r o l l e r s s u c h t h e T I T P S 2 4 9 0 . T h e T P S 2 4 9 0 t h r e s h o l d s i n s y s t e m s w h e r e b i - d i r e c t i o n a l c u r r e n t u s e s a h i g h - s i d e s h u n t w i t h a l i m i t a t 5 0 m V ; t h e m e a s u r e m e n t o c c u r s . F o r e x a m p l e , a p o w e r s u p p l y I N A 2 0 9 f u l l - s c a l e r a n g e o f 4 0 m V e n a b l e s t h e u s e o f m a y r e a d i l y a l l o w s o u r c i n g o f 1 0 A , b u t m u s t i n d i c a t e t h e s a m e s h u n t f o r c u r r e n t s e n s i n g b e l o w t h i s l i m i t . a n a l a r m w h e n e v e r s i n k i n g m o r e t h a n 1 A . T h e W h e n s e n s i n g i s r e q u i r e d a t ( o r t h r o u g h ) t h e 5 0 m V S M B u s A l e r t M a s k / E n a b l e C o n t r o l R e g i s t e r a l l o w s t h e s e n s e p o i n t o f t h e T P S 2 4 9 0 , t h e P G A o f t h e I N A 2 0 9 u s e r t o e n a b l e o r d i s a b l e t h e C r i t i c a l p i n o u t p u t c a n b e s e t t o 2 t o p r o v i d e a n 8 0 m V f u l l - s c a l e r a n g e . t h r o u g h t h e C R E N b i t . T h e C R E N b i t a f f e c t s o n l y t h e
A t y p i c a l a p p l i c a t i o n c o n n e c t s t h e C r i t i c a l p i n o u t p u t C r i t i c a l p i n ; i t d o e s n o t a f f e c t t h e C R I T + o r C R I T t o t h e T P S 2 4 9 0 e n a b l e l i n e ; t h i s c o n f i g u r a t i o n f l a g s w i t h i n t h e S t a t u s R e g i s t e r . e n a b l e s u s e r - p r o g r a m m a b l e c u r r e n t l i m i t s . N o t e t h a t
T h e C r i t i c a l C o m p a r a t o r o u t p u t f i l t e r i s s e t b y t h e C F t h e l a t c h e d m o d e s h o u l d b e u s e d f o r t h e C r i t i c a l p i n b i t s o f t h e C r i t i c a l D A C R e g i s t e r . T h i s f i l t e r o u t p u t t o a v o i d o s c i l l a t i o n a t t h e t r i p l e v e l . d e t e r m i n e s t h e d u r a t i o n o f t i m e t h a t t h e C M P o u t p u t m u s t b e c o n t i n u o u s l y a c t i v e ( n o t t o g g l i n g ) t o p r o p a g a t e t o t h e C r i t i c a l p i n o u t p u t a n d s e t t h e C R I T +
M e a s u r i n g c u r r e n t i s o f t e n n o i s y , a n d s u c h n o i s e c a n o r C R I T f l a g s w i t h i n t h e S t a t u s R e g i s t e r . b e d i f f i c u l t t o d e f i n e . T h e I N A 2 0 9 o f f e r s s e v e r a l
W h i l e t h e C r i t i c a l C o m p a r a t o r o u t p u t f i l t e r p r o v i d e s o p t i o n s f o r f i l t e r i n g b y c h o o s i n g r e s o l u t i o n a n d s e t t i n g s f r o m 0 m s t o 0 . 9 6 m s , t h e C M P i s a c t u a l l y a v e r a g i n g i n t h e C o n f i g u r a t i o n R e g i s t e r . T h e s e s t r o b e d e v e r y 4 s , p r o v i d i n g m u l t i p l e s a m p l e s p e r f i l t e r i n g o p t i o n s c a n b e s e t i n d e p e n d e n t l y f o r e i t h e r d e l a y p e r i o d . F o r t h e C r i t i c a l o u t p u t p i n t o b e c o m e v o l t a g e o r c u r r e n t m e a s u r e m e n t . a c t i v e , t h e c r i t i c a l c o n d i t i o n m u s t b e t r u e f o r e v e r y
T h e i n t e r n a l A D C i s b a s e d o n a d e l t a - s i g m a ( )s a m p l e d u r i n g t h e s p e c i f i e d d e l a y p e r i o d . f r o n t - e n d w i t h a 5 0 0 k H z ( 1 0 % ) t y p i c a l s a m p l i n g r a t e .
W h e n u s i n g t h e C r i t i c a l C o m p a r a t o r i n u n i d i r e c t i o n a l T h i s a r c h i t e c t u r e h a s g o o d i n h e r e n t n o i s e r e j e c t i o n ; a p p l i c a t i o n s ,