Table of Contents
Advertisement
3.4.7.2. Specification of the inputs and outputs of the OA 0063
Pin nr.
Name
Desciption
Ref . current adjustment
Smooth ing Capacitor
I R e I C o m m o n
S u p p l y ( - 8 , 5 V )
R a n g e B
O u t p u t v o l t a g e
C . C o m p e n s a t i o n
+ I n p u t
- I n p u t
R a n g e C
R a n g e . A
S u p p l y ( + 8 , 5 V )
G R O U N D +
5 7
R N G A
R N G B
R N G C
1
0
1
0
I
I
0
0
1
1
1
0
0
0
0
1
2
3
5
6
7
8
9
1 0
l 1
l r s
t r c
C clock
C c l o c k
R N G B
v o u t
C c o m p .
W i t h R s t h e o u t p u t c u r r e n t c a n b e a d j u s t e d .
Smoothing capacitor for the switched currents.
C o m m o n c o n n e c t i o n o f R s a n d R p .
N e g a t i v e s u p p l y v o l t a g e { - 8 , 5 V )
C a p a c i t o r f o r t h e c l o c k - o s c i l l a t o r
R a n g e i n f o r m a t i o n ( s e e 1 2 , 1 3 ) .
O u t p u t o f t h e c o m p e n s a t i o n a m p i i f r e r .
C o m p e n s a t i o n c a p a c r t o r f o r t h e c o m p e n s a t i o n a m p l i f i e r .
+ a n d - i n p u t o f t h e c o m p e n s a t i o n / p r o t e c t i o n a m p l i f i e r .
C o m p e n s a t i o n : W i t h t h e a m p l i f i e r t h e c u r r e n t c o n s u m p t i o n o f
t h e A D C i s c o m p e n s a t e d d u r i n g O m e a s u r e m e n t s .
P r o t e c t i o n : W i t h t h e a m p l i f i e r a l s o t h e l e a k c u r r e n t t h r o u g h t h e
p r o t e c t i o n d i o d e s d u r i n g O m e a s u r e m e n t s i s c o m p e n s a t e d .
T o g e t h e r w i t h s i g n a l R N G B t h e s i g n a l s d e t e r m i n e t h e d i g i t a l
r a n g e i n f o r m a t i o n f r o m t h e O O 0 0 5 9 .
R a n g e
lvleasuring current
12
R N G C
R N G A
1 k o
1 0 k o
1 0 0 k o
1 l \ , 1 0
1 O M Q
l m A
100 /rA
1 0 i r A
l g A
1 0 0 n A
't4
t c
t o
1 7
1 8
v d d
G N D
I o u t
t r p
P o s i t i v e s u p p l y v o l t a g e .
S u p p l y z e r o . $
O u t P u t c u r r e n t .
S m o o t h i n g c a p a c i t o r
With Rp the temperature'coefficient of the reference current is
d e t e r m i n e d .
Hide quick links:
Advertisement
Table of Contents
