M B4052
M B40 52 P i n Description
1/0
Signal Pin Functions
P i n N o .
P i n N a m e
2
R a n g e e x p a n d e r
i n put
3
R a n g e expander
output
4 - 7
A n a l o g entrance
9
C h a n n e l select i n p u t
1 0
1 1
C h i p s e l ect i n p ut
1 2
A/D convertion
clock
1 3
D ata output
1 4
R a n g e select i n p ut
1
A n a l o g g r o u n d
8
D i g ital g r o u n d
1 5
Power s u p p l y p i n 2
1 6
Power s u p p l y p i n 1
•
Channel Select
S y m b o l
E x .
2
E x . 1
Ao - A 3
C o
c ,
cs
A D C
C L K
DATA
O U T
RS
A . G
D . G
Vcc2
Vee,
c ,
C o
S e l e cted C h .
0
0
Ao
0
1
A ,
1
0
A 2
1
1
A 3
TS-4408
SEM ICON D UCTOR
Vccl
Vcc2
A .G
D.G
F u n ct i o n
A n a l o g i n put p i n for expa n d i n g the r a n g e .
A n a l o g output p i n for expa n d i n g the rang e . C o n n ect to a n y p i n from A O to A 3 .
B y u s i n g E x . 1 , E x . 2 , t h e r a n g e i s e x p a n d e d t o t h e
x
4 r a n g e .
4-ch a n a l o g i n put p i n . C h a n n e l 1 is s e l ected b y c h a n n e l select i n put C O t o C 1 .
The i n p u t p i n to d e s i g n ate t h e a n a log i n p u t c h a n n e l for A /D c o n verte r . T h i s s i g n a l i s l atched
at the trai l i n g e d g e of C S .
T h i s i s t h e c h i p select i n p u t p i n . W h e n
i s i n v e rted from " 1 " to " O " , AID convert i n g
sta rts a n d d a t a o u t p u t is e n a bled . A f t e r A /D c o n verti n g is over o r w h e n a n i nterrupt i s r e -
q u i re d , s e t the C S back to " 1 " .
T h i s i s the c l o c k i n p u t p i n for A/D c o n vertion i n p u t t o the c o m p a rator reg iste r s e q u e n ti a l l y .
C o n vertion speed is determ i n e d by t h e c l o c k speed . I n the c a s e of 8-bit, a p p r o x . 1 0 c l o c k s
w i l l be needed . However, it i s not n e c es s a ry that t h e c l o c k period be fixed .
T h i s is the o p e n collector to output t h e result of A /D converti o n . The d ata is output in the
o r d e r of t h e sta rt bit, m ost s i g n i f i c a n t bit, 2 n d sig n ificant bit, . . . , least s i g n i f i c a n t b i t , a n d
t h e s t o p b i t , s y n c h r o n i z e d w i t h A D C C LK .
T h i s is the i n put p i n for selecting the voltage r a n g e of a n a log i n p u t . The V F S
=
V c c 1 /8 r a n g e
i s sel ected at " O " , a n d the r a n g e of FVS
=
V c c 1 12 i s s e l ected at " 1 " . D u ri n g c o n verti o n ,
h o l d t h i s p i n to " O " o r " 1 " .
G ro u n d term i n a l
W h e n d r i v i n g w i t h 3 . 5 to 6 . 0 V of power, c o n n ect V c c 1 a n d Vcc2 to each other, a n d apply
the power voltage to t h e m .
W h e n d r i v i n g 8 to 1 8 V of p o w e r , a p p l y the p o w e r voltage to V c c 2 . At t h i s t i m e , the 5 V
sta b i l i zed voltage is output to V ee , , a n d a p p rox . 1 0 mA c u rrent c a n be s u p p l ied extern a l l y
to the I C .
W h e n either 3 . 5 - 6 . 0 V or 8 - 1 8V power is u s e d , V e e , i s the refe rence voltage for A /D
c o n ve rti o n .
•
Range select
RS
vol-
tage r a n g e
0
V e e ,
o -
--
8
1
V e e ,
o -
--
2
•
Wiring exam ple when e x panding the range
VA
E X .
2
A n a l o g input
VA
4
VA : O'V Vcc1 x 2
R S =
" 1 "
E X . I
M 8 4052
2 9
