94
Date:
May 7, 1996
Sheet
8
o
f
11
Size
Document Number
REV
B
ZD5015
C
Title
SCHEMATIC, MAIN BOARD 9180
(404) 587-4040
Roswell, Georgia 30076
33 Mansell Court
AVL Scientific Corp.
ADDAT[0..7]
ADDAT0
ADDAT[0..7]
A/D CONVERTER
B1
16
B2
15
B3
14
B4
13
B5
12
B6
11
B7
10
B8
9
B9
8
B10
7
B11
6
B12
5
OR
4
POL
3
STATUS
2
INHI
35
INLO
34
COMMON
33
REFIN+
36
REFIN-
39
37
REFCAP-
38
REFOUT
29
BUFFER
30
AZ
31
INT
32
TEST
17
MODE
21
LBEN
18
HBEN
19
CE/LOAD
20
RUN/HOLD
26
SEND
27
OSCSEL
24
BUFFOSCOUT
25
OSCIN
22
OSCOUT
23
V-
28
GND
1
V+
40
U20
ICL7109
1
2
R61
100K
1
2
C54
1nF
X0
13
X1
14
X2
15
X3
12
X4
1
X5
5
X6
2
X7
4
INH
6
A
11
B
10
C
9
X
3
VSS
8
VEE
7
VDD
16
U19
4051
ANALOG CHANNEL SELECTOR
1
2
R69
1K
1
2
R68
1K
1
2
R67
1K
KOUT
TEMPOUT
Cl/Ca/LiOUT
NaOUT
1
2
R66
1K
ADSEL0
ADSEL1
ADSEL2
+5VA
+2.500V
"2.500V"
2.05V
1
2
R60
100
VIN
1
GND
3
VOUT
2
U21
MC1403
1
2
R70
1K
1
2
C56
150nF
1
2
R73
4.53K 1%
1
2
R72
1K 1%
+5VA
-5VA
1
TP14
TP
1
2
C55
330nF
1
2
C57
1uF
1
2
X1
3.58MHz
1
2
R71
200K 1%
VCC
ADSTATUS
ADDAT1
ADDAT2
ADDAT3
ADDAT4
ADDAT5
ADDAT6
ADDAT7
ADDAT0
ADDAT1
ADDAT2
ADDAT3
ADDAT4
ADDAT5
VCC
-5VA
NOTE:
1 LSB APPROXIMATELY 1mV
ADLBEN-
ADHBEN-
ADCE-
ADRUN
DGND
GND
SBC PCB - ANALOG SELECTOR AND A/D CONVERTER - 9180, 81