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ti
12500 TI Boulevard. Dallas, Texas 75243
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Revision History
REV ECN Number Approved
DOCUMENT CONTROL #:
23
Analog-to-Digital Converter
A
DATE: 22-Oct-2003
Analog-to-Digital Converter
6446998
C21
0.01uF
C43
0.1uF
C42
0.1uF
C48
0.01uF
C41
0.01uF
C47
0.1uF
C52
0.1uF
C44
0.01uF
C55
0.1uF
C56
0.01uF
+5VCC
+5VCC
+5VCC
+5VCC
C54
0.1uF
C50
.01uF
+5VCC
C51
0.1uF
C53
0.01uF
+VBD
B_CS
B_RD
B_CONVST
B_BYTE
BUSY
B_RESET
+VBD
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
DB8
DB9
DB10
DB11
DB12
DB13
DB14
DB15
C46
0.01uF
C40
0.1uF
+5VCC
BUSY
DB[15...0]
B_CS
B_RD
B_BYTE
B_CONVST
B_RESET
-IN
-VCC
+VCC
C34
68pF
R7
1k
C7
0.1uF
C31
1uF
C37
1uF
C15
0.1uF
R12
25
C38
NI
R10
1k
R13
25
C39
NI
+IN
C33
1uF
R5
100
EXT_REF
R4
910
DB[15...0]
R11
NI
R1
1k
TP4
31
2
SJP2
+
C49
10uF
C8
0.1uF
C13
0.01uF
+VBD
5
4
8
1
2
+
-
VOCM
VOUT-
VOUT+
36
+VCC
-VCC
7
NC
U2
THS4503
12
SJP3
IN
1
OUT
2
GND
3
U1
REF3040
+5VCC
C16
1uF
C17
6800pF
NC
1
+VIN
2
EN
3
GND
4
NC
5
VREF
6
NC
7
NC
8
U9
NI
+5VCC
C18
0.01uF
C45
0.1uF
C30
22uF
R21
0
R14
100
C61
NI
-VCC
C59
1uF
C36
0.1uF
+VCC
C32
0.1uF
C60
1uF
IN
1
OUT
2
GND
3
U3
REF3040
+5VCC
R3
NI
3 1
2
SJP5
3 1
2
SJP4
R2
NI
3
2
6
7 4
5
1
8
U8NI
R9
10k
R15
0
R6
NI
R8
NI
R22
NI
REFIN
1
REFOUT
2
NC
3
+VA
4
AGND
5
+IN
6
-IN
7
AGND
8
+VA
9
+VA
10
AGND
11
AGND
12
AGND
14
AGND
15
DB15
16
DB14
17
DB13
18
DB12
19
DB11
20
DB10
21
DB9
22
DB8
23
+VBD
24
BDGND
25
DB7
26
DB6
27
DB5
28
DB4
29
DB3
30
DB2
31
DB1
32
DB0
33
+VBD
34
BDGND
35
BUSY
36
+VBD
37
RESET
38
BYTE
39
CONVST
40
RD
41
CS
42
+VA
43
AGND
44
AGND
45
+VA
46
REFM
47
REFM
48
+VA
13
U4
ADS8402/ADS8412
C35
68pF
C62
0.1uF
C65
0.01uF
R23
50
Lijoy Philipose
Lijoy Philipose