AD768
REV. B
–17–
IOUTA
NR
REFOUT
NC
REFCOM
IREFIN
DB0 (LSB)
DB1
DB2
DB3
DB4
DB5
DB6
DB7
LADCOM
IOUTB
(–5V) VEE
(+5V) VDD
(MSB) DB15
DB14
DB13
DB12
DB11
DB10
DB9
DB8
CLOCK
DCOM
AD768
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
C18
0.1F
C2
1F
C1
1F
R1
499
A
R12
10k
31
29
27
25
23
21
19
17
R13
R14
R15
R16
R17
R18
R19
R20
0
TP1
J1
1
2
SW2
C4
1F
C19
0.1F
C3
1F
C17
0.1F
A
C15
47F, 25V
C16
0.1F
C13
47F, 25V
C14
0.1F
A
R21
R23
R24
R25
R26
R27
R28
R29
0
1
3
5
7
9
11
13
15
J1
–5A
+5D
33
J1
CLOCK
1
2
1
2
SW1
2
4
6
8
10
12
14
J1
16
18
20
22
24
26
28
J1
30
32
34
36
38
40
J1
AGND CONNECTED TO DGND
ON GND PLANE UNDER U1
IN BETWEEN PINS 5 AND 25
DGND
AGND
A
C11
47F, 25V
C12
0.1F
C9
47F, 25V
C10
0.1F
A
–VEE
+VCC
A
C7
0.1F
+VCC
–VEE
A
AD811
7
6
2
3
4
U3
U1
R10
499
50
JP5
R6
∞
C5
0.1F
A
+VCC
–VEE
A
AD811
7
6
2
3
4
U2
R5
499
C6
0.1F
A
C8
0.1F
AB
1
22
JP1
JP2
50
4:1
3
1
T1
45
6
JP3
JP4
R9
100
R3
24.9
R2
24.9
R8
∞
A
R7
100
R11
50
A
Figure 35. AD768 Evaluation Board Schematic