AD876
TP3
1
U4
74F04
+5VD
JP4
C50
10 F
+5VD
JP1
15
16
STBY
VP6
3ST
VP5
4
3
R1
51
U4
74F04
2
CLK_IN
TP1
TP4
J1
+
U1
AD876
CLK
13
3_STATE DRV
SS
12 9
17 STBY
DB9
18 DV
DD
DB 8 11 8
DV
SS
14
JP2
VP8
C62
0.1 F
REFTS
VP3
REFTS
REFTF
REFBF
REFBS
VP4
REFBS
REFTF
VP1
REFBF
VP2
C64
0.1 F
19 SUBST
20 NC
21 REFTS
22 REFTF
NC
23
REFBF
24
REFBS
25
CML
26 AIN
27 AV
DD
28
DB7 10 7
DB6 9 6
DB5 8
DB4 7
DB3
DB2
DB1
DB0
DRV
DD
AV
SS
6
5
4
3
2
1
5
4
3
2
1
0
5
6
7
8
9
U2
74ALS541
1
G1
19
11
G2
9 A7 Y7 12
Y6
8 A6
Y5 13
7 A5
Y4 14
6 A4 Y3 15
5 A3 Y2 16
4 A2 Y1 17
3 A1 Y0 18
2 A0
U3
1
19
9
8
7
6
5
4
3
2
G1
G2
A7
A6
A5
A4
A3
A2
A1
A0
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
11
12
13
14
15
16
17
18
P1
P1
D9 R2
*
D8 R3
*
D5
D6
D7
D8
D9
D7 R4
*
D6 R5 *
D5 R6 *
D4 R7 *
D3 R8
*
D2 R9 *
D1 R10 *
D0 R11
*
D0
D1
D2
D3
D4
P1
P1
P1
1
3
5
7
9
P1
P1
P1
P1
2
4
6
8
P1 10
P1 12
P1 14
P1 16
P1 18
P1 20
P1 22
P1 24
P1 26
P1 28
P1 30
P1 32
P1 34
P1 36
P1 38
P1 40
P1 11
P1 13
P1 15
P1 17
P1 19
P1 21
P1 23
P1 25
P1 27
P1 29
0
1
2
3
4
R12
*
P1 31
P1 33
P1 35
P1 37
P1 39
74ALS541
C56
0.1 F
C4
10 F
+
+
C2
10 F
+5VA
+5VD
+
C49
10 F
R16
1k
DC_IN
R14
100
EXT_CM 2
JP5
1
艾因
J2
C1
0.1 F
TP18
R17
1.13k
*
R2–R12 = 20
C54
0.1 F
R18
1k
3 INT_CM
TP2
C3
47 F
+
R15
51
图23. AD876评估板电路图
–12–
版本B
