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ManualsBrandsANALOG DEVICES ManualsData collecting ICsData acquisition IC - AD converter (ADC) Internal LQFP 48
19202122232425262728
AD9218
Rev. C | Page 22 of 28
P6
P5
P7
V
DD
V
D
V
DL
+
+++++ +
C37
10µF
C38
10µF
C16
10µF
C17
10µF
C18
10µF
C19
10µF
C26
10µF
GND
–5V +5V V
D
V
DD
V
DL
V
REF
AV
REF
B
V
DL
V
DD
GND
V
D
1
2
3
4
P1
V
REF
B
V
REF
A
GND
GND
1
2
3
4
P4
GND
–5V
+5V
GND
1
2
3
4
P11
H3
MTHOLE6
H1
MTHOLE6
H2
MTHOLE6
H4
MTHOLE6
GND
02001-045
V
D
ENC
A
V
DD
GND
D9
A
(MSB)
D8
A
D7
A
D6
A
D5
A
D4
A
D3
A
D2
A
C7
0.1µF
C8
0.1µF
GND
GND
D1
A
D0
A
GND
V
DD
GND
V
D
GND
V
DD
GND
D0
B
D1
B
C4
0.1µF
GND
C3
0.1µF
GND
C1
0.1µF
GND
D2
B
D3
B
D4
B
D5
B
D6
B
D7
B
D8
B
(MSB) D9
B
GND
V
DD
ENC
B
V
D
C5
0.1µF
C6
0.1µF
GND
GND
GND
AMPOUTA
AMPOUTB
AMPOUTAB
REFOUT
GND
C10
0.1µF
C9
0.1µF
C11
0.1µF
C31
0.1µF
C14
0.1µF
R4
0Ω
R5
0Ω
R33
0Ω
C15
0.1µF
C13
0.1µF
R35
0Ω
R1
36Ω
R2
36Ω
R36
0Ω
R34
36Ω
R32
36Ω
R6
25Ω
GND
GND
GND
GND
GND
R3
50Ω
GND
1
2
6
5
GND
GND
34
34
T2
1
2
6
5
J4
GND
AMPINA
AMPINB
AIN A
J1
GND
AIN B
R38
25Ω
R7
50Ω
GND
E17
E18
E1
E19
E27
E30E2
E25
VD
VREFA
E20
E24
E22
VD E29
GND
E23
E26
VD E28
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
GND
A
IN
A
A
IN
A
DFS/GAIN
REF
IN
A
REF
OUT
REF
IN
B
S1
S2
A
IN
B
A
IN
B
GND
48
47
46
45
44
43
42
41
40
39
38
37
13
14
15
16
17
18
19
20
21
22
23
24
V
D
ENC
A
V
DD
GND
D9
A
D8
A
D7
A
D6
A
D5
A
D4
A
D3
A
D2
A
AD9218
U1
V
D
ENC
B
V
DD
GND
D9
B
D8
B
D7
B
D6
B
D5
B
D4
B
D3
B
D2
B
D1
A
D0
A
GND
V
DD
GND
V
D
V
D
GND
V
DD
GND
D0
B
D1
B
GND
C12
0.1µF
GND
GND
GND
AMPOUTBB
R SINGLE-ENDED
R SINGLE-ENDED
R37
0Ω
C30
0.1µF
C39
0.1µF
2Y
6
3A
9
GND
7
3Y
8
1A
1
1B
2
1Y
3
2A
4
2B
5
VCC
4B
4A
4Y
3B
14
13
12
11
10
E4E3
ENCXA
ENCXA ENCA
GND
GND
GND
GND
VDL
TIEA
VDL
VDL
CLKLATA
GND
R39
1kΩ
R41
1kΩ
R11
50Ω
C40
0.1µF
J3
GND
ENCODE A
VDL
R44
1kΩ
R42
0Ω
R43
0Ω
C25
0.1µF
E13
E14
E12
VDL
E15
GND
GND
R46
1kΩ
R47
1kΩ
R9
0Ω
DRA
R10
0Ω
U6
SN74VCX86
**DUT CLOCK SELEC TABLE**
**TO BE DIRECT OR BUFFERED**
DRB
R12
0Ω
4B
13
1B
2
VCC
14
1A
1
3Y
8
3A
9
3B
10
4Y
11
4A
12
GND
2Y
2B
2A
1Y
7
6
5
4
3
U5
SN74VCX86
ENCXB
GND
VDL
TIEB
GND
R52
1kΩ
R54
1kΩ
R51
51Ω
C42
0.1µF
J2
GND
ENCODE B
ENCX
B
ENC
B
R53
0Ω
R50
0Ω
E36E35
GND
GND
GND
VDL
VDL
R49
1kΩ
C41
0.1µF
VDL
E34
E37
E16
VDL
E38
GND
GND
R48
1kΩ
R55
1kΩ
CLKLATB
R13
0Ω
**DUT CLOCK SELEC TABLE**
**TO BE DIRECT OR BUFFERED**
J5
GND
R14
50Ω
GND
R20
0Ω
R40
0Ω
TIEA
TIEB
ENC
A
ENC
B
R8
0Ω
TO TIE CLOCKS TOGETHER
GND
REF
IN
B
C24
0.1µF
GND
REF
IN
A
C27
0.1µF
T1
Figure 45. PCB Schematic