National Semiconductor ADC14DC105, Руководство пользователя

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6.0 Hardware Schematic
C31
0.01uF C32
.1uF
DB9
VD
U12
LM1117/TO-252
VIN
3
A
D
J
1
VOUT
2
DB10
VCLK
+ C59
22uF
U13
LM1117/TO-252
VIN
3
A
D
J
1
VOUT
2
R124
124
R123
205
+ C110
22uF
D
B
7
Vref t_B
C8
.1uF
D
B
6
C9
.1uF
C103
0.01uF C104
.1uF
D
B
5
R120
124
D
B
4
+
C101
22uF
D
B
3
PD
R121
205
D
B
2
C85
0.01uF C86
.1uF
C11
.1uF
C87
.1uF
D
B
1
C15
.1uF
C88
0.01uF
C14
.1uF C13
1uF
C89
0.01uF C90
.1uF C91
.1uF
+ C41
10uF
C84
0.01uF
+5V
3
1
2
L4 P
NC
D3
BAT54
R125 22.1
U7
LP2988AIM-2.5
By pass
1
Delay
2
GND
3
Vin
4
Shutdown/
8
Error/
7
Sense
6
Vout
5
C57
0.01uF
C40
4.7u
C26
0.01uF
C25
.1uF
ANALOG BYPASSING
D
B
0
C27
0.01uF C28
.1uF C29
0.01uF C30
.1uF
VA
VD
+5V
C21
.1uF
C43
.1uF C42
0.01uF
+
C19
22uF
+
C20
10uF
L1 JR1
+5V
GND
1
PWR
2
+3.3V
+2.5V
Output
Output Measurement
DA[0..13]
DB[0..13]
DRDY
Vref t_A
DA[0..13]
D
A
1
3
Vref b_A
Vref b_B
D
A
1
2
C39
0.01uF
Vref t_B
C44
.1uF
D
A
1
1
D
A
1
0
Input
Analog Input
VCOM_A
VCOM_B
Vin_A-
Vin_A+
Vin_B+
Vin_B-
D
A
9
C45
0.01uF C46
.1uF
D
A
8
L3
Vref t_A
Vref b_A
D
A
7
D
A
6
DA5
DA4
DA3
DA2
VA
Y 1
Oscillator/4smd
NC
1
GND
2
OUT
3
VDD
4
+
C24
22uF
DA1
+5V
DA0
C23
.1uF
L5
+
C48
10uF
+5V
3
1
2
L4 P
NC
D4
BAT54
U6
LP2988AIM-3.3
By pass
1
Delay
2
GND
3
Vin
4
Shutdown/
8
Error/
7
Sense
6
Vout
5
C58
0.01uF
C47
4.7u
C49
0.01uF C50
.1uF C51
.1uF C52
0.01uF
+5V
C53
0.01uF C54
.1uF
Vref b_B
C55
.1uF C56
0.01uF
LATCH BYPASSING
VD2
+3.3V
+
C100
22uF
DB[0..13]
L4
TP1
GND
1
TP2
GND
1
TP3
GND
1
TP4
GND
1
C5
.1uF
JP14
PD_A 1
2
C2
.1uF
R7
22.1
VA2
J1
External Clock
2 3 4 5
1
R3
1k
R5
1k
R8
49.9
C33
.1uF
U11
NC7WV125
GND
4
VCC
8
OE1
1
OE2
7
A1
2
A2
5
Y 1
6
Y 2
3
CLK
JP10
jumper/sm
C10
.1uF
DB11
DB12
DB13
JP4
jumper/sm
DB8
JP12
jumper/sm
R19
40.2k
VA2
JP3
jumper/sm
R14 22.1
CLK
C7
1uF
R17
40.2k
VD
VA
+ C35
22uF
VCLK
C36
.1uF
C12
1uF
C37
0.01uF
PD
VA2
VA
JP17
OF/DCC
2
4
6
8 1
3
5
7
R20
1K
+ C18
22uF + C16
10uF + C17
10uF
R21
1K
VA
VD VA
JP16
PD_B
1 2
R22
1K
VA
CLK
U3
ADC14DC105
VinA-
2
AGND
1
VinA+
3
VinB-
14
VinB+
13
C
L
K
1
8
O
F
/D
C
C
1
9
N
/C
5
6
P
D
_
B
2
0
Vref b_A
6
Vref b_B
10
Vref t_A
5
Vref t_B
11
V
re
f
5
9
Vcom_A
7
Vcom_B
9
DA0
40
DA1
41
DA2
42
DA3
43
DA4
44
DA5
45
D
A
6
4
6
D
A
7
4
7
D
A
8
4
8
D
A
9
4
9
D
A
1
0
5
2
D
A
1
1
5
3
D
A
1
2
5
4
D
A
1
3
5
5
D
B
0
2
1
D
B
1
2
2
D
B
2
2
3
D
B
3
2
4
D
B
4
2
7
D
B
5
2
8
D
B
6
2
9
D
B
7
3
0
DB8
31
DB9
32
DB10
33
DB11
34
DB12
35
DB13
36
DRDY
39
VA
8
V
A
1
6
V
A
1
7
V
A
5
8
V
A
6
0
AGND
4
AGND
12
AGND
15
P
D
_
A
5
7
V
D
R
2
6
VDR
38
V
D
R
5
0
D
R
G
N
D
2
5
DRGND
37
D
R
G
N
D
5
1
L2
C102
.1uF
C22
.1uF