Datasheet

14
LTC1420
1420fa
J1
BNC
E6
1 AGND
(J5)
(SMB)
1
+A
IN
2
1
2
R15
51Ω
OPT
5
4
3
2
J2
BNC
(J6)
(SMB)
1
–A
IN
2
R16
51Ω
OPT
5
4
3
2
2C
2D8
2D7
GND
2D6
2D5
V
CC
2D4
2D3
GND
2D2
2D1
1D8
1D7
GND
1D6
1D5
V
CC
1D4
1D3
GND
1D2
1D1
1C
2OE
2Q8
2Q7
GND
2Q6
2Q5
V
CC
2Q4
2Q3
GND
2Q2
2Q1
1Q8
1Q7
GND
1Q6
1Q5
V
CC
1Q4
1Q3
GND
1Q2
1Q1
1OE
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
D5
D4
D3
D2
D1
D0
OGND
OV
DD
V
DD
GND
V
SS
CLK
OF
GAIN
D6
D7
D8
D9
D10
D11 (MSB)
GND
V
DD
GND
V
REF
SENSE
V
CM
–A
IN
+A
IN
15
16
17
18
19
20
21
22
23
24
25
26
27
28
14
13
12
11
10
9
8
7
6
5
4
3
2
1
V
CC
V
CC
V
CC
24
5
3U3
NC7S04M5
J3
BNC
(J7)
(SMB)
J4
HD2X8-079
1
1
CLOCK
2
R17
51Ω
2
C7
0.1µF
12
11R1 2
100 X 15 PLCS
D0
U2, 74ACT16373DL
U1, LTC1420
C11 0.1µF
21
C9 0.1µF
21
21
12
C1 1µF
12
C3 1µF
C2 1µF
12
C10 0.1µF
12R2 2 D1
13R3 2 D2
14R4 2 D3
15R5 2 D4
16R6 2 D5
17R7 2 D6
18R8 2 D7
19R9 2 D8
110R10 2 D9
111R11 2 D10
112R12 2 D11
113R21 2
114R13 2 OF
115
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
16
R14 2 CLK
D11
2
3
4
5
1420 F14
1
2
R20
0Ω
12
12
JP1
JP2
213
JP7
JP3
12
12
12
JP4
JP5
JP6
1
R19
0Ω
2
1
R18
20Ω
2
C6
470pF
21
C4 1µF
21
C5 1µF
E7
D1
MBR0520LT1
1 GAIN
E5
1
V
SS
E4
1
V
DD
E3
1
OV
DD
E2
1
OGND
21
C8 0.1µF
21
C12 1µF
E1
1
V
CC
V
CC
Figure 14. LTC1420 Demo Board Schematic
APPLICATIONS INFORMATION
WUU
U