V
CC
JP1模式
V
DD
1
2
4
6
8
C1
0.1F
R
N1D
33
C2
2.2F
R1
1k
3
5
7
GND
1/3V
DD
2/3V
DD
R2
1k
R3
1k
C44
0.1F
74VCX245BQX
V
DD
JP2感
V
DD
3
V
CM
4
E1
EXT
REF A
EXT REF
5
6
20
V
CC
18
2
A0
B0
17
3
A1
B1
16
4
B2
A2
15
5
A3
B3
14
6
B4
A4
13
7
A5
B5
12
8
A6
B6
11
9
A7
B7
1
T / R
19
10
OE GND
J2
模拟R4
INPUT A OPT
V
DD
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
C3
T1
0.1μF ETC1-1T
5
1
V
CC
C6
12pF
C4
0.1F
V
CC
C5
0.1F
R5
24.9
2
R6
24.9
34
32
30
28
26
24
22
20
R
N3A
33
R
N4D
33
R
N4C
33
R
N4B
33
18
16
14
12
10
C16 0.1μF
8
6
R
N3D
33
R
N3C
33
R
N3B
33
应用S我FOR ATIO
U
4
2
R28
24
C43
8.2pF
228876 AI01
4
GND
V
DD
SENSEA
VCMA
模式
SHDNA
OEA
OFA
DA11
DA10
DA9
DA8
DA7
DA6
OGND
OV
DD
3
C7
0.1F
C9 1μF
C10
2.2F
C13 1μF
U1
LTC2290
C11
0.1F
R8
51
L1
珠子
C12
4.7F
6.3V
V
CMA
R9
24.9
C8
0.1F
V
DD
V
DD
C14
0.1F
R10
1k
C18 1μF
C20
2.2F
C21
0.1F
C23 1μF
GND
V
DD
SENSEB
VCMB
MUX
SHDNB
OEB
NC
NC
DB0
DB1
DB2
DB3
DB4
OGND
OV
DD
C15
0.1F
V
DD
20
V
CC
18
2
A0
B0
17
3
A1
B1
16
4
B2
A2
15
5
A3
B3
14
6
B4
A4
13
7
A5
B5
12
8
A6
B6
11
9
B7
A7
1
T / R
19
10
OE GND
74VCX245BQX
V
CC
J3
时钟
输入
C19
0.1F
U3
NC7SVU04
C17
0.1F
3201S-40G1
39
40
39
37
38
37
35
35
36
33
34
33
31
31
32
29
30
29
27
27
28
25
25
26
23
23
24
21
21
22
19
19
20
17
17
18
15
15
16
13
13
14
11
11
12
9
9
10
7
7
8
5
5
6
3
4
3
1
1
2
R
N1C
33
R
N1B
33
R
N1A
33
R
N2D
33
R
N2C
33
R
N2B
33
R
N2A
33
R11
10k
R12
10k
C24
0.1F
R13
10k
R14
49.9
V
CC
C25
0.1F
V
CC
R27
待定
R15
1k
C13
0.1F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A
INA +
A
INA-
REFHA
REFHA
REFLA
REFLA
V
DD
CLKA
CLKB
V
DD
REFLB
REFLB
REFHB
REFHB
A
INB-
A
INB +
DA5
DA4
DA3
DA2
DA1
DA0
NC
NC
OFB
DB11
DB10
DB9
DB8
DB7
DB6
DB5
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
R32
22
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
U6
NC7SVU04
V
DD
C27
0.1F
V
CC
R25
105k
U8
LT1763
R16
33
V
DD
R18
24.9
V
中巴
R20
24.9
JP3 SENSE
C31
12pF
V
DD
V
中巴
E2
EXT
REF B
C35
0.1F
EXT REF
5
6
3
4
V
CM
C37
10F
6.3V
R26
100k
1
2
V
DD
R22
24.9
C28
2.2F
V
CC
U4
NC7SV86P5X
1
A0
2
A1
3
A2
4
A3
8
V
CC
7
WP
6
SCL
5
SDA
U5
24LC025
V
DD
R31
待定
U10
NC7SV86P5X
E4
GND
E3
V
DD
3V
V
CC
C26
0.1F
R30
15
J4
类似物
R17
输入B
选择
2
C29
T2
0.1μF ETC1-1T
4
1
V
DD
C36
E5
4.7F
PWR
GND
1
8
IN
OUT
2
7
ADJ GND
3
6
GND GND
4
5
BYP SHDN
C38
0.01F
V
CC
C39
1F
5
3
U7
NC7SV86P5X
R29
51
L2
47nH
C30
18pF
C40
0.1F
C41
0.1F
L3
47nH
C32
18pF
L4
47nH
C42
8.2pF
C33
0.1F
R24
24.9
C34
0.1F
R23
51
V
中巴
U
LTC2290
R7
24.9
W
V
CMA
40
38
36
U
1
V
DD
2
19
2290fa
