Datasheet

LTC2255/LTC2254
20
22554fa
APPLICATIO S I FOR ATIO
WUUU
1
2
C8
0.1µF
C11
0.1µF
3
4
5
V
DD
7
V
DD
V
DD
GND
9
32
V
CM
31
30
29
33
JP2
OE
10
11
8
C7
2.2µF
C6
1µF
C9
1µF
C4
0.1µF
C2
8.2pF
V
DD
V
DD
V
DD
GND
JP1
SHDN
C15
2.2µF
C16
0.1µF
C18
0.1µF
C25
4.7µF
E2
V
DD
3V
E4
PWR
GND
V
DD
V
CC
22554 TA02
C17 0.1µF
C20
0.1µF
C19
0.1µF
C14
0.1µF
R10
33Ω
E1
EXT REF
R14
1k
R15
1k
R16
1k
R7
1k
R8
49.9Ω
R3
24.9Ω
R2
12.4Ω
R6
12.4Ω
R1
OPT
R4
24.9Ω
R5
50Ω
T1
ETC1-1T
C1
0.1µF
C3
0.1µF
J3
CLOCK
INPUT
NC7SVU04
NC7SVU04
C13
0.1µF
C10
0.1µF
C5
4.7µF
6.3V
L1
BEAD
V
DD
C12
0.1µF
R9
1k
J1
ANALOG
INPUT
A
IN
+
A
IN
–
REFH
REFH
6
REFL
REFL
V
DD
CLK
SHDN
V
DD
V
CM
SENSE
MODE
GND
LTC2255/LTC2254
OE
D12
D11
GND
D0
D1
D2
D3
D5
D4
D6
D8
D9
D13
OF
OV
DD
V
CC
OGND
D10
D7
26
25
12
13
14
15
17
16
18
22
23
27
28
21
20
24
19
OE1
I
0
OE2
LE1
LE2
V
CC
V
CC
V
CC
GND
GND
GND
I
1
I
2
I
4
I
3
I
5
I
7
I
8
I
12
I
11
I
10
I
13
I
14
I
15
I
9
O11
O10
I
6
V
CC
O0
GND
GND
GND
V
CC
V
CC
GND
34
45
39
42
25
48
24
1
47
46
44
43
41
40
38
37
36
35
33
32
30
29
27
26
V
CC
28
74VCX16373MTD
31
21
15
18
10
4
7
R
N1C
33Ω
2
3
5
6
8
9
11
12
13
14
16
17
19
20
22
23
GND
O1
O2
O4
O3
O5
O7
O8
O12
O13
O14
O15
O9
O6
25
23
27
29
31
33
35
37
39
21
19
15
17
13
9
7
1
3
5
2
4
11
26
24
30
28
34
32
38
40
39
37
35
33
31
29
27
25
23
21
19
17
15
13
11
9
7
5
3
1
40
3201S-40G1
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
36
A3
A2
A1
A0
SDA
WP
V
CC
1
2
3
4
8
24LC025
7
6
5
SCL
22
20
16
18
14
10
8
6
12
1
2
3
5
••
4
V
CM
12
V
DD
V
DD
34
2/3V
DD
56
1/3V
DD
78
GND
JP4 MODE
12
V
DD
34
V
CM
V
DD
V
CM
56
EXT
REF
JP3 SENSE
R
N1B
33Ω
R
N1A
33Ω
R
N2D
33Ω
R
N2C
33Ω
R
N2B
33Ω
R
N2A
33Ω
R
N3D
33Ω
R
N3C
33Ω
R
N3B
33Ω
R
N3A
33Ω
R
N4D
33Ω
R
N4B
33Ω
R
N4A
33Ω
R13
10k
R11
10k
R12
10k
R
N4C
33Ω
R
N1D
33Ω
C28
1µF
C27
0.01µF
V
CC
V
DD
NC7SV86P5X
BYP
GND
ADJ
OUT
SHDN
GND
IN
1
2
3
4
8
LT1763
7
6
5
GND
R18
100k
R17
105k
C26
10µF
6.3V
E3
GND
C21
0.1µF
C22
0.1µF
C23
0.1µF
C24
0.1µF
Evaluation Circuit Schematic of the LTC2255/LTC2254