Datasheet

LTC2228/LTC2227/LTC2226
24
222876fb
APPLICATIONS INFORMATION
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 12pF
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
222876 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
24.9Ω
R6
24.9Ω
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
LTC2228/LTC2227/
LTC2226
OE
D11
GND
D0
NC NC
D1 D2 D3 D5 D4 D6 D8 D9
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