Datasheet

LTC2240-12
24
224012fd
APPLICATIONS INFORMATION
Evaluation Circuit Schematic of the LTC2240-12
A
IN
+
A
IN
+
A
IN
–
A
IN
–
REFHA REFHA REFLB REFLB REFHB REFHB REFLA REFLA
C19
0.1RF
2 1 4 3 6 5 8 7
10
9
12 11
56 55 54 53 52 51 48 47 46 45 44 43 40 39 38 37 36 35 32 31 30 29 28 27 24 23 22 21
R17
100<
R3 100<
R7 1k
R37
BLM18BB470SN1D
R38
100<
R39
100<
R40
100<
R42
100<
R43
100<
R18
100<
R19
100<
R20
100<
R21
100<
R22
100<
R28 100<
R30 100<
24
OF
+
OF
–
D11
+
D11
–
D10
+
D10
–
D9
+
D9
–
D8
+
D8
–
D7
+
D7
–
D6
+
D6
–
D5
+
D5
–
CLKOUT
+
CLKOUT
–
D4
+
D4
–
D3
+
D3
–
D2
+
D2
–
D1
+
D1
–
D0
+
D0
–
LTC2240-12
GND
GND
GND
GND
V
DD
V
DD
V
DD
V
DD
V
DD
65
64
61
16
63
62
15
14
13
C26 0.1
R
F
C25 0.1
R
F
2.5V
OV
DD
OV
DD
OV
DD
OV
DD
OGND
OGND
OGND
OGND
25
33
41
50
26
34
42
49
TP6
V
CM
ENC+ ENC– SHDN OE SENSE MODE LVDS V
CM
C20 0.1RF
C21 0.1RF C23 0.1RF
C22 0.1RF
TP1
EXT REF
TP2
GND
SHDN 3
V
DD
1
GND 5
4 OE 2 V
DD
6 GND
2.5V 1
V
CM
3
EXT REF 5
2 4 6
17 18
60
19
20 59
58 57
2.5V
2.5V
2.5V
R24 1k
J4
SENSE
1
V
DD
3
GND 5
2 4 2/3 6 1/3
J2
MODE
R6 1k R8 1k
LT1763CDE-2.5
IN IN SHDN
V
O
V
O
10 11
8
SEN
2
21
3 5 6
BYP
GND GP
GP
7
C38 0.01RF
C34
0.1RF
C36 4.7RF
J6
AUX PWR
CONNECTOR
C24 10RF
+2.5V +3.3V
3.3V TP5
GND TP4
2.5V TP3
(NO TURRET)
1 2 3
EN12 EN34 EN56 EN78 EN I
1N
I
1P
I
2N
I
2P
I
3N
I
3P
I
4N
I
4P
I
5N
I
5P
I
6N
I
6P
I
7N
I
7P
I
8N
I
8P
V
BB
O
1N
O
1P
O
2N
O
2P
O
3N
O
3P
O
4N
O
4P
O
5N
O
5P
O
6N
O
6P
O
7N
O
7P
O
8N
O
8P
V
C1
V
C2
V
C3
V
C4
V
C5
12
25
26
47
48
V
E1
V
E2
V
E3
V
E4
V
E5
1
2
23
36
37
U3 FINII08
3.3V
EN12 EN34 EN56 EN78 EN I
1N
I
1P
I
2N
I
2P
I
3N
I
3P
I
4N
I
4P
I
5N
I
5P
I
6N
I
6P
I
7N
I
7P
I
8N
I
8P
V
BB
O
1N
O
1P
O
2N
O
2P
O
3N
O
3P
O
4N
O
4P
O
5N
O
5P
O
6N
O
6P
O
7N
O
7P
O
8N
O
8P
V
C1
V
C2
V
C3
V
C4
V
C5
12
25
26
47
48
V
E1
V
E2
V
E3
V
E4
V
E5
1
2
23
36
37
U3 FINII08
3.3V
3
22 27 46 13
4 5 6 7 8 9
10 11 14 15 16 17 18 19 20 21
45 44 43 42 41 40 39 38 35 34 33 32 31 30 29 28 45 44 43 42 41 40 39 38 35 34 33 32 31 30 29 28
3
22 27 46 13
4 5 6 7 8 9
10 11 14 15 16 17 18 19 20 21
24
2 4 6 8
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54
1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53
56 58 60 62 64 66 68 70 72 74 76 78 80 82 84 86 88 90 92 94 96 98
100
55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 85 87 89 91 93 95 97 99
LVDS BUFFER BYPASS
C28 0.1RF
C29 0.1RF
3.3V
C30 0.1RF
C31 0.1RF
C32 0.1RF
C33 0.1RF
C5 0.1RF
C8 0.1RF
R16 100k
V
CC
24LC02ST
GND
4
224012 AI01
8
ARRAY
EEPROM
SCL
SDA
WP
A2 A1 A0
6 5 7 3 2 1
C27
0.1RF
R46
4990<
R29 4990<
2.5V
R26
4990<
R1 49.9< R2 49.9<
R4
4.99<
R5
4.99<
J7
ENCODE
CLK
C3 0.1RF
C11
0.1RF
C4 1.8pF
R41
100<
C13
0.1RF
C14
0.1RF
C15
1RF
C16
1RF
C17
2.2RF
R23
100<
C12
0.1RF
C9 1.8pF
R11 49.9< R12 49.9<
R13
4.99<
R14
4.99<
R9
12.4<
R10
12.4<
C18
2.2RF
C10
0.1RF
R15 49.9<
T2
MABA-007159-000000
R27
49.9<
A
IN
C6
0.1RF
J5
SMA
C2
0.1RF
C7
0.1RF
SMA
C1
0.1RF
T1
MABA-007159-000000
VERSION DEVICE BITS SAMPLE RATE DC997B-A LTC2242-12 12 250Msps DC997B-B LTC2241-12 12 210Msps DC997B-C LTC2240-12 12 170Msps DC997B-D LTC2242-10 10 250Msps DC997B-E LTC2241-10 10 210Msps DC997B-F LTC2240-10 10 170Msps
R25 1k
U5
SJ