DPX4288-C [COILCRAFT]
Diplex Filters; 双工滤波器
| 型号： | DPX4288-C |
| 厂家： | 
Coilcraft lnc. |
| 描述： | Diplex Filters |
| 文件： | 总4页 (文件大小：156K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Document 282-1
For DOCSIS
Diplex Filters 1.0, 1.1, 2.0
These diplex filter modules provide both low pass and high
pass filtering in low cost units that meet the requirements
of the DOCSIS 1.0, 1.1 and 2.0 standards.They are in-
tended for two-way broadcast applications like cable mo-
dems, set-top boxes and HFC cable network equipment.
The DPX-C parts are low-profile surface mount units
that require a minimum of board space. The DPX-B are
shielded andcome with anintegratedcoaxialFconnector.
In addition to the designs shown here, Coilcraft can
custom-engineer diplexers for specific applications. For
free evaluation samples, contact Coilcraft or order them
on-line at www.coilcraft.com.
Low pass filter
High pass filter
Part
number
DOCSIS
standard
Insertion
loss
Return
loss
Insertion
loss
Return
loss
Irms1
(mA)
Passband
Passband
DPX4254-B
DPX4254-C
1.0
1.0
5 – 42 MHz
5 – 42 MHz
≤1.0 dB
≤1.5 dB
≥15 dB
≥15 dB
54 – 860 MHz
54 – 860 MHz
≤1.5 dB
≤1.5 dB
≥15 dB
≥15 dB
500
150
DPX4288-B
DPX4288-C
1.1, 2.0
1.1, 2.0
5 – 42 MHz
5 – 42 MHz
≤1.5 dB
≤1.5 dB
≥10 dB
≥10 dB
88 – 860 MHz
88 – 860 MHz
≤1.5 dB
≤1.5 dB
≥10 dB
≥10 dB
500
150
1. Average current for a 15°C temperature rise above 25°C ambient.
2. Operating temperature range 40°C to +85°C.
–
3. Electrical specifications at 25°C.
Schematic – Shielded Filters (-B)
Schematic – Surface Mount Filters (-C)
1
Diplex filter
2
4
High pass
filter
1
2
3
3
5
Low pass
filter
Diplex
filter
F connector
F connector (1)
High pass
Low pass
4, 5
Impedance: 75 ohms all ports
Low pass (3)
Ground (5)
High pass (2) Ground (4)
Impedance: 75 ohms all ports
Specifications subject to change without notice.
Please check our website for latest information. Document 282-1 Revised 01/11/08
© Coilcraft, Inc. 2007
Document 282-2
Shielded Diplex Filter – DPX4254-B
Low pass response
High pass response
0
0
20
40
60
20
40
60
80
80
100
100
1
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Return loss
Isolation
0
0
10
20
20
30
40
40
60
80
50
1
100
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Unshielded Diplex Filter – DPX4254-C
Low pass response
High pass response
0
0
20
20
40
60
40
60
80
80
100
100
1
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Return loss
Isolation
0
0
10
20
20
30
40
40
60
80
50
1
100
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Specifications subject to change without notice.
Please check our website for latest information. Document 282-2 Revised 01/11/08
© Coilcraft, Inc. 2007
Document 282-3
Shielded Diplex Filter – DPX4288-B
Low pass response
High pass response
0
0
20
40
60
20
40
60
80
80
100
100
1
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Return loss
Isolation
0
0
10
20
20
30
40
40
60
80
50
1
100
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Unshielded Diplex Filter – DPX4288-C
Low pass response
High pass response
0
0
20
20
40
60
40
60
80
80
100
100
1
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Return loss
Isolation
0
0
10
20
20
30
40
40
60
80
50
1
100
1
10
100
1000
10
100
1000
Frequency (MHz)
Frequency (MHz)
Specifications subject to change without notice.
Please check our website for latest information. Document 282-3 Revised 01/11/08
© Coilcraft, Inc. 2007
Document 282-4
Dimensions – DPX4254-B, DPX4288-B
Dimensions – DPX4254-C
A
B
A
C
D
E
B
D
F
G
F
G
I
3
5
1
2
4
K L
J
3/8-32 UNEF 2A
F connector
H
H
Recommended
Land Pattern
Packaged 32 per tray
C
E
A
B
C
D
F
max max max typ
E
F
G
H
I
J
K
L
1.065 0.560 0.215 0.155 0.050 0.300 0.400 0.700 0.120 0.070 0.305 0.545
17,05 14,22 5,46 3,94 1,27 7,62 10,16 17,78 3,05 1,78 7,75 13,84
H
G
I
J
K
J
Dimensions – DPX4288-C
L
A
B
D
C
M
E
J
J
G
N
F
F
F
F
O
H
I
3
5
1
2
4
J K
0.039 × 0.157
1,0 × 4,0
(4)
G
G
Recommended
Land Pattern
0
0.043
1,1
(4)
Packaged 32 per tray
0.196 / 4,98
0.274 / 6,96
0.039 × 0.130
1,0 × 3,3
A
B
C
D
typ
(2)
0.452 / 11,48
0.550 / 13,97
max max max
E
F
G
H
I
J
K
1.065 0.560 0.215 0.155 0.050 0.400 0.800 0.120 0.070 0.305 0.545
17,05 14,22 5,46 3,94 1,27 10,16 20,32 3,05 1,78 7,75 13,84
0.692 / 17,58
Recommended Board Layout
Packaged 25 per tray
A max B max C max
D
E
F
G
H
1.40
0.81
0.51
0.580 0.124 0.005
0.035 1.303
35,56 20,57
12,95
14,73
3,15
1,27
0,89
33,10
I
J
K
L
M
N
O
0.855 0.118
21,72 3,00
0.229
5,82
0.378 0.091 0.311
9,60 2,31 7,90
0.753
19,13
Specifications subject to change without notice.
Please check our website for latest information. Document 282-4 Revised 01/11/08
© Coilcraft, Inc. 2007
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