Document 224-1
1008LS Chip Inductors for VDSL Filters
These low cost chip inductors are ideal for use in the
bandpass and data separation filters used in VDSL
implementations. Their wirewound design and ferrite core
provide high Q factors, low DCR and high current handling.
Coilcraft offers a library of reference designs for various
xDSL filters using these and other surface mount compo-
Inductance
2
(µH)
1.2 @ 7.9 MHz
1.5 @ 7.9MHz
1.8 @ 7.9MHz
2.2 @ 7.9MHz
2.7 @ 7.9 MHz
3.3 @ 7.9MHz
3.9 @ 7.9MHz
4.7 @ 7.9MHz
5.6 @ 7.9MHz
6.8 @ 7.9MHz
8.2 @ 7.9MHz
10.0 @ 7.9MHz
Percent
tolerance
3
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
10,5
nents. We can also provide several complete low pass
and band pass filter modules in space-saving SIP con-
figurations.
For free evaluation samples or more information, please
contact Coilcraft or visit
www.coilcraft.com/xdsl.
Part number
1
1008LS-122X_B_
1008LS-152X_B_
1008LS-182X_B_
1008LS-222X_B_
1008LS-272X_B_
1008LS-332X_B_
1008LS-392X_B_
1008LS-472X_B_
1008LS-562X_B_
1008LS-682X_B_
1008LS-822X_B_
1008LS-103X_B_
Q min
4
48 @ 50 MHz
41 @ 50 MHz
39 @ 50 MHz
34 @ 50 MHz
34 @ 50 MHz
32 @ 50 MHz
32 @ 7.9 MHz
31 @ 7.9 MHz
31 @ 7.9 MHz
31 @ 7.9 MHz
23 @ 7.9 MHz
31 @ 7.9 MHz
SRF min
5
(MHz)
210
190
170
150
135
120
105
90
80
70
65
60
DCR max
6
(Ohms)
0.68
0.76
0.84
1.10
1.28
1.46
1.56
1.68
1.82
2.00
2.65
2.95
Irms
7
(mA)
650
630
600
520
490
450
420
400
380
360
330
300
1. Specify
tolerance
and
packaging
codes:
1008LS-103XJBC
Tolerance: J
= 5%
K
= 10%
(Table shows stock tolerances in bold.)
Packaging: C
= 7″ machine-ready reel. EIA-481 embossed plastic
tape (2000 parts per full reel).
B
= Less than full reel. In tape, but not machine ready.
To have a leader and trailer added ($25 charge), use
code letter C instead.
D
= 13″ machine-ready reel. EIA-481 embossed plastic tape.
Factory order only, not stocked (7500 parts per full reel).
2. Inductance measured using Coilcraft SMD-A fixture in Agilent/HP 4286A
impedance analyzer with Coilcraft-provided correlation pieces.
3. Tolerances in bold are stocked for immediate shipment.
4. Q measured using Agilent/HP 4291A with Agilent/HP 16193 test fixture.
5. SRF measured using Agilent/HP 8753D network analyzer with Coilcraft
SMD-D fixture.
6. DCR measured on Cambridge Technology Micro-ohmmeter.
7. Average current for 15°C temperature rise from 25°C.
8. Operating temperature range
−40°C
to +85°C.
9. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
For part marking data see Color Coding section.
Specifications subject to change without notice.
Document 224-1
Revised 12/18/02
© Coilcraft, Inc. 2005
Document 224-2
1008LS Series (2520)
Typical Q vs Frequency
50
1.8 µH
Typical L vs Frequency
10
8
40
3.3 µH
Inductance (uH)
2.2 µH
6.8 µH
Q Factor
30
6.8 µH
6
3.3 µH
2.2 µH
1.8 µH
20
4
10
2
0
0
1
10
100
1000
1
10
100
1000
Frequency (MHz)
Frequency (MHz)
B
overall
F
A
G
F
E
terminal
C
I
J
I
D
Terminal wraparound:
approx 0.015/0,38 both ends
H
Recommended
Land Pattern
G
H
I
J
A max B max C max
0.115
2,92
0.110
2,79
0.080
2,03
D ref
E
F
0.020 0.080 0.020 0.060 0.100 0.040 0.050
0,51
2,03
0,51
1,52
2,54
1,02
1,27
Parts/reel: 7″ 2000; 13″ 7500 Tape width: 8 mm
For packaging data see Tape and Reel Specifications section.
Specifications subject to change without notice.
Document 224-2
Revised 11/20/02
© Coilcraft, Inc. 2005
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