Document 225-1
1812LS Chip Inductors for xDSL Filters
nents. We can also provide several complete low pass
and band pass filter modules in space-saving SIP con-
figurations.
The 0.055″profilemakesthesepartsidealforlowclearance
applications. Simple construction ensures high reliability
and stability.
For free evaluation samples or more information, please
contact Coilcraft or visit www.coilcraft.com/xdsl.
Coilcraft offers a library of reference designs for various
xDSL filters using these and other surface mount compo-
Test
freq
(MHz)
SRF
min5
(MHz)
DCR
max6
(Ohms)
Inductance2
(µH)
Percent
Q
Irms7
(mA)
Part number1
tolerance3
min4
1812LS-123X_B_
1812LS-153X_B_
1812LS-183X_B_
1812LS-223X_B_
1812LS-273X_B_
12
15
18
22
27
10,5
10,5
10,5
10,5
10,5
42
42
45
45
45
2.5
2.5
2.5
2.5
2.5
55
45
37
32
27
2.0
2.5
2.8
3.2
3.6
310
290
270
260
240
1812LS-333X_B_
1812LS-393X_B_
1812LS-473X_B_
1812LS-563X_B_
1812LS-683X_B_
33
39
47
56
68
10,5
10,5
10,5
10,5
10,5
45
45
42
42
40
2.5
2.5
2.5
2.5
2.5
23
19
16
13
10
4.0
4.5
5.0
5.5
6.0
230
210
200
190
180
1812LS-823X_B_
1812LS-104X_B_
1812LS-124X_B_
1812LS-154X_B_
1812LS-184X_B_
82
100
120
150
180
10,5
10,5
10,5
10,5
10,5
40
40
33
36
36
2.5
2.5
0.79
0.79
0.79
9.0
8.5
8.5
8.5
8.0
7.0
8.0
11.5
13.0
14.2
170
150
135
125
120
1812LS-224X_B_
1812LS-274X_B_
1812LS-334X_B_
1812LS-394X_B_
1812LS-474X_B_
220
270
330
390
470
10,5
10,5
10,5
10,5
10,5
38
38
38
38
38
0.79
0.79
0.79
0.79
0.79
6.0
5.0
4.5
3.5
3.0
16.2
20.5
22.5
24.5
26.5
115
105
100
90
85
1812LS-564X_B_
1812LS-684X_B_
1812LS-824X_B_
1812LS-105X_B_
560
680
820
10,5
10,5
10,5
10,5
33
33
30
30
0.79
0.79
0.79
0.79
2.0
1.9
1.6
1.5
28.5
38.0
41.0
44.0
75
60
55
50
1000
1. Specify tolerance and packaging codes:
2. Inductance at 2.5 MHz measured using Agilent/HP 4286A and Coilcraft
SMD-A fixture with Coilcraft-provided correlation pieces. Inductance at
0.79 MHz measured using Agilent/HP 4192A and Coilcraft SMD-B test
fixture.
3. Tolerances in bold are stocked for immediate shipment.
4. Q read directly on Agilent/HP 4192A LF impedance analyzer and
Coilcraft SMD-B test fixture.
1812LS-105XJBC
Tolerance: J = 5% K = 10%
(Table shows stock tolerances in bold.)
Packaging: C = 7″ machine-ready reel. EIA-481 embossed plastic
tape (600 per full reel).
5. SRF measured using Agilent/HP 8753D network analyzer and Coilcraft
SMD-D test 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.
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 (2200 per full reel).
See Qualification Standards section for environmental and test data.
See Color Coding section for part marking data.
Specifications subject to change without notice. Document 225-1 Revised 12/18/02
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