SPICE

Document 298
SPICE Model – 0603LS
This lumped-element (SPICE) model data simulates the
frequency-dependent behavior of Coilcraft ferrite surface
mount inductors within the frequency range shown in the
accompanying table.
The equivalent lumped element model schematic is shown
below. The element values R1, R2, C, L, k1 and k2 are
listed in the table for each component value. The value of
the frequency-dependent variable resistor RVAR1 relates to
the skin effect and is calculated from:
RVAR1 = k1 *
• k1 is shown for each value in the accompanying table.
• f is the frequency in Hz
The value of the frequency-dependent variable resistor
RVAR2 relates to core losses and is calculated from:
RVAR2 = k2 *
• k2 is shown for each value in the accompanying table.
• f is the frequency in Hz
Typically, the Self-Resonant Frequency (SRF) of the
component model will be higher than the measurement of
the component mounted on a circuit board. The parasitic
reactive elements of a circuit board or fixture will effectively
lower the circuit resonant frequency, especially for very
small inductance values. Since data sheet specifications
are based on typical production measurements, and the
SPICE models are based on de-embedded measurements as described below, the model results may be
different from the data sheet specifications.
Lumped Element Modeling Method
Measurements were made using a 50 Ohm Agilent/
HP 4291A impedance analyzer with an Agilent/HP 16193
test fixture. Calibration was performed using open/short/
load/air capacitor (phase) standards. Fixture compensation was performed using open and short standards.
The lumped element values were determined by matching
the simulation model to an average of the measurements.
This method results in a model that represents as closely
as possible the typical frequency-dependent behavior of
the component within the model frequency range.
The lumped element models were used to generate
our 2­‑port S-parameters and therefore give identical
results. The S-parameters are available on our web
site at http://www.coilcraft.com/models.cfm.
Disclaimer
The data represents de-embedded measurements, as
described below. Effects due to different customer circuit
board traces, board materials, ground planes or interactions with other components are not included and can
have a significant effect when comparing the simulation
to measurements of the inductors using typical production
verification instruments and fixtures.
Each model should only be analyzed at the input and
output ports. Individual elements of the model are not
determined by parameter measurement. The elements
are determined by the overall performance of the lumped
element model compared to the measurements taken of
the component.
Coilcraft makes every attempt to provide accurate measurement data and software, representative of our components, in a usable format. Coilcraft, however, disclaims
all warrants relating to the use of its data and software,
whether expressed or implied, including without limitation any implied warranties of merchantability or fitness
for a particular purpose. Coilcraft cannot and will not be
liable for any special, incidental, consequential, indirect or
similar damages occurring with the use of the data and/
or software.
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 298-1 Revised 04/27/16
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
Document 298
SPICE Model for Coilcraft 0603LS RF Inductors
Frequency limit
of model (MHz)
Part number
Lower Upper
R1
0603LS-47N 5
500490
0603LS-72N 5
500872
0603LS-101
5 500 1264
0603LS-121
5 500 1706
0603LS-151
5 500 2756
0603LS-181
5 500 3546
0603LS-241
5 350 4025
0603LS-271
5 300 3518
0603LS-331
5 300 3330
0603LS-391
5 300 2920
0603LS-471
5 300 1886
0603LS-561
5 300 1676
0603LS-681
5 200
893
0603LS-781
5 200 3800
0603LS-821
1 150 2740
0603LS-102
1 100 1180
0603LS-122
1 80
690
0603LS-152
1 80
242
0603LS-182
1 65
27.8
0603LS-222
1 60
33.5
0603LS-272
1 50
36.1
0603LS-332
1 37
80.4
0603LS-392
1 36
91.5
0603LS-472
1 30
76.1
0603LS-562
1 28
63.5
0603LS-782
1 25
90.4
0603LS-822
1 23
108
0603LS-223
1
30
72.6
R2
C (pF)
L (nH)
k1
k2
0.001
10.6 46.32.87E-05
5.77E-02
0.001
11.5 70.05.07E-05
1.65E-01
0.001
7.50
95.0
7.34E-051.50E-01
0.001
7.30 117
7.34E-051.52E-01
0.002
2.00 149
9.20E-051.45E-01
0.005
0.90 179
9.54E-051.60E-01
0.002
0.17 232
1.21E-042.14E-01
0.002
0.11 261
1.15E-042.17E-01
0.002
0.12 325
1.30E-042.42E-01
0.095
0.14 379
1.44E-043.72E-01
0.432
0.13 455
3.80E-053.47E-01
0.319
0.13 535
3.94E-053.94E-01
0.365
0.28 677
7.97E-055.11E-01
0.532
0.10 765
3.83E-055.35E-01
0.669
0.15 799
5.70E-056.33E-01
0.666
0.33 997
1.45E-047.88E-01
0.666
0.35 1180
8.08E-057.78E-01
0.956
1.26 1500
3.39E-059.40E-01
1.51
1.56 1760
8.42E-051.06E+00
1.10
1.73 2140
7.23E-051.31E+00
1.37
1.59 2620
5.76E-051.71E+00
1.49
2.68 3290
2.17E-051.98E+00
1.89
2.69 3810
2.33E-052.10E+00
3.14
3.49 4660
1.71E-052.59E+00
5.63
3.14 5390
1.31E-052.76E+00
3.58
3.05 7370
2.04E-054.46E+00
3.48
3.22 7801
2.04E-054.99E+00
8.81
2.4320900
3.30E-061.49E+01
US +1-847-639-6400 [email protected]
UK +44-1236-730595 [email protected]
Taiwan +886-2-2264 3646 [email protected]
China +86-21-6218 8074 [email protected]
Singapore + 65-6484 8412 [email protected]
Document 298-2 Revised 04/27/16
© Coilcraft Inc. 2016
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.