Document 1144-1 SPICE Model These transmission line models simulate the frequencydependent behavior of Coilcraft VS series surface mount air core inductors within the frequency limits shown in the accompanying table for each individual inductor. They are based on empirical measurements using a 1-port impedance analyzer (HP4991 with a 16193A test fixture). Effects due to various circuit board traces, board materials, ground planes or interactions with other components are not included. They may have a significant effect when comparing the simulation to measurements of the individual inductors using other production verification instruments and fixtures. The model schematic, shown below, combines an ideal transmission line model with lumped elements. The individual element values k, R1, R2, C, Z0, EL, and F0 are listed in the table for each spring inductor. RVAR P1 50 Ohm C R1 TL1 Z0 EL F0 R2 P2 50 Ohm 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 of the component. xxxxVS Series Lumped Element Modeling Method The models were created by matching a simulation model as closely as possible to a 1-port measurement of a typical inductor using an impedance analyzer. The model was then used to create the final 2-port s-parameters. This method results in a model that represents as closely as possible the typical frequency-dependent behavior of the component within the specified frequency limits. Because our simulation models were used to generate our 2-port s‑parameters, they give identical results with the same number of simulation frequency points. The simulation models are available on our web site at http://www.coilcraft.com/models.cfm. Disclaimer 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. The value of the frequency-dependent variable resistor RVAR relates to the skin effect and is calculated from: RVAR = k × f •k is shown for each value in the accompanying table. •f is the frequency in Hz 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 1144-1 Revised 08/15/13 © Coilcraft Inc. 2013 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 1144-2 SPICE Model for Coilcraft xxxxVS Series Air Core Inductors Frequency limit of model (MHz) Part number Lower Upper R1 (Ohm) R2 (Ohm) C(pF) Z0 (Ohm) EL (Deg.) F0 (MHz) k 1010VS-23N 1 1200 158.00.02850.104 98.01.9723.8 1.06E-05 1010VS-46N 1 700 10.48 0.0015 1.231 187.5 1.97 22.91.62E-05 1010VS-79N 1 700 10.48 0.0020 1.281 303.5 1.97 22.92.38E-05 1010VS-111 1 420 76.28 0.0026 0.574 192.0 1.97 10.03.07E-05 1010VS-141 1 400 45.38 0.0030 0.874 258.0 1.97 10.04.44E-05 1212VS-22N 11200 11.84 0.0111 0.938 99.0 1.97 23.86.03E-06 1212VS-42N 1 700 17.60 0.0007 1.388 182.0 1.97 23.89.33E-06 1212VS-66N 1 600 16.80 0.0009 1.548 287.0 1.97 23.81.44E-05 1212VS-90N 1 520 14.40 0.0013 1.708 390.0 1.97 23.82.18E-05 1212VS-111 1 480 23.00 0.0012 1.488 490.0 1.97 23.52.87E-05 2014VS-33N 1 800 48.14 0.0007 1.308 142.0 1.97 23.87.47E-06 2014VS-66N 1 550 14.77 0.0007 3.048 270.0 1.97 23.81.29E-05 2014VS-111 1 480 7.80 0.0188 2.278 434.0 1.97 23.51.87E-05 2014VS-151 1 400 9.30 0.0015 2.578 602.0 1.97 23.52.95E-05 2014VS-201 1 330 10.60 0.0017 2.128 824.0 1.97 23.54.22E-05 2014VS-251 1 240 30.98 0.0020 1.888 420.0 1.97 10.03.80E-05 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 1144-2 Revised 08/15/13 © Coilcraft Inc. 2013 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.