Document 558 SPICE Model – 0805AF This lumped-element (SPICE) model data simulates the frequency-dependent behavior of Coilcraft RF inductors within the frequency range shown in the accompanying table for each individual inductor. 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 other production verification instruments and fixtures. Lumped Element Modeling Method Measurements were made using a 50 Ohm impedance analyzer. Fixture compensation was performed to remove fixture effects. No DC bias current was applied in any of the measurements. Measurements were also taken on a network analyzer over a brass ground plane with the component centered over an air gap with a width of 0.060 inch (1.524 mm), as illustrated in Figure 1. The test pads were 30 mil (50 Ohm) wide traces of tinned gold over 25 mil thick alumina, and were not included in the gap. The TRL* calibration plane is also illustrated in Figure 1. RVAR2 VAR C R2 R1 RVAR1 VAR LVAR The value of the frequency-dependent variable resistor RVAR1 is calculated from: RVAR1 = k1 * • k1 is shown for each value in the accompanying table. • f is the frequency in Hz • RVAR1 is the resistance in Ohms The value of the frequency-dependent variable resistor RVAR2 is calculated from: RVAR2 = k2 * • k2 is shown for each value in the accompanying table. • f is the frequency in Hz • RVAR2 is the resistance in Ohms The value of the frequency-dependent inductance LVAR is calculated from: LVAR = k3 − k4 * LOG (k5 * f) Pad Air gap Pad Brass ground plane • k3, k4, and k5 are shown in the accompanying table. • f is the frequency in Hz • LVAR is the inductance in µH Calibration plane Figure 1. Test Setup • LOG is the natural LOG (base e) Disclaimer The lumped element values were determined by optimizing 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 equivalent lumped element model schematic is shown below. 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 558-1 Revised 08/28/11 © Coilcraft Inc. 2012 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information. Document 558 SPICE Model for Coilcraft 0805AF RF Inductors Frequency limit of model (MHz) Part number Lower Upper R1 () 0805AF-111 0.1 3000 60 0805AF-681 0.1 2000 35 0805AF-102 0.1 900 50 0805AF-122 0.1 500 50 0805AF-152 0.1 500 30 0805AF-182 0.1 500 25 0805AF-222 0.1 300 40 0805AF-272 0.1 200 25 0805AF-332 0.1 100 40 0805AF-472 0.1 100 25 0805AF-682 0.1 100 20 0805AF-103 0.1 100 30 0805AF-153 0.1 100 25 0805AF-223 0.1 100 40 LVAR Coefficients R2 () C (pF) 0.05 0.120 0.30 0.110 0.39 0.150 0.53 0.155 0.74 0.130 0.85 0.135 0.98 1.05 1.16 1.50 1.1 1.13 1.5 1.80 1.4 2.40 2.2 3.60 3.8 3.90 6.7 1.90 k1k2 k3 k4 k5 9.50E-05 0.05 0.12 2.00E-031.20E-05 1.75E-04 0.45 0.71 1.40E-021.10E-06 3.50E-04 0.90 1.10 3.00E-023.60E-06 5.00E-06 1.05 1.27 1.80E-026.75E-06 1.20E-04 1.20 1.60 3.00E-023.40E-06 5.00E-06 1.10 2.00 4.20E-021.49E-05 5.00E-06 1.50 2.40 5.10E-027.70E-06 5.00E-04 1.60 3.00 8.40E-025.95E-06 2.00E-04 2.10 3.60 8.40E-026.25E-06 5.00E-06 2.90 4.70 7.00E-026.40E-06 5.00E-06 3.00 6.80 9.00E-021.97E-06 5.00E-06 3.5010.1 1.30E-01 1.61E-06 5.00E-06 5.7014.9 4.40E-02 4.90E-06 5.00E-0411.4 22.0 5.90E-015.72E-07 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 558-7 Revised 08/28/12 © Coilcraft Inc. 2012 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information.