Document 158 SPICE Model – 0603HP This lumped-element (SPICE) model data simulates the frequency-dependent behavior of Coilcraft RF surface mount inductors from 1 MHz to the upper frequency limit shown in the accompanying table. The equivalent lumped element model schematic is shown below. The element values R1, R2, C, and L are listed for each component value. The value of the frequency-dependent variable resistor RVAR relates to the skin effect and is calculated from: RVAR = k * • • k is shown for each value in the accompanying table. f is the frequency in Hz 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. 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 The measurements were made over a brass ground plane with each component centered over an air gap, as illustrated in Figure 1. The gap width for each size component is given in Table 1. The test pads were 30 mil Table 1. Test Gap Size 0302 0402,0403 0603 0805 1008 1206 1812 Gap Width (inch / mm) 0.017 / 0.432 0.017 / 0.432 0.026 / 0.660 0.040 / 1.016 0.060 / 1.524 0.080 / 2.032 0.120 / 3.048 (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. Pad Pad Brass ground plane Calibration plane Figure 1. Test Setup 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 up to a frequency just above the self-resonant frequency of the model. 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 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. Specifications subject to change without notice. © Coilcraft, Inc. 2009 Air gap Document 158-1 Revised 03/16/09 Document 158 SPICE Model for Coilcraft 0603HP Chip Inductors Part number R1 ⏲) (⏲ 0603HP-1N8 0603HP-2N2 0603HP-3N3 0603HP-3N6 0603HP-3N9 0603HP-4N3 0603HP-4N7 0603HP-5N1 0603HP-5N6 0603HP-6N0 0603HP-6N8 0603HP-7N2 0603HP-7N5 0603HP-8N2 0603HP-8N7 0603HP-9N1 0603HP-9N5 0603HP-10N 0603HP-11N 0603HP-12N 0603HP-15N 0603HP-16N 0603HP-18N 0603HP-22N 0603HP-23N 0603HP-24N 0603HP-27N 25 25 5 2 10 18 13 8 11 12 10 11 14 22 15 9 17 12 10 9 13 3 10 2 16 21 11 R2 ⏲) (⏲ 0.033 0.180 0.024 0.031 0.039 0.080 0.100 0.036 0.036 0.036 0.042 0.052 0.080 0.054 0.054 0.037 0.053 0.048 0.042 0.088 0.078 0.085 0.066 0.140 0.150 0.074 0.150 C (pF) L (nH) 0.014 0.014 0.047 0.041 0.060 0.054 0.051 0.041 0.038 0.061 0.061 0.067 0.074 0.034 0.037 0.053 0.048 0.074 0.061 0.064 0.066 0.068 0.064 0.058 0.068 0.061 0.063 1.80 2.20 3.30 3.60 3.90 4.30 4.70 5.10 5.60 6.00 6.80 7.20 7.50 8.20 8.70 9.10 9.50 10.0 11.0 12.0 15.0 16.0 18.0 22.0 23.0 24.0 27.0 k 6.50E-06 1.14E-05 7.62E-06 7.60E-06 8.40E-06 1.02E-05 1.39E-05 8.70E-06 9.30E-06 9.10E-06 1.13E-05 1.12E-05 1.40E-05 1.30E-05 1.35E-05 1.70E-05 1.44E-05 1.56E-05 2.24E-05 2.83E-05 2.50E-05 3.10E-05 3.66E-05 4.90E-05 4.90E-05 4.60E-05 5.63E-05 Upper limit (MHz) 25000 25000 20000 20000 14000 14000 14000 14000 14000 10000 10000 10000 10000 10000 10000 10000 10000 10000 10000 9000 9000 9000 8000 8000 8000 8000 8000 Part number R1 ⏲) (⏲ R2 ⏲) (⏲ 0603HP-30N 0603HP-33N 0603HP-36N 0603HP-39N 0603HP-43N 0603HP-47N 0603HP-51N 0603HP-56N 0603HP-68N 0603HP-72N 0603HP-75N 0603HP-82N 0603HP-91N 0603HP-R10 0603HP-R11 0603HP-R12 0603HP-R15 0603HP-R18 0603HP-R20 0603HP-R21 0603HP-R22 0603HP-R25 0603HP-R27 0603HP-R30 0603HP-R33 0603HP-R36 0603HP-R39 14 14 18 22 21 20 35 47 44 25 40 40 42 60 55 40 50 120 160 190 160 120 120 120 200 160 140 0.130 0.170 0.200 0.190 0.170 0.240 0.280 0.300 0.330 0.420 0.520 0.460 0.580 0.540 0.580 0.720 0.820 1.50 2.00 2.00 2.00 3.00 2.25 2.80 3.60 4.00 4.00 Specifications subject to change without notice. © Coilcraft, Inc. 2009 C (pF) L (nH) 0.052 0.053 0.063 0.049 0.047 0.047 0.040 0.038 0.043 0.045 0.047 0.056 0.058 0.034 0.041 0.038 0.046 0.031 0.029 0.034 0.037 0.044 0.041 0.040 0.036 0.032 0.037 30.0 33.0 36.0 39.0 43.0 47.0 51.0 56.0 68.0 72.0 75.0 82.0 91.0 100 110 120 150 180 200 210 220 250 270 300 330 360 390 k 6.10E-05 6.97E-05 7.90E-05 7.88E-05 8.32E-05 9.40E-05 1.10E-04 1.20E-04 1.32E-04 1.45E-04 1.40E-04 1.50E-04 1.60E-04 1.80E-04 2.00E-04 2.40E-04 2.20E-04 2.80E-04 3.00E-04 3.00E-04 3.30E-04 3.50E-04 3.90E-04 4.20E-04 4.70E-04 4.90E-04 5.30E-04 Upper limit (MHz) 6000 6000 6000 6000 6000 6000 6000 6000 4000 4000 4000 4000 4000 4000 3000 3000 3000 3000 2500 2500 2000 2000 2000 2000 2000 2000 2000 Document 158-24 Revised 01/30/08