KEMET NetList Files - S_Parameter
These models use the Touchstone formatting guides to create a frequency listing of magnitude (db) and phase (degrees) for the transmission and reflection measurements from a two-port network analyzer: S11, S12, S21, and S22. Because they contain an extended frequency listing, the individual files are much larger then the NetList (.ckt) files, and the number of compressed files is larger to keep these file sizes small for downloading. There is also a measurement for the Shunt and Series connection configurations..
Shown here is one file displayed in Notepad® of a 'shunt' connected device ('series' mode is selectable in KEMET Spice). There are 299 lines of data covering 6 decades of frequency (top 5 and bottom 4 are shown but rest were removed for brevity). The line impedance is 50 ohms (Zi = Zo = 50 Ohms, and this is selectable in KEMET Spice between 50 and 75 ohms).
The files are collected in groups and compressed in Zip files. The 1st group consists of the ceramic or MLCC part types "0201" of all dielectrics. The fists eight are similar in that they each contain S-Parameter file collections for only one chips size. After the first eight, the SMD four-capacitor arrays of 0612 size are collected, then the SMD chips with leadframes ("J-Type") attached. The last two collections are for the "Mil-C-PRF" military SMD capacitors (CDR0 and CDR3 series), and the DSCC 03028 and 03029 series of SMD capacitors.
Here are the
shunt configuration files for the ceramic surface-mount chip capacitors:
Most recently added are COTS versions of the tantalum polymer. These include the T540 (COTS version of T252) and the T541 (COTS version of T530).
Here is the
Here is the
Most recently added is the surface-mount film capacitors. These are divided by dielectric types: PEN, PET, PPS, and Paper. The PEN are the polyethylene naphthalate with a temperature capability from -55°C to 150°C(125° is standard). These are characterized with dielectric constant of 3.0, minimum thickness of 1.4 um, typical dissipation factor of 0.4%, and a dielectric absorption rating of 1.2%. These include part types with part number designations of GMC (boxed SMD), GMW (naked film SMD), and GPC (boxed SMD). More conventional packages are available in the LDE style with chip sizes from 1206 to 6054.
The PET are the polyester film capacitors with a temperature capability of -55°C to 125°C(100°C is standard).These are characterized with dielectric constant of 3.3, minimum thickness of 0.9 um, typical dissipation factor of 0.5%, and a dielectric absorption rating of 0.5%. These include part types with part type designations of MMC (boxed SMD) for the surface mount capacitor and MDC ("L" Lead with offset), MDK (Insertion Type Lead), and MDS ("L" Type lead with minimal offset) for the DIL surface mount packages.
The PPS are the polyethylene sulfide with a temperature capability from -55°C to 150°C(125° is standard). These are characterized with dielectric constant of 3.0, minimum thickness of 1.2 um, typical dissipation factor of 0.06%, and a dielectric absorption rating of 0.01%. These include part types with part type designations of SPC (boxed SMD), SMC (boxed SMD), and SMW (naked film SMD). More conventional packages are available in the LDB style with chip sizes from 1206 to 1812.
The metalized Paper types are limited to the single series: SMP253. These are high-voltage capacitors explicitly designed for class Y2 EMI filtering. The voltage rating for these capacitors is 250 VAC, whereas all other capacitor types have their voltage ratings expressed as VDC. There are 7 files in this compressed file.