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analog circuit design depends on spice software
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 >>  5Spice Professional is now available
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Spice blog (issues in using Spice)

ECN Magazine blog

power MOSFET model accuracy caution

5Spice Tutorials on YouTube < NEW!

Tutorials on Spice and Circuit Design

links to spice models and subcircuits
Spice Model/Subcircuit Download Pages

    Download Spice, Spice3 or PSpice® models (not HSpice, Spice2 or IBIS models). Please report bad links.

New 5Spice Users
recommend downloading Diodes Incorporated's Spice Model Library file to add more discrete devices to the Library (first upgrade to 5Spice v1.61 or newer to avoid problem). Download International Rectifier file for power MOSFETs.

Place these files and any others that should be linked to the Diode,  BJT(transistor), FET(all types), IGBT, SCR and TRIAC schematic symbols in Library subdirectories:
Library\Diode_BJT_FET\{name of company}

Place all other files in subdirectories:
Library\Subcircuits\{name of company}
 You may add as many subdirectories as you want.

Library Location
See main menu TOOLS > REBUILD LIBRARY to find where the Library is located on your computer.


Searching  for Models
but don't know the manufacturer?

    If looking for 2N2222,

      go to www.Google.com and search for
             2N2222 spice    or    2N2222 model

    Once you know the manufacturer, find their name in the listing below and read the notes about using their models in 5Spice. There is also a link to reach the model page of the manufacturer’s website.


Comments are for 5Spice 2.0. Earlier versions had additional issues.

Analog Devices To search for a specific model, enter the model number followed by the word “spice” in their website search box. example: enter AD797 spice. Or click on the product category you want.

ADAxxxx op amp subcircuits use non-standard node order, enter connection information in the program.

APEX  (Cirrus Logic) Spice models - Linear Amplifiers. Hybrid op amps that run on 50-300v power supplies or deliver >5 amps. These op amp subcircuits use non-standard node order, enter connection information in the program.

Central Semi discrete semiconductors of many types including TVS. many from the distant past but some newer devices.

MOSFET models: do not include the drain to source diode that all power MOSFETs have. not recommended for switching circuits or for accuracy.

CoilCraft inductors

Diodes Incorporated signal, power, zener diodes. BJT, small power MOSFETs. Model files now include former Zetex models as well.

All Models in Single File
use the link named “complete Spice Model Library .txt”. After downloading, replace the “.txt” file extension with “.mod”.

MOSFET models: the Diode Inc. MOSFET models do not include the drain to source diode that all power MOSFETs have - use the included Zetex MOSFET models instead.

Fairchild discrete devices. Click on entry in "Condition" column in device list to request model.
MOSFET models:
3 node models require 5Spice v1.60 or higher. A few require v2.02 or higher.
4-5 node models have various types of thermal modeling. Use 5Spice's rectangular subcircuit symbol in the schematic. See the Fairchild site for information on using thermal modeling. app note AN-7533 is helpful.

IGBT models: Some only work with PSpice and will not show in the 5Spice selection list.
Logic devices: HSpice models are encrypted, only HSpice can read them.

Ferrite Bead PDF file download. page 6 shows subcircuit for lossy bead, graphs on page 2. The peak impedance is about 90% of the value of R4. Let us know if you find the way to change the center frequency of the impedance curve.

General Semiconductor TransZorbs, diodes. note: most diode models are included with 5Spice. Company has been bought by Vishay.

KEMET
Download and install the KEMET Spice program to get their capacitor models. Run their program and select the capacitor you want. Move the graph cursor to the frequency you want the model to represent - you can  lock the cursor by right clicking the mouse. Then go to the menu, select "MonitorXY", then select "Model Display". Press the Output List button and save the model file to the Subcircuits area of the 5Spice Library.

Note: many file saves cause the KEMET program to show a confusing error message indicating a bad character in the name. The fix is to shorten the file name, then save.

International Rectifier MOSFETs, all models in single file

Infineon Find subcircuit libraries at bottom of individual product pages. Many models use PSpice’s .FUNC syntax which is not supported by 5Spice and other simulators.

Intersil

Linear Technology all older models in single file (August 2008)
search their web site for “spice” + name of model you are looking for to find newer models.

Maxim
The majority of Maxim op amp subcircuits use non-standard node order, enter connection information in the program.

MicroChip  op amps and MOSFET drivers

National Semiconductor (now merged into TI) individual model downloads

convenient library of National op amp models Spice44.zip, not National site so may be older.

NEC Electronics discrete semiconductors

NXP (Philips) discrete semiconductors. enter model number + “spice” in site search.
Ignore logic IC models, not 5Spice compatible.

ON Semiconductor large selection of Discrete devices and Power Control/Management ICs. Ignore the Logic model downloads, they are not Spice models.

Download the Spice3 (.SP3) or PSpice (.LIB) models. Do not use the Saber (.SIN) or Spice2 (.SP2) models.

Rohm discrete semiconductors

STMicroelectronics MOSFETs, diodes, op amps, etc.. See “Resource Category” box on left side of page. Select “Hw Model”, then select a category and find part number. Models labeled “PSpice” work, models labeled “Orcad model” appear to be encrypted.

Supertex inc. has some ancient models for small power MOSFETs like 2N7002. These models don't include the drain to source diode that all power MOSFETs have. Avoid, use the Zetex models instead.

switch-mode power supply models, book, links excellent book by C. Basso. 5Spice includes some switching demo schematics and models from his earlier 2008 book. Requires program registration to modify the model parameter values from the schematic.

switch mode application notes from a high end Spice vendor in large .PDF file

thermistor models models for standard NTC thermistors (right mouse click the link, select "save content as"). get parameter values from manufacturers' catalogs or websites.

Teccor (now LittleFuse) - lower power TRIACs, SCRs, thyristors. also varistors. Select thyristor or varisitor category to get a list of  devices. Find your device in list. Click on "Technical  Information / view more" link - a small window opens. Click on "Design Support" - if there is a model, you will see a PSpice model link. Download and unzip the file. Note: most of these devices do not have a model.

Important: the  node/pin order of TRIAC and SCR subcircuits is not standardized in Spice. Edit the schematic symbol, select the subcircuit, then press “Add Connection Information” button in the program.

Texas Instruments  download the PSpice models and the general  models, not the TINA models. If link does not work, search site for "Spice models" and select first item in the search results.

If the Zip file contains several files, only add the .LIB file to the Library. If the model file name ends in ".SUB" or ".TXT", change it to ".LIB".

Caution: Zip file names starting with SLU..., SLV..., SLIM...
the models in the model (.LIB) file are encrypted. Only PSpice can read these encrypted models. To avoid possible problems, do not add these files to the 5Spice Library. To be certain, open the .LIB file. If it starts with "ENCRYPTED_LIB", only PSpice can read it. If not, add the .LIB file to the Library. Do not add the other files.

THAT integrated circuits for audio applications

Tyco Electronics (formerly AMP) connectors. see "View Models" link in upper right corner of page.

vacuum tubes / valves tubes are 110 years old in 2014.
Do not use the MOSFET model file nemos3t.mod. In spite of its name, all its IRF and Zetex subcircuits are modified to be 4 terminal devices. They do not match a 3 terminal symbol.

Vishay  keeps buying companies that make discrete devices, so has many discrete products formerly made by others. Select product category, then look for Spice under "Related Information" heading. Use the Spice3 or I-Spice models.

Zetex discrete devices. Zetex is now a part of Diodes Incorporated - see that link.

 

MOSFET model Accuracy Caution
available power MOSFET models range from trash to sophisticated.
Spice does not have a built-in device model for a power MOSFET, so it requires a subcircuit to accurately describe one. Based on pioneering papers of 25 years ago, an accurate subcircuit requires a minimum of one diode plus two MOSFETs. Additional diodes may be used to model the power MOSFET’s voltage dependent capacitances.

An accurate alternative to model trench-gate type power MOSFETs uses one diode plus one MOSFET that uses Spice's BSIM3 MOSFET model. A BSIM3  MOSFET .model line can be identified by the parameter LEVEL=7 or LEVEL=8.

Check the subcircuit’s text to see what you have! A given vendor’s models tend to be consistent, good or bad, except where they acquired another company with models of a different quality.

 

Tutorials on Spice and Circuit Design

5Spice tutorial for total Beginners Download .PDF file that shows basic operations. Especially for beginners not familiar with schematic capture and circuit simulation programs. Written by Assistant Professor Seth Aubin for his college courses. Used with permission.

5Spice Official tutorials are on YouTube as 5SpiceOfficial
Look at the beginner tutorial above first if you are new to schematic capture and circuit simulation.

Spice blog all Spice users should read “How to Think Like Spice”. also a mishmash of advanced issues in using Spice.

eCircuit Center Use Spice to help learn circuit design - many example circuits with instruction for advanced students and professionals.
Draw the schematic in 5Spice. Use 5Spice's Linear OpAmp in place of the op amp (.SUBCKT OpAmp) in these circuits. Component values and op amp's gain and pole frequency are in list at bottom of the page or listed in the circuit file you can download.

All About Circuits electronics theory at the student level. Good for basics and areas you are not familiar with. Spice used in some sections.

The SPICE Book     by Andrei Vladimirescu
Like most Spice books, old and dated (covers Spice2, gone decades ago, plus Spice3 as “new”). Still the best for understanding the technical limits of Spice and how to avoid the resulting problems. 5Spice incorporates many of his suggestions.

 

Other Links

YouSpice: The SPICE simulation community for electronic design

About Spice some interesting links to Spice resources

Engitek directory to online technical and engineering resources

RF Avenue - RF & Microwave Resources Directory see Spice section

Spread Spectrum Scene Spice stuff, books

5Spice for economic modeling. Something completely different.

 

Spice Modeling Software

Analog Services  BJT transistors using data sheet parameters. Free.

EMWonder  S-parameter to Spice model converter

Spice Modeling Services (custom model creation)

AEi Systems

Analog Innovations

Analog & RF models

Interactive-Products  broadband frequency response in time domain model (using lossy transmission line)

Interface Technologies

Silvaco

Spice Modeling Associates

Turgeon

Spice Modeling Books

Understand the theory behind complex Spice models. For Spice fanatics and researchers, not ordinary 5Spice users.

Semiconductor Device Modeling, Massobrio & Antognetti

Modeling the Bipolar Transistor, Getreu. www.lulu.com

 

Note: PSpice is a registered trademark of Cadence Design Systems, Inc.

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