Part Editor Panel: SPICE Tab

The SPICE tab in the Part Editor panel allows you to add SPICE properties and map pin assignments between symbols and SPICE models, at the part level. This improves efficiency by allowing you to add parts in eCADSTAR Schematic Editor that have SPICE values already assigned. All SPICE properties are displayed that are in eCADSTAR Schematic Editor. Map the symbol pins to SPICE pins in the SPICE Pin Mapping table.

• The SPICE Controller Manager controls the settings for SPICE simulation.
• Specify SPICE models in the Application Settings dialog, Include file box, in eCADSTAR Schematic Editor.

The SPICE values that you set are displayed, by default, when you add the part in eCADSTAR Schematic Editor. However, they can be overridden if required. To display the SPICE tab, select a part in eCADSTAR Library Editor, and then click Home > Edit > Part on the ribbon. In the Part Editor panel, select the SPICE tab.

SPICE Part Attributes Table

Allows you to specify the SPICE attributes that are used in LTspice simulation for parts. The specified values are displayed in the relevant SPICE columns in the Library Editor Panel: Parts Tab. You can also specify SPICE values in the Library Editor Panel: Parts Tab. See Banned Characters.pdf for the characters that are prohibited for these values. The Symbol Settings dialog allows you to specify whether the SPICE attributes are displayed on the canvas in eCADSTAR Schematic Editor when you add a part associated with the relevant symbol.

 

 

Item		Description
Name		Lists the name of the spice attribute that can be assigned to a part.
	<Filter>	Allows you to enter a value to filter the relevant column. See: Filtering Displayed Values in eCADSTAR Tables.
	SPICE Element Name	Overrides the Reference Designator property. In the SPICE circuit, the prefix of this value represents a specific SPICE element. For example, "IC1" (prefix "I") represents a current source in SPICE.  To represent a subcircuit, change it to "XIC1" (prefix "X"). You can also specify a prefix using the SPICE Element Header attribute. For more information, see Understanding SPICE Controller, Simulation Properties for Components and Pins.
	SPICE Simulation Value	Allows you to specify the electrical characteristics of a passive device. For resistors, capacitors and coils, set values for resistance, capacitance and inductance, respectively. The value that you specify overrides the "Value" property for the device.
	SPICE Model Name	This is a dedicated LTspice property which defines the electrical characteristics of active elements. It provides the device model name that is used for analyzing active elements such as transistors or various types of IC. To be used in the analog unit, you must add the device model as an include file in the Schematic Editor: Application Settings dialog.
	SPICE Element Header	Adds a prefix to the Reference Designator property. In the SPICE circuit, the prefix represents a specific SPICE element. For example, "IC1" (prefix "I") represents a current source in SPICE. See Understanding SPICE Controller, Simulation Properties for Components and Pins.
	SPICE Substrate Connection Mode	For BJT, JFET, or MOSFET devices, this specifies the net to connect to a substrate pin. Set the net name to specify a substrate (bulk) connection target. You cannot set it for a device model in subcircuit (.SUBCKT) format, even if the device type is BJT, JFET, or MOSFET.
	SPICE Parameter1 - SPICE Parameter10	Allow you to specify additional parameters, such as a temperature dependence for a resistor. These parameters are dependent on the device type. For example, the temperature coefficient for passive devices (up to the second order) is enabled. For active devices, physical information for semiconductors is enabled. The items that are enabled depend on the SPICE type or version. Many of these parameters can be omitted. For more information, see Understanding SPICE Controller, Simulation Properties for Components and Pins.
Value		Specify a value for the associated spice attribute.
	<Filter>	Allows you to enter a value to filter the relevant column. See: Filtering Displayed Values in eCADSTAR Tables.

SPICE Pin Mapping Table

Allows you to specify the pin in the SPICE model that is mapped to each pin on the part. All fields in this table are read-only except SPICE Pin. You can temporarily change the column width by dragging the vertical border of each column.

Value	Description
<Filter>	Allows you to enter a value to filter the relevant column. See: Filtering Displayed Values in eCADSTAR Tables.
SPICE Pin	Specify the pin in the SPICE model that is mapped to the relevant pin on the part. Enter a positive value between 0 and 32767. Note If you make a change in the Pin Assignment table on the Part Editor Panel: Detail Tab tab, then the SPICE pin mapping may become invalid as this value is not automatically updated.
Symbol Pin	Displays the symbol pin that is set in the Part Editor Panel: Detail tab, Symbol Pin column.
Gate Label	Displays the gate label that is set in the Part Editor Panel: Detail tab, Gate Label column.
Type	Displays the type of pin that is set in the Part Editor Panel: Detail tab, Type column.
Footprint Pin	Displays the footprint pin that is set in the Part Editor Panel: Detail tab, Footprint Pin column.
Label	Displays the unique label for the pin on the part. This is set in the Part Editor Panel: Detail tab, Label column.
Circuit Label	Displays the label for the pin assignment of the relevant pin. This is set in the Part Editor Panel: Detail tab, Circuit Label column.