EMI There are two sections here: one for a [Component] and one for a [Model]. This section describes the structure of the EMI parameters under a top-level [Component] keyword. It is used to describe the EMI parameters associated with a [Component]. The parameters be surrounded by the [Begin EMI Component] and [End EMI Component] keywords. The following keywords are defined: [Begin EMI Component] [End EMI Component] [Pin EMI] [Pin Domain EMI] The following subparameters are defined: Domain Cpd C_Heatsink_gnd C_Heatsink_float [Begin EMI Component] Keyword: No Marks the beginning of the Component EMI parameters. Description: Domain, Cpd, C_Heatsink_gnd, C_Heatsink_float Sub-Params: Domain indicates whether the component is digital, analog, or part digital part analog. Analog circuits are more susceptible to low-level noise. Analog circuits operate at very low signal levels (mV or uV) and can contain high gain amplifiers. In contrast, digital circuits operate at relatively large signal levels (compared to analog circuits). The syntax for Domain is: Domain Domain_value Where Domain_value is an enumerated argument, and is one of: Digital, Analog, Digital_analog This subparameter is optional. If not entered, the default is Digital. Cpd is the power dissipation capacitance parameter. Cpd (Power Dissipation Capacitance) is the internal parasitic capacitance (e.g., gate-to-source and gate-to-drain capacitance) plus the equivalent capacitance associated with the through currents when both transistors (n-channel and are momentarily conducting. Cpd is typically for CMOS devices, and helps provide a more accurate estimation of the power bus current, and therefore the noise voltage on the power bus. If the high frequency noise on the power bus (due to switching of digital circuits) is known, then the radiation can be calculated.
EMI There are two sections here: one for a [Component] and one for a [Model]. This section describes the structure of the EMI parameters under a top-level [Component] keyword. It is used to describe the EMI parameters associated with a [Component]. The parameters be surrounded by the [Begin EMI Component] and [End EMI Component] keywords. The following keywords are defined: [Begin EMI Component] [End EMI Component] [Pin EMI] [Pin Domain EMI] The following subparameters are defined: Domain Cpd C_Heatsink_gnd C_Heatsink_float Keyword: [Begin EMI Component] No Description: Marks the beginning of the Component EMI parameters. Sub-Params: Domain, Cpd, C_Heatsink_gnd, C_Heatsink_float Domain indicates whether the component is digital, analog, or part digital part analog. Analog circuits are more susceptible to low-level noise. Analog circuits operate at very low signal levels (mV or uV) and can contain high gain amplifiers. In contrast, digital circuits operate at relatively large signal levels (compared to analog circuits). The syntax for Domain is: Domain Domain_value Where Domain_value is an enumerated argument, and is one of: Digital, Analog, Digital_analog This subparameter is optional. If not entered, the default is Digital. Cpd is the power dissipation capacitance parameter. Cpd (Power Dissipation Capacitance) is the internal parasitic capacitance (e.g., gate-to-source and gate-to-drain capacitance) plus the equivalent capacitance associated with the through currents when both transistors (n-channel and are momentarily conducting. Cpd is typically for CMOS devices, and helps provide a more accurate estimation of the power bus current, and therefore the noise voltage on the power bus. If the high frequency noise on the power bus (due to switching of digital circuits) is known, then the radiation can be calculated.
IBIS-5.1-draft-v130.docx