<![CDATA[Intusoft Capacitor Models
Date: 2/95
Copyright © Intusoft 1995
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These models are part of the ICAP/4Windows Deluxe package which currently
includes over 10,000 models and hundreds of different part types. With
regard to the number of part types, it is the largest library available
from ANY SPICE vendor!!
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* Capacitor Subcircuit Models
* For more info see the November 1995/January 1996 Intusoft Newsletters and
* "SPICE Modeling of Capacitors" by John Prymak. Kemet Electronics Corp.
*
* IMPORTANT NOTE: These models use the key word FREQ in the B element
* expression. This capability is only available in IsSpice4 version 7.6
* or greater!!!!!!!!
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SPICE Simulation Models
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SpiceMod Modeling Software
SpiceMod is a CAE program that is used to create SPICE models from
data sheet values. SPICEMOD is particularly useful in the circuit
design phase because it allows the designer to create SPICE models
based on electrical specifications before an actual device is selected.
SpiceMod may be used to create models for diodes, Zener diodes, BJTs,
power BJTs, Darlington BJTs, JFETs, MOSFETs, power MOSFETs, IGBTs,
SCRs, and TRIACS.
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Macromodels, simulation models, or other models provided by
Intusoft, directly or indirectly, are not warranted by
Intusoft as fully representing all of the specifications and
operating characteristics of the semiconductor product to
which the model relates. Moreover, these models are
furnished on an "as is" basis without support or warranty of
any kind, either expressed or implied, regarding the use
thereof and Intusoft specifically disclaims all implied
warranties of merchantability and fitness of the models for
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infringement of patents and copyrights nor does Intusoft
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rights of others. Intusoft reserves the right to make
changes without notice to any model.
Although the use of macromodels can be a useful tool in evaluating
device performance in various applications, they cannot
model exact device performance under all conditions, nor are
they intended to replace breadboarding for final
verification.
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* Ceramic Capacitor Subcircuit Notes
* Rnom is the minimum resistance at self-resonance (Fres)
* The self resonance is widened out by the 1.5 factor (in the Log expression),
* chosen as a best fit to actual data.
* The typical capcitance variation is 10% lot-lot and for ESR 20% within
* a lot. ESR lot-lot may be greater.
* Except for NP0 and C0G caps, the bias voltage will have a
* suppressive effect on ESR and capacitance.
* Ttest is the temperature of the capacitor. It may also be set to
* "TEMP" (= to the .Options TEMP value).
* RCP and CP create a secondary or parallel resonance that represents
* a capacitance that shunts the RLC elements due mainly to the capacitance
* from the termination faces separated the length of the chip.
* Lx is used to keep the parallel resonance in check and account for the pads.
* Rx is a resistor that keeps the impedance reasonable at very high frequencies.
* Rx + Rcp should approach the imedance of free space, 377Ohms. A default value
* of 150 Ohms has been used but this value should be adjusted to
* (377- (1000*Rnom)).
* CP is dependent on the body and chip size.
* Vbias is the dc bias voltage across the capacitor. If the value is not known
* you should run an operating point analysis to find the value which can then
* be inserted back into the model.
* The FREQ variable is 0 during the transient (time) analysis. This will
* tend to make the ESR very high.
* RESR = Rnom * Temperature term * (1 + (Frequency term * Bias term))
* CNOM = Cnom * Bias term * Temperature term
**********************
* Parameters Passed into the ceramic capacitor subcircuits
*************
* TTest- ambient temperature
* Cnom - Nominal Capacitance
* Rnom - Reistive element close to ESR minimum at self-resonance
* Fres - self resonance frequency = 1/(2pi sqrt(Esl*Cnom))
* VB - DC bias applied to capacitor
* Vnom - the voltage at which the capacitance has declined by -20%
* CP - parallel resonance frequency = 1/(2pi sqrt(Esl*CP))
* Esl - Effective series inductance
************
* Parameters Passed into the tantulum capacitor subcircuits
*************
* Temp - ambient temperature
* Cnom - Nominal Capacitance
* R - Reistive element used to calculate ESR
* Fx - Value used for frequency compensation of ESR
* Esl - Effective series inductance
************
*SRC=CAPX7R;CAPX7R;Capacitors;Ceramic;Generic X7R
*SYM=CAP
.SUBCKT CAPX7R 4 5 {TTest=27 Cnom=.1U Rnom=.067 Fres=5MEG VB=0 Vnom=30 CP=1P Esl=2n}
RP 1 5 {1000/Cnom * 5^((25-TTest)/100)} ; 1000Ohms-farad/capacitance
RESR 1 3 R = {Rnom} * {5^((25-TTest)/100)} * (1+10^(Abs(Log({Fres}/(Freq+1m)))-1.5)) * {(1-(VB*0.2/Vnom))}
CNOM 6 5 {Cnom * (1-(VB*0.2/Vnom)) * (1-((((TTest-30)/85)^2) * .12))}
RCP 1 2 {1000*Rnom} ; parallel resonant RC
CP 2 5 {CP}
LESL 3 6 {ESL} ; Esl
LX 4 1 .1nh ; External_Inductance
RX 4 1 150 ; RX + RCP ->> 377Ohms or {377 - (1000*Rnom)}
.ENDS
*************
*SRC=CAPX7R1206;CX7R1206;Capacitors;Ceramic;.22uF
*SYM=CAP
.SUBCKT CX7R1206 4 5 {TTest=27 Vbias=0} ; X7R 1206 .22uF ceramic cap model
RP 1 5 R = 4.5455G * {5^((25-TTest)/100)}
RESR 1 3 R = .067 * {5^((25-TTest)/100)} *
+ (1+(10^(Abs(Log(6.38MEG/(Freq+1u)))-1.5) * {(1-(Vbias*0.2/30))}))
CNOM 6 5 C = .1u * {(1-(Vbias*0.2/30))} * {1-((((TTest-30)/85)^2) * .12)}
RCP 1 2 67.0
CP 2 5 8.4p
LESL 3 6 2.83nH
LX 4 1 .1nH
.ENDS
*************
*SRC=CAPY5V;CAPY5V;Capacitors;Ceramic;Generic Y5V
*SYM=CAP
.SUBCKT CAPY5V 4 5 {TTest=27 Cnom=.1U Rnom=.067 Fres=5MEG VB=0 Vnom=30 CP=1P Esl=2n}
RP 1 5 {1000/Cnom * 5^((25-TTest)/100)} ; 1000Ohms-farad/capacitance
RESR 1 3 R = {Rnom} * {5^((25-TTest)/100)} * (1+10^(Abs(Log({Fres}/(Freq+1m)))-1.5)) * {(1-(VB*0.2/Vnom))}
CNOM 6 5 {Cnom * (1-(VB*0.2/Vnom)) * (1-((((TTest-15)/70)^2) * .8))}
RCP 1 2 {1000*Rnom} ; parallel resonant RC
CP 2 5 {CP}
LESL 3 6 {ESL} ; Esl
LX 4 1 .1nh ; Lead_Inductance
RX 4 1 150 ; RX + RCP ->> 377Ohms
.ENDS
***********
*SRC=CAPZ5U;CAPZ5U;Capacitors;Ceramic;Generic Z5U
*SYM=CAP
.SUBCKT CAPZ5U 4 5 {TTest=27 Cnom=.1U Rnom=.067 Fres=5MEG VB=0 Vnom=30 CP=1P Esl=2n}
RP 1 5 {1000/Cnom * 5^((25-TTest)/100)} ; 1000Ohms-farad/capacitance
RESR 1 3 R = {Rnom} * {5^((25-TTest)/100)} * (1+10^(Abs(Log({Fres}/(Freq+1m)))-1.5)) * {(1-(VB*0.2/Vnom))}
CNOM 6 5 {Cnom * (1-(VB*0.2/Vnom)) * (1-((((TTest-15)/70)^2) * .8))}
RCP 1 2 {1000*Rnom} ; parallel resonant RC
CP 2 5 {CP}
LESL 3 6 {ESL} ; Esl
LX 4 1 .1nh ; Lead_Inductance
RX 4 1 150 ; RX + RCP ->> 377Ohms
.ENDS
***********
*SRC=CAPNP0;CAPNP0;Capacitors;Ceramic;Generic NP0
*SYM=CAP
.SUBCKT CAPNP0 4 5 {TTest=27 Cnom=.1U Rnom=.067 Fres=5MEG VB=0 Vnom=30 CP=1P Esl=2n}
RP 1 5 {1000/Cnom * 5^((25-TTest)/100)} ; 1000Ohms-farad/capacitance
RESR 1 3 R = {Rnom} * {5^((25-TTest)/100)} * (1+10^(ABS(LOG({Fres}/(freq+1m)))-1.5)) ; no bias effects
CNOM 6 5 {Cnom * 5^((25-TTest)/100)} ; no bias effects
RCP 1 2 {1000*Rnom} ; parallel resonant RC
CP 2 5 {CP}
LESL 3 6 {ESL} ; Esl
LX 4 1 .1nh ; Lead_Inductance
RX 4 1 150 ; RX + RCP ->> 377Ohms
.ENDS
************
*SRC=CAPC0G;CAPC0G;Capacitors;Ceramic;Generic C0G
*SYM=CAP
.SUBCKT CAPC0G 4 5 {TTest=27 Cnom=.1U Rnom=.067 Fres=5MEG VB=0 Vnom=30 CP=1P Esl=2n}
RP 1 5 {1000/Cnom * 5^((25-TTest)/100)} ; 1000Ohms-farad/capacitance
RESR 1 3 R = {Rnom} * {3^((25-TTest)/100)} * (1+10^(ABS(LOG({Fres}/(freq+1m)))-1.5)) ; no bias effects
CNOM 6 5 {Cnom} ; no bias or temperature effects
RCP 1 2 {1000*Rnom} ; parallel resonant RC
CP 2 5 {CP}
LESL 3 6 {ESL} ; Esl
LX 4 1 .1nh ; Lead_Inductance
RX 4 1 150 ; RX + RCP ->> 377Ohms
.ENDS
************
*SRC=CAPTANT;CAPTANT;Capacitors;Tantulum;Generic
*SYM=CAPTANT
.SUBCKT CAPTANT 1 8 {Esl=1n R=.06 Fx=3 Cnom=1u Temp=25} ; Tantulum
RP 1 8 {1000/Cnom} ; =1000ohm-farad/Cap (in farads)
CP 1 9 {100 * Cnom*1.03226} ; 100*Cn
RCP 8 9 {R * 1K} ; typical parallel resonant RC, 1000 * Rnom
LESL 1 2 {Esl} ; typical effective series inductance
RS 2 3 R={R * 4^((25-Temp)/100)} + {R * 4^((25-Temp)/100)} *
+ (10^({Fx} - Abs(log(Freq))) + 10^(Abs(log(Freq))-7))
* Esr = Rt + Rt * (10^(Fx - Abs(log(Freq))) + 10^(Abs(log(Freq))-7))
C1 3 8 {Cnom*1.03226/32} ; Cn/32
RC1 3 4 {R * 4^((25-Temp)/100)}
C2 4 8 {Cnom*1.03226/16} ; Cn/16
RC2 4 5 {R * 4^((25-Temp)/100)}
C3 5 8 {Cnom*1.03226/8} ; Cn/8
RC3 5 6 {R * 4^((25-Temp)/100)}
C4 6 8 {Cnom*1.03226/4} ; Cn/4
RC4 6 7 {R * 4^((25-Temp)/100)}
C5 7 8 {Cnom*1.03226/2} ; Cn/2
.ENDS
***********
*SRC=T491D476M010;T491476;Capacitors;Tantulum;22uF
*SYM=CAPTANT
*T491D476M010 - 22uF tantulum capacitor model
.SUBCKT T491476 1 8 {Esl=2.5nH R=.06 Fx=3 Cnom=22uF}
RP 1 8 45.455MEG
CP 1 9 2.2710M
RCP 8 9 60.000
LESL 1 2 2.5000N
RS 2 3 R = 60M + 60M * (10^(3 - ABS(LOG(FREQ))) + 10^(ABS(LOG(FREQ))-7))
C1 3 8 709.68N
RC 3 4 60.000M
C2 4 8 1.4194U
RC 4 5 60.000M
C3 5 8 2.8387U
RC 5 6 60.000M
C4 6 8 5.6774U
RC 6 7 60.000M
C5 7 8 11.355U
.ENDS
***************
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