Spice models - Electronic Circuits Projects Diagrams Free

ljcox · 1st February 2006, 10:14 PM

Does anyone know where I can obtain a SPICE model for the CA3131 or CA3140 op amps?

I have looked at the Intersil site, but I cannot find a SPICE model for these on it. They have data sheets for them but no SPICE models for them, even though they do have models for other ICs in their range.

Any advice will be appreciated

audioguru · 2nd February 2006, 12:40 AM

Hi Len,
They are older than computers. Why not use a modern opamp that has all the newest info? Modern opamps work a lot better and cost less than those old ones anyway.

Russlk · 2nd February 2006, 12:48 AM

I searched the Intersil site but did not find CA3131. Found CA3130, is that similar? What kind of model do you need? An AC model (linear) or a transient model with common mode and I/O limitations? With a data sheet, I should be able to generate a SPICE model.

Roff · 2nd February 2006, 02:19 AM

There's a resource that sometimes works: Search Google Groups. Below are the results of searching for "ca3140 spice".

Code:

*$ model description: "awbca3140" 
*a Device model created by analog_uprev for ca3140 on Thu Mar  1 
18:48:14 IST 2001 

.subckt awbca3140   1 36 15 20 12 
*START OF DECK 
*     +IN -IN OUT +VSS -VSS 
*NODE: 1   36  15  20   12 
*------INPUT STAGE------- 
VOSBAL  7  29  3.00000000E-03 
EU1     8  1 20 12 0.0001 
EU2     8  7  5 12 -1 
RB1     12 10 1  TC= 1.991040E-03 (-1.244400E-04) 
IB4     10 12 1.000000E-06 
RB3     12  5 8743.17  TC= 1.60000000E-03 (0.00000000E+00) 
IB3     12  5 5.718750E-07 
G1      12  1 10  12 1.025000E-05 
G2      12 36 10  12 9.750000E-06 
RDM    36 29 1.500000E+12 
RCM    31 13 1.500000E+12 
CDM    36 29 4.000000E-12 
G5     31 13 36 31 6.66667E-13 
G6     31 13  1 31 6.66667E-13 
*------INTERMEDIATE  STAGE------- 
GDM    31 16 29 36 1 
GCM    31 16 13 31 -1.58113883E-05 
R1     31 16 3.16358380E+02 
C1     31 16 6.45457E-11 
VCP    23 31 100 
VCM    24 31 -100 
DD1    16 23 MD2 
.MODEL MD2 D XTI=1.000000P 
* SPECTRE: + IMAX=1000 
DD2    24 16 MD2 
G3     31  6 16 31 -1.07249255E-06 
R2     31  6 100000 
C2     11  6 1.2E-11 
RP1    31 20 3750 
RP2    31 12 3750 
*------OUTPUT  STAGE------- 
G4     31 11 6 31 -5.10867719E+01 
ROUT   31 11 60 
DD3    11  9 MD3 
.MODEL MD3 D IS=10.0F XTI=1.0P N= 3.612647E-01 
* SPECTRE: + IMAX=1000 
DD4     9 11 MD4 
.MODEL MD4 D IS=10.0F XTI=1.0P N= 8.028126E-01 
* SPECTRE: + IMAX=1000 
EU6     9 31 2 31 1 
RO1    11 26 20 
FF1    31 28 VFF1  1 
VFF1   26 2  0.0 
FF2    31 20 VFF2  -1 
VFF2   33 31 0.0 
FF3    12 31 VFF3  -1 
VFF3   31 27 0.0 
DD8    27 28 MID 
DD7    28 33 MID 
.MODEL MID D XTI=1.000000F N=1 IS=10.000000F 
* SPECTRE: + IMAX=1000 
VP     20 22 -29.2613 
VM     21 12 -29.3113 
DD5    25 22 MID 
DD6    21 17 MID 
VP1    20 30 2.7501 
VM1    32 12 .859456 
DD9     2 30 MD9 
DD10   32 15 MD9 
.MODEL MD9 D XTI=1.000000F N=1 IS=10.000000F 
* SPECTRE: + IMAX=1000 
HH1 25 2 POLY(2) VIC2 VIC1 0 1960 0 1540 0 0 0 0 0 0 
HH2 2 17 POLY(2) VIC3 VIC1 0 -1960 0 -1540 0 0 0 0 0 0 
VIC1   37 3 0.0 
VIC2   2 14 0.0 
VIC3   14 15 0.0 
VPP   37 0 1 
RPP   3 0 100.0K 
RO3  15 20 200.0MEG 
RO2  15 12 200.0MEG 
.ends 
*$ end model description: "awbca3140" 
* 
* 
*$ model description: "awbca3140a" 
*a Device model created by analog_uprev for ca3140a on Thu Mar  1 
18:48:14 IST 2001 


.subckt awbca3140a   1 36 15 20 12 
*START OF DECK 
*     +IN -IN OUT +VSS -VSS 
*NODE: 1   36  15  20   12 
*------INPUT STAGE------- 
VOSBAL  7  29  3.00000000E-03 
EU1     8  1 20 12 0.0001 
EU2     8  7  5 12 -1 
RB1     12 10 1  TC= 1.991040E-03 (-1.244400E-04) 
IB4     10 12 1.000000E-06 
RB3     12  5 8743.17  TC= 3.00000000E-03 (0.00000000E+00) 
IB3     12  5 2.287500E-07 
G1      12  1 10  12 1.025000E-05 
G2      12 36 10  12 9.750000E-06 
RDM    36 29 1.500000E+12 
RCM    31 13 1.500000E+12 
CDM    36 29 4.000000E-12 
G5     31 13 36 31 6.66667E-13 
G6     31 13  1 31 6.66667E-13 
*------INTERMEDIATE  STAGE------- 
GDM    31 16 29 36 1 
GCM    31 16 13 31 -1.58113883E-05 
R1     31 16 3.16358380E+02 
C1     31 16 6.45457E-11 
VCP    23 31 100 
VCM    24 31 -100 
DD1    16 23 MD2 
.MODEL MD2 D XTI=1.000000P 
* SPECTRE: + IMAX=1000 
DD2    24 16 MD2 
G3     31  6 16 31 -1.07249255E-06 
R2     31  6 100000 
C2     11  6 1.2E-11 
RP1    31 20 3750 
RP2    31 12 3750 
*------OUTPUT  STAGE------- 
G4     31 11 6 31 -5.10867719E+01 
ROUT   31 11 60 
DD3    11  9 MD3 
.MODEL MD3 D IS=10.0F XTI=1.0P N= 3.612647E-01 
* SPECTRE: + IMAX=1000 
DD4     9 11 MD4 
.MODEL MD4 D IS=10.0F XTI=1.0P N= 8.028126E-01 
* SPECTRE: + IMAX=1000 
EU6     9 31 2 31 1 
RO1    11 26 20 
FF1    31 28 VFF1  1 
VFF1   26 2  0.0 
FF2    31 20 VFF2  -1 
VFF2   33 31 0.0 
FF3    12 31 VFF3  -1 
VFF3   31 27 0.0 
DD8    27 28 MID 
DD7    28 33 MID 
.MODEL MID D XTI=1.000000F N=1 IS=10.000000F 
* SPECTRE: + IMAX=1000 
VP     20 22 -29.2613 
VM     21 12 -29.3113 
DD5    25 22 MID 
DD6    21 17 MID 
VP1    20 30 2.7501 
VM1    32 12 .859456 
DD9     2 30 MD9 
DD10   32 15 MD9 
.MODEL MD9 D XTI=1.000000F N=1 IS=10.000000F 
* SPECTRE: + IMAX=1000 
HH1 25 2 POLY(2) VIC2 VIC1 0 1960 0 1540 0 0 0 0 0 0 
HH2 2 17 POLY(2) VIC3 VIC1 0 -1960 0 -1540 0 0 0 0 0 0 
VIC1   37 3 0.0 
VIC2   2 14 0.0 
VIC3   14 15 0.0 
VPP   37 0 1 
RPP   3 0 100.0K 
RO3  15 20 200.0MEG 
RO2  15 12 200.0MEG 
.ends 
*$ end model description: "awbca3140a"

ljcox · 2nd February 2006, 08:47 AM

Thanks for the responses. I'll take Audio's advice and look for a more modern IC. I prefer to buy from the local electronics shops, but they only have a limited range.

If all else fails I'll have to order from RS Components. This requires a train and bus trip.

audioguru · 2nd February 2006, 03:12 PM

Hi Len,
Farnell are worldwide (click on your country's flag) and carry millions of the latest electronic parts. They ship by courier or by snail-mail.

I have recommended to others who are Down-Under to avoid buying stuff from Dick Smith Surplus Electronics (and Used Car Parts?) store. :lol:

ljcox · 2nd February 2006, 09:28 PM

Quote:

Originally Posted by audioguru

Hi Len,
Farnell are worldwide (click on your country's flag) and carry millions of the latest electronic parts. They ship by courier or by snail-mail.

I have recommended to others who are Down-Under to avoid buying stuff from Dick Smith Surplus Electronics (and Used Car Parts?) store. :lol:

I rarely go to Dick Smith. I use Semtronics who sell to the trade and are reasonably priced, but don't have as much range as RS or Farnell.

Farnell are located in Sydney so the delivery charge is likely to be more than the cost of the item.

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1st February 2006, 10:14 PM	(permalink)
ljcox	Spice models Does anyone know where I can obtain a SPICE model for the CA3131 or CA3140 op amps? I have looked at the Intersil site, but I cannot find a SPICE model for these on it. They have data sheets for them but no SPICE models for them, even though they do have models for other ICs in their range. Any advice will be appreciated __________________ Len

2nd February 2006, 12:40 AM	(permalink)
audioguru	Hi Len, They are older than computers. Why not use a modern opamp that has all the newest info? Modern opamps work a lot better and cost less than those old ones anyway. __________________ Uncle $crooge

2nd February 2006, 12:48 AM	(permalink)
Russlk	I searched the Intersil site but did not find CA3131. Found CA3130, is that similar? What kind of model do you need? An AC model (linear) or a transient model with common mode and I/O limitations? With a data sheet, I should be able to generate a SPICE model. __________________ see my website: www.geocities.com/russlk

2nd February 2006, 08:47 AM	(permalink)
ljcox	Thanks for the responses. I'll take Audio's advice and look for a more modern IC. I prefer to buy from the local electronics shops, but they only have a limited range. If all else fails I'll have to order from RS Components. This requires a train and bus trip. __________________ Len

2nd February 2006, 03:12 PM	(permalink)
audioguru	Hi Len, Farnell are worldwide (click on your country's flag) and carry millions of the latest electronic parts. They ship by courier or by snail-mail. I have recommended to others who are Down-Under to avoid buying stuff from Dick Smith Surplus Electronics (and Used Car Parts?) store. :lol: __________________ Uncle $crooge