OPA541: PSpice Model for Altium 18.1.9 with Current Limit

Hi Tim,

The OPA541 is a legacy product and its simulation model has a very limited list of parameters that are modeled, which as you are aware doesn't include the current limit function. The current model design is very simplistic compared to today's model designs and doesn't facilitate its inclusion. A complete ground and up redesign would be required. We are currently rebuilding most of our older op amp simulation models and the queue is set based on product demand. Unfortunately, the OPA541 is not high in the queue and is not scheduled to be rebuilt anytime soon.

Regards, Thomas
Precision Amplifiers Applications Engineering

Thank you Thomas for your frank reply.
Would inclusion of a simple state limiter in the output provide a functional analysis?

Can I bug you for one more thing?

Attempting to modify the model ....

Please provide a schematic of the pspice model posted.

OPA541 OPERATIONAL AMPLIFIER "MACROMODEL" SUBCIRCUIT

 

* CREATED USING PARTS RELEASE 4.03 ON 10/15/90 AT 14:05

 

* REV.A

 

* ------------------------------------------------------------------------

 

* | NOTICE: THE INFORMATION PROVIDED HEREIN IS BELIEVED TO BE RELIABLE;   |

 

* | HOWEVER; BURR-BROWN ASSUMES NO RESPONSIBILITY FOR INACCURACIES OR     |

 

* | OMISSIONS.  BURR-BROWN ASSUMES NO RESPONSIBILITY FOR THE USE OF THIS  |

 

* | INFORMATION, AND ALL USE OF SUCH INFORMATION SHALL BE ENTIRELY AT     |

 

* | THE USER'S OWN RISK.  NO PATENT RIGHTS OR LICENSES TO ANY OF THE      |

 

* | CIRCUITS DESCRIBED HEREIN ARE IMPLIED OR GRANTED TO ANY THIRD PARTY.  |

 

* | BURR-BROWN DOES NOT AUTHORIZE OR WARRANT ANY BURR-BROWN PRODUCT FOR   |

 

* | USE IN LIFE-SUPPORT DEVICES AND/OR SYSTEMS.                           |

 

* ------------------------------------------------------------------------

 

*

 

* CONNECTIONS:   NON-INVERTING INPUT

 

*               | INVERTING INPUT

 

*               | | POSITIVE POWER SUPPLY

 

*               | | | NEGATIVE POWER SUPPLY

 

*               | | | | OUTPUT

 

*               | | | | |

 

.SUBCKT OPA541   1 2 3 4 5

 

*

 

C1   11 12 10.71E-12

 

C2   6  7 15.00E-12

 

DC   5 53 DX

 

DE   54  5 DX

 

DLP 90 91 DX

 

DLN 92 90 DX

 

DP   4  3 DX

 

EGND 99 0 POLY(2) (3,0) (4,0) 0 .5 .5

 

FB   7 99 POLY(5) VB VC VE VLP VLN 0 2.653E9 -3E9 3E9 3E9 -3E9

 

GA   6  0 11 12 150.8E-6

 

GCM   0  6 10 99 337.6E-12

 

ISS   3 10 DC 120.0E-6

 

HLIM 90 0 VLIM 1K

 

J1   11  2 10 JX

 

J2   12  1 10 JX

 

R2   6  9 100.0E3

 

RD1   4 11 6.631E3

 

RD2   4 12 6.631E3

 

RO1   8  5 .25

 

RO2   7 99 .25

 

RP   3  4 4.000E3

 

RSS 10 99 1.667E6

 

VB   9  0 DC 0

 

VC   3 53 DC 5

 

VE   54  4 DC 5

 

VLIM 7  8 DC 0

 

VLP 91  0 DC 14.00E3

 

VLN   0 92 DC 14.00E3

 

.MODEL DX D(IS=800.0E-18)

 

.MODEL JX PJF(IS=2.000E-12 BETA=94.75E-6 VTO=-1)

 

.ENDS

Hi Tim,

I think we have here the "Bolye Macromodel and Subcircuit". Figure 92 of datasheet of TL054 shows it, for instance:

The given values are only valid for the TL054, of course!

Kai