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TINA/Spice/TL081: Eagle Simulation Problems

Eduardo Nava
Prodigy 30 points
Part Number: TL081
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

I am using ngspice simulation on Eagle to simulate a simple op-amp circuit with this model. The outputs are completely unexpected is this because the pspice model is only for AC circuits?

  • 0
    TI__Mastermind 37605 points

    Eduardo,

    Op amp models should work for AC, DC and transient simulations.

    Can you a schematic of the circuit you are trying to simulate?

    Regards,
    John

  • 0 in reply to John Miller - Sensing
    Prodigy 30 points

    Schematic above.

    Spice setlist below.

    * TL081 OPERATIONAL AMPLIFIER "MACROMODEL" SUBCIRCUIT
    * CREATED USING PARTS RELEASE 4.01 ON 06/16/89 AT 13:08
    * (REV N/A) SUPPLY VOLTAGE: +/-15V
    * CONNECTIONS: NON-INVERTING INPUT
    * | INVERTING INPUT
    * | | POSITIVE POWER SUPPLY
    * | | | NEGATIVE POWER SUPPLY
    * | | | | OUTPUT
    * | | | | |
    .SUBCKT TL081 1 2 3 4 5 6 7
    *
    C1 11 12 3.498E-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 4.715E6 -5E6 5E6 5E6 -5E6
    GA 6 0 11 12 282.8E-6
    GCM 0 6 10 99 8.942E-9
    ISS 3 10 DC 195.0E-6
    HLIM 90 0 VLIM 1K
    J1 11 2 10 JX
    J2 12 1 10 JX
    R2 6 9 100.0E3
    RD1 4 11 3.536E3
    RD2 4 12 3.536E3
    RO1 8 5 150
    RO2 7 99 150
    RP 3 4 2.143E3
    RSS 10 99 1.026E6
    VB 9 0 DC 0
    VC 3 53 DC 2.200
    VE 54 4 DC 2.200
    VLIM 7 8 DC 0
    VLP 91 0 DC 25
    VLN 0 92 DC 25
    .MODEL DX D(IS=800.0E-18)
    .MODEL JX PJF(IS=15.00E-12 BETA=270.1E-6 VTO=-1)
    .ENDS

     


  • 0 in reply to Eduardo Nava
    TI__Mastermind 37605 points
    Thank you Eduardo.
    I got a message that you clicked the "Resolved" button.
    Is your problem resolved or do you still have questions?
    Regards,
    John
  • 0 in reply to John Miller - Sensing
    Prodigy 30 points

    I got it working. Thanks John for the quick replies.

  • 0 in reply to Eduardo Nava
    Prodigy 10 points

    I saw that you were able to figure out how to make this TL081 device simulate. and I was wondering how you did so because I having trouble simulating it in eagle as well?