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TINA/Spice/LPV521: TINA-TI Model, Bias Current

Genius 14400 points
Part Number: LPV521
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Hi all

Here I come with a question for the LPV521 TINA-TI Model:

Does this model reflect the Bias Current behavior over temperature ?

Best regards

Ue

  • Hello Ue,

    Yes.

    You can see this mentioned in the model header text.

    In TINA, click on the LPV521 symbol, and click "Enter Macro".

    The text after the stars (*) are the comments:

    "* MODEL FEATURES INCLUDE GAIN AND PHASE, SLEW RATE,

    * VOLTAGE NOISE WITH 1/F, CURRENT NOISE, INPUT BIAS

    * CURRENT, INPUT BIAS CURRENT CHANGE WITH TEMPERATURE,

    * INPUT OFFSET VOLTAGE, INPUT OFFSET VOLTAGE CHANGE

    * WITH TEMPERATURE, INPUT OFFSET VOLTAGE TEMPCO,

    * COMMON MODE RANGE, CMRR WITH FREQ EFFECTS, PSRR

    * WITH FREQ EFFECTS, OUTPUT SWING, OUTPUT CURRENT

    * FLOWS THROUGH THE RAILS, OUTPUT CURRENT LIMIT, IQ,

    * IQ TEMPCO, IQ CHANGE WITH COMMON MODE VOLTAGE,

    * OUTPUT IMPEDANCE, AND CAPACATIVE LOAD EFFECTS."

    Click the folder icon in the upper left to exit the macro viewer.

    As also mentioned in the text, the simulator GMIN setting must be set lower than 1E-12 (1p)  to properly model the small bias currents.

    In TINA, the settings are in the "Analysis" -> "Set Analysis Parameters" menus. Make sure GMIN is "1p".

     

  • Hi Paul

    Very good, thank you for the quick reply, thats very helpful indeed.

    Best regards

    Ue