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Original question:

TINA/Spice/BUF22821: BUF22821 IBIS model to TINA-spice conversion

Is there any way to simulate an ADC?

Darrell Rivers
Prodigy 70 points

Other Parts Discussed in Thread: ADS52J90, TINA-TI

I would really like to simulate an ADC before hardware implementation as the the digital outputs obtained will help me confirm the feasibility of my circuit. However, reading around on other threads it seems to me that it is not possible to simulate the function of an ADC. The adc models available for TINA are simply for drive circuitry and the IBIS models also donot include the funtionality of actual analog to digital conversion. Is there absolutely no way for me to simulate an ADC then?

  • 0
    TI__Guru**** 182821 points

    Hi Darrell,

    I believe the latest version of TINA (the full version from Design Soft, not TINA-TI) may have a full ADC model, but it's not going to be the 'free' option that you mentioned on the ADS52J90 post you made earlier.  Getting an accurate end-to-end ADC model is challenging, which is why you see some TINA models with only the front end sample and hold stage.  The idea behind those models is to ensure whatever your drive stage happens to be you can get the voltage on the sample/hold cap to fully settle within the acquisition window. Tina, P-Spice and others are primarily used for analog simulations.

    IBIS models on the other hand, only represent the pin capacitance/resistance/inductance of a device.  They are used for timing analysis and can't really be used in any sort of analog simulation tool.  If you are looking for a free mixed-signal simulation tool, you could try GNU Octave

  • 0 in reply to Tom Hendrick
    Prodigy 70 points

    Thanks for your answer!