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TINA/Spice: TINA TI Spice

Vivek Gujari
Prodigy 185 points
Other Parts Discussed in Thread: TINA-TI, ADC161S626

Tool/software: TINA-TI or Spice Models

Hello everyone,

My project is to design the front end design of a data acquisition system and I am in the very beginning stage of the design.

I am right now working on the ADC interface design. I wanted to know if its possible to run simulation of an ADC model with Tina TI Spice software?

For example, I have designed the front end signal conditioning circuit for a 200 MSPS ADC. So is it possible to run the simulation on the whole design (front end + ADC) and to check if the ADC is

giving digital outputs for analog signal?

Please let me know. Thank you!

  • 0
    TI__Mastermind 39210 points
    Hi Vivek,

    You should be able to use TINA-TI to do some simulations. The ADC models that we have only model the front end of the ADC (not the actual conversion process) to simulate the interaction with the other front end components to check things like stability.

    Check out this example: www.ti.com/.../toolssoftware

    You can also find all available TINA-TI models using the link below. Use the search box after opening up the page to narrow down your results (I used "ADC TINA 200" as my search enter to get to the product above).
  • 0
    TI__Mastermind 33250 points

    Vivek,

    Most A/D models support the analog input behavior of the device so a user can optimize their signal conditioning and driver circuitry for the A/D. 
    In other words. most A/D models act as a realistic load for the analog A/D drivers.

    If a model provides an output at all, it is usually a quantized analog version of the continuous analog input.

    There are a few exceptions. TINA-TI does have a built-in model of the ADC161S626, a 250kHz low-power converter that includes digital outputs.

    However, for the most part, the A/D models are really analog-oriented models, and don't support digital outputs.\

    Please let me know if you have any questions.

    Thanks,
    John

  • 0 in reply to John Miller - Sensing
    Prodigy 185 points
    Hi John and Nikhil.
    Thank you for your valuable response. So it is not possible to simulate the conversion of analog signal to digital outputs of the ADC.
    If I design the front end to an ADC and I design it in a way that the front end conditions the analog signal in a way that the ADC can sample it, how do I verify that when the same design is implemented in a PCB board, the ADC will digitize the analog signal? Do I have to interface the ADC to an FPGA so that I can record the outputs of the ADC?
    Please let me know.

    Thank you!
  • 0 in reply to Vivek Gujari
    TI__Mastermind 33250 points
    Vivek,
    Some A/D models will provide outputs that show the equivalent to the sampled input signal, just in the analog domain.
    These may be able to provide the info you need to optimize your circuit.
    Your other questions can best be answered on the E2E forums supported by product line apps engineers for A/Ds.
    They are the real experts in data acquisition and can give the best guidance on how to optimize your signal chain.
    Since your application uses a 200MSPS rate, the E2E forum for High Speed Data Converters is probably the best way to go.
    I can transfer your inquiry to that forum, or you can post a new inquiry at:
    e2e.ti.com/.../

    Please let me know what you want to do.
    Thank you.
    John
  • 0 in reply to John Miller - Sensing
    Prodigy 185 points
    Thank you for the response John!
    I will post my inquiry in the E2E forum!