ADS1148: PSpice for TI (17.4 - 2023 S009 version) After automatically updating the library, ADS1148 cannot be found in the library.

Hello, can I perform simulation using the IBIS model of ADS1148 provided by TI? Use PSpice Model Editor to convert the IBIS model to .LIB or .CIR and import it to TINA for simulation? If so, where can I download PSpice Model Editor? I don't have this software in my Cadence path.

Thank you!

Hi wenrui shang,

The ADS1148 IBIS model only simulates the behavior of the input/output buffers to investigate transmission line effects, not the full signal chain behavior

See this document for more information: https://www.ti.com/lit/an/snla046/snla046.pdf?ts=1727109910999&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fen-us%252Fdocs%252Funiversalsearch.tsp%253FlangPref%253Den-US%2526nr%253D10955%2526searchTerm%253Dibis+model

What would you do with a model that could not be achieved - with better, more accurate results - using an EVM? I ask because we get these requests from time to time and it is still not clear to me how an ADC model helps. The SAR ADC models are generally only simulating the settling time on the VREF pins and ADC input pins, which is not very relevant for low speed delta-sigma ADCs such as ADS1148

-Bryan

Hello,
I need to use ADS1148 and DAC7714 on my circuit board, so I want to first verify through simulation whether my peripheral circuit meets my design requirements (including controlling the switching of the voltage and current inputs of the ADS1148 and DAC7714 components through single-chip microcomputer programming, whether the input and output meet our usage standards, etc.). TI only provides IBIS models for these two components, so I would like to ask if there is another way to meet my simulation needs. Can IBIS models in PSpice for TI, multisim, TINA or other simulation software meet my simulation needs?
In addition, the IBIS model you mentioned is only used to simulate the behaviour of input/output buffers and to study transmission line effects, not the behaviour of the entire signal chain. Can you give me an example of line effects and signal chain behaviour? I really don't understand IBIS models in depth, so thank you!

Hi wenrui shang,

My recommendation is to get an EVM and try out the circuit you are intending to build. We don't have spice models so actually testing your circuit with hardware is the only option at this point.

-Bryan

Thank you for your answer. I will try to use the EVM to test.
In addition, I would like to know in what software and for what tests the IBIS model provided by TI is generally used. I have not actually used the IBIS model before, and I have only searched online for some related information. I am not very clear about it. After reading the relevant information this time, I still don't quite understand it. I am curious and look forward to your answer, thank you!