DAC80004: Spice model for running simulation in virtuoso

Hi Avi,

I am not sure if we have an un-encrypted version of the TINA sim.  I will check within the team.

Thanks,
Paul

Hi Avi,

Please find the unencrypted spice model for DAC80004.

Note we have verified this model with TINA-TI and Pspice. You may encounter some syntax related errors when you are importing this model into Cadence Virtuoso. You need to correct the error, if you get the same. I am not familiar with Cadence Virtuoso syntax when you are importing models compatible with TINA and Pspice.

Regards,

AK

DAC80004.cir

Hi,

Thanks for the .CIR file. I imported the .cir file to Virtuoso in Pspice view. I have a doubt regarding the pin configuration. I have attached images of the symbol that I got using the .cir file in virtuoso and the image of the device in the data sheet. Some pins in the symbol are different from those in the datasheet. Could you help me out with this.

Hi,

Please see the symbol from TINA. SEL A to D is used for which channel is selected for outputs. That is just for simulation purpose. example below shows cap load drive test for Ch A with SEL A tied to high.

Hi Akhilesh!

Which pin is the CLK in this setup?

Hi,

Is it possible to get a synchronous model for DAC80004? or the synchronous model for some other DAC in the same series.

Regards

Avi 

Hi,

All our spice models for DAC are asynchronous, since the goal of the models is to simulate the output behavior like cap load, stability, current drive, noise etc.

One device series which has this serial clock modelled is DAC8311, but that model is encrypted

Hope you understand.

Regards,

AK

Hi,

I tried importing the .CIR file for the model that was provided to virtuoso in pspice view, and created the test bench. While simulating i am getting an error, it says that the mapping is not proper. I have attached the screenshot of the error and the lines to which the error is pointing. Kindly advise.

Hi,

Attachment is missing. If you want to attach any picture, please use the picture tool from the edit box and upload the same.

As such I am not an expert in Virtuoso, but still I can look into the error, if you post the picture.

Regards,

AK

This is the image of the pspice file and the instances to which the error is referring.

This is the image of the error.

Hi,

I don't know in which format Spectre accepts syntax. Try the below suggestion which I got from Cadence Community.

You should reference the model either via the "PSpice Files" section of the Setup->Simulation Files in ADE or by creating a pspice view and pasting the model in that way (setting the view type as "Pspice" when creating the new view, and then switching into that view using either the view list or a config). Don't just include it as normal SPICE (because it's not - there's an explicit approach for including pspice models in spectre because they have additional syntax beyond Berkeley SPICE).

Importing PSPICE or TI models into Cadence Virtuoso - Custom IC Design - Cadence Technology Forums - Cadence Community

Sorry to say, I may not be able to help here, since these models are developed exclusively to work with Pspice and TINA simulators.

Regards,

AK

Hi,

I imported the .CIR file in the pspice view. But the "U" instance is not supported, could you tell me what component this "U" instance is referring to, so that i can find an alternative for it and try that.

Regards

Avi Singhal

Hi,

These are referring to the internal nodes of the buffer. This is a custom implementation done by the model developer, so I don't think you can replace with some other libraries.

I think the problem is due to the syntax mismatch between pspice and spectre. 

Regards,

AK