THS4303 and ADS Compatibility Problem

Josip

Other Parts Discussed in Thread: THS4303

Hi everyone,

I'm trying to simulate circuit based on THS4303 operational amplifier in ADS2014. I'm using official PSPICE model downloaded from:

http://www.ti.com/lit/zip/slom133

Unfortunately, it seems that it doesn't work due to compatibility issues. I got the following error message:

Error detected by hpeesofsim during netlist flattening. 'ths4303.sbias' is an instance of an undefined model 'spice_vswitch'.

Does anyone has an idea how to solve this problem?
Any suggestions are most welcome!

Thank you,

Josip

over 9 years ago

0 John Miller - Sensing over 9 years ago

TI__Mastermind 36045 points

Josip,

The errors are due to the model's voltage-controlled switches.
When a user imports a Pspice or Hspice netlist, ADS creates a translated netlist (with a *.net extension).
ADS does a pretty good job translating other imported Pspice component models, but for some reason it struggles with switches.
All of the previous versions of ADS I have worked with had this problem.

When ADS tries to use the translated netlist in a simulation, some component syntax that didn't translate correctly will cause an error.
To make the THS4303 model work in ADS, the switch statements will have to be manually edited in the translated netlist.

I'll try to have a working netlist posted to this thread later this week, hopefully by Thursday.
Will this work okay with your schedule?

Regards,
John

0 Josip over 9 years ago in reply to John Miller - Sensing

Prodigy 60 points

Hi John,

Thursday seem fine to me.
Thank you very much for the explanation and your effort!

Best Regards,

Josip

0 John Miller - Sensing over 9 years ago in reply to Josip

TI__Mastermind 36045 points

Josip,

Apologies for delay.
The THS4303 model imported into ADS, and the only remaining error is due to a voltage-controlled switch.
I think it's used to support the shut-down feature in the model.
ADS can't seem to translate the Pspice switch syntax and the translated ADS netlist has to corrected manually.
I need to look up the correct switch syntax, but I'm having some problems accessing the Keysight/Agilent online references.
A request has been filed with their technical support. Once the syntax is available it should take an hour to finish & test the model.
Thank you for your patience.
Regards,
John

0 Josip over 9 years ago in reply to John Miller - Sensing

Prodigy 60 points

Hi John,

Thanks for your reply.

I also think that the PD switch makes problems. I hope you will succeed in finding a solution.

Please let me know when you have some new information.

Regards,

Josip

0 John Miller - Sensing over 9 years ago in reply to Josip

TI__Mastermind 36045 points

Josip,

An ADS2014 workspace with the THS4303 model is attached to this thread.
It contains the converted model and a test circuit that supports AC and transient simulations.
As I suspected, the syntax for the voltage-controlled switches had to be manually converted to AEL, the ADS netlist syntax.
Some internal nodes that used "+" and "-" signs in the node names had to be changed as well.
Please let me know if you have any questions.

Regards,
John

THS4303_ADS2014_wrk.zip