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WEBENCH® Tools/INA216: PSPICE FILE

MARK KERESTES
Prodigy 80 points
Part Number: INA216
Other Parts Discussed in Thread: TINA-TI

Tool/software: WEBENCH® Design Tools

The INA216  PSPICE model I downloaded from your website will not run.
The subskt line shows 5 pins.
The INA datasheet does not have a seperate VDD but the model has 5 pins.
The model does not have a connection for VCM and here is teh WARNING I get:
WARNING: Less than two connections to node U1:VCM.
-------------------------------------------------------------------------------------------------------------------------------------------
** RELEASED BY: WEBENCH(R) DESIGN CENTER, TEXAS INSTRUMENTS INC.
* PART: INA216A1
* DATE: 07/06/2013
* MODEL TYPE: ALL IN ONE
* Simulator: Pspice
* Simulator Version: Pspice 16.2.0.p001 
* EVM ORDER NUMBER: N/A
* EVM USERS GUIDE: N/A
* DATASHEET: SBOS503C
* 
* MODEL VERSION: 1.0
  • 0
    TI__Mastermind 27715 points

    Hello Mark,

    Taking a look at the INA216 model, it was as you said made with a separate VDD pin. If you leave it floating, the model will not function. The error for VCM that you observed is due to the fact that VCM is an internal node which is derived from VDD.

    As a quick fix, I suggest simply shorting VDD to IN+ in your simulation schematic.

    Best regards,

    Ian Williams
    Applications Manager
    Current Sensing

  • 0 in reply to Ian Williams
    Prodigy 80 points

    I had already tried tying VDD to in+.

    The model only has one instance for VCM. I do not see VCM tied to anything else inside  the model.

  • 0 in reply to MARK KERESTES
    TI__Mastermind 27715 points

    Which simulator are you using? It works fine for me in Cadence 16.6 and TINA-TI.

    It also looks like you're getting a warning, and not an error. Does the warning prevent the sim from running?

    As a workaround, you can also try commenting out the VCM generator line. Simply place an asterisk (*) at the front of line 79 in the netlist, like as below:

    *EVCVS1      VCM 0 VDD GND  500M

    I tried this and the model still ran fine.

    Best regards,

    Ian Williams

  • 0 in reply to Ian Williams
    Prodigy 80 points

    I am trying to use the INA216 model in LTSPICE. Can you give LTSPICE a try?

    I could not get it to run with the VMC line commented either as you suggested. 

  • 0 in reply to MARK KERESTES
    TI__Mastermind 27715 points

    Hi Mark,

    I tried but was unable to get the model to work in LTSpice. I could make the errors go away by adding DC convergence resistors, but the model didn't function. 

    As I am unable to support LTSpice due to its EULA (competitors of ADI/LT like TI can't use LTSpice to promote their products), I suggest using our free simulator TINA-TI to continue simulating the INA216.

    Best regards,
    Ian Williams