Post Go back to editing

LTspice error using AD8214 model

Hi - I built a test-bench to compare some over-currrent detector circuits.
Using AD's model for the AD8214 I get the error:
error u2:v4: Missing value, assumed 0V @ DC using AD8214 model
I've put a ZIP of the project here:
www.nadler.com/backups/20180930_Multi_comparator_test.zip

Thanks in advance for any help!
Best Regards, Dave

Parents
  • Hello DaveN,

    This error message is a warning caused by this line shown below.

    V4 18 VOUT

    It has a missing voltage value as normally required in SPICE. The intention has been to make a 0V source. 

    V4 18 VOUT 0

    I have seen this habit often in models for PSPICE. I guess PSPICE simply assumes 0V in this case, but donesn't show any error/warning.

    Nevertheless LTSpice will correctly simulate with this model as it is.

    Best regards,
    Helmut

  • Thanks Helmut, I added the 0v per your suggestion and no more error.
    Again thanks, Best Regards, Dave

  • Hello Dave,

    The correct syntax for a SPICE-line with comment requires a ";". The "*" is for complet lines of comment.

    V4 18 VOUT 0 ; DRN: Added 0 per Helmut

    * comment

    I tried  a little bit more with the SPICE-model of the AD8214. I found it only works when GND of the AD8214 is connected to GND (0). ADI should rework this model to work on a floating supply. Therefore you could send a report to LTspice@analog.com .

    I changed your schematic and placed GND at the AD8214. I also did some more changes to get the simulation running. I don't guarantee the whole circuit is correctly working as you expect. There might be a newer version available for the TLC555 from TI.

    How can I upload  my zip-file?

    Helmut

  • Hello Dave,

    > How can I upload  my zip-file?

    I have sent the file to the email found on your web page.

    Helmut

  • Helmut - first of all, thank you so much for offering your time and expertise to respond to LTspice questions.  It is greatly appreciated.

    Secondly, I think you use Insert -> Insert image/video/file to attach a .zip file.  I find it a little awkward as it inserts a large thumbnail in the body of the message, but you can convert the large thumbnail to a link if you prefer.

Reply
  • Helmut - first of all, thank you so much for offering your time and expertise to respond to LTspice questions.  It is greatly appreciated.

    Secondly, I think you use Insert -> Insert image/video/file to attach a .zip file.  I find it a little awkward as it inserts a large thumbnail in the body of the message, but you can convert the large thumbnail to a link if you prefer.

Children
No Data