Re: OPA349 spice model acting weird

"Tom (at tomsweb.net)" <tomtorfs@xxxxxxxxxxxxxxxx> schrieb im Newsbeitrag
news:1120650714.692137.269580@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
>> > I tried the model with LTspice and see the same problem as you
>> > have described. I recommend you write a letter to AD.
>> Sorry, it's TI and not AD,
>
> TI just confirmed that their model is crap (actually I would prefer
> them not offering a model at all in that case!).
>
> --snip--
> You were requesting the information about OPA349 Spice macro model. Our
> OPA349 macromodel is not a very good one. It was written 5 years ago
> and I've found that it does have some problems (Especially Low Voltage
> problems,less than 3Volts) .Sorry for the inconvenience caused.
>
> You might want to consider using the TLV2401 device and the
> specifications are almost similar to OPA349. The TLV2401 device has a
> Spice model and it can be downloaded from TI website
> (http://focus.ti.com/docs/prod/folders/print/tlv2401.html#productmodels
> ).
> --snip--
>
> I'm now simulating with the TLV2401 model, which works. However, the
> real circuit will use a OPA349, because my supply is less than 2.5V
> (the minimum for TLV2401).
>
> greetings,
> Tom

Hello Tom,

thanks for this information. I will keep this message in my folder.

It sounds like TI will not spend any money/time to correct
this model. What a bad service to their customers when I assume
that they eventually know since 5 years that the model is wrong.

Best regards,
Helmut




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