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Found an error in TI document TIDU026.pdf; not sure how to report it.

Arnold Kenneth
Prodigy 20 points
Other Parts Discussed in Thread: OPA2376, OPA192, TINA-TI, OPA4191, OPA4192, OPA4196, OPA4197

I found an error in TIDU-December 2013-Revised December 2013, but I'm not sure how to report it.  

So I'll just write it up here and hope it helps someone. 

Tim Green's write-up is excellent, and this correction might be considered nit-picking. 

In the section 5, modifications, the text says "For this single supply application, using OPA2376 dual op amp..."

I believe Tim's intention was to use one IC with two sections: U1a and U1b.

But the schematic indicates two separate IC's, U1 and U2, and the pin numbers wrong for the OPA2376. 

The pin numbers correspond to the OPA192, which was used earlier in the document. 

My guess is the recommendation to use the OPA2376 for single-rail applications was an afterthought, and that the schematic was only partially updated. 

  • 0
    TI__Genius 11135 points
    Arnold

    Thanks for bringing this to our attention. I will notify the document team.

    Regards
    Dennis
  • 0 in reply to Dennis Goeke
    TI__Expert 6275 points
    Arnold:
    You are 100% right on pin numbers for dual OPA2376. It should have been labeled U1A and U1B on OPA2376. We do not currently have correct pin numbers mapped on a dual or quad op amp for the part symbols used in TINA-TI SPICE simulator. It may seem simple but has never been addressed due to other priorities. However, on a positive note I can tell you that we have dedicated years to making our SPICE op amp macromodels match the data sheet which implies they match real silicon which implies that TINA-TI simulations will correlate very close to your first PCB.
    Let me know if we can help on other op amp things.
  • 0 in reply to Tim Green1
    Prodigy 20 points

    Thanks, Tim.  That explains it.

    While I've got you, my application is uses a single-ended +12VDC supply, so the OPA2376 probably isn't a solution. 

    Would you recommend the OPA192, or some other part? 

    (It would be great to have a quad device so that I could use one op-amp to buffer Vref.)

    Btw, it's an honor to get a direct reply from the Great and Powerful Wizard of Zo! 

  • 0 in reply to Arnold Kenneth
    TI__Guru 60610 points
    Yes, you could use OPA4192 and OPA4191, or their lower grades (less expansive) OPA4197 and OPA4196.
  • 0 in reply to Marek Lis
    TI__Genius 11135 points
    Arnold

    Since we haven't heard back we assume this answered your questions. If you need more help just post another reply.

    Thanks
    Dennis