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Was It Necessary to Vandalize the OPA277 TINA Symbol?

Neil Albaugh
Genius 5430 points
Other Parts Discussed in Thread: OPA277, TINA-TI

Opening the OPA277 TINA-TI reference circuit revealed a circuit that was virtually unrecognizable-- the previous op amp symbol, which was the same standard symbol used in all the TI/BB op amps has been replaced with a non-standard  symbol that has now sprouted trim pins! The size of the new symbol is not compatible with TINA-TI circuits using the standard symbols so it is tedious to have to re-draw the circuit to accommodate this new OPA277 symbol. It is bad enough having to deal with some TI high-speed op amps that are drawn upside-down.

In addition, the reference circuit has been replaced by a circuit that looks like it was cobbled together by a beginner. Was this necessary? Improvements I can understand but this? I have attached the original OPA277 reference circuit (found in the TINA-TI "Examples" - "TI Test Circuits" - "OPA277 Test Circuit.TSC")

Open the one on the current TI OPA277 page and compare the two. Is anyone at TI paying attention to things like this?

 

OPA277 Test Circuit.TSC
  • 0
    TI__Guru 68541 points

    Neil,

    We are all in agreement that we should be using our standard op amp symbol for all macro-models and we do just that for all new op amps.  OPA277 non-standard symbol is a result of misunderstanding between us and another team working on a backlog of old legacy products with inadequate models.  W have been aware of this issue for some time and are working on fixing the problem.

  • 0 in reply to Marek Lis
    Genius 5430 points

    Thanks, Marek. I know that no old Burr-Brown people would allow that to happen.

    It sounds as if TI is running open-loop; no manager is coordinating the TINA-TI effort.