General > General Technical Chat
Chips with built-in RFI protection
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magic:
Well, the most damning evidence I found so far is the product's own web page.

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--- Quote from: T3sl4co1l on August 26, 2021, 11:56:05 am ---Suspect the Vos vs. Vcm is an artifact of the measurement.  Wouldn't make any sense for that to happen if it's an RRI structure, how would it know what GND is?  It's certainly NOT an RRI type, as it doesn't include GND, but does include VCC as any other classic JFET input stage.
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I agree it makes no sense, although it could know mid-supply if it wanted to (not ground) by a resistive divider. But it's inconceivable what technical or even marketing reasons could motivate that.
There is no such artifact in datasheets of similar chips listed by Kleinstein, that's the strangest thing :-//
I am not sure why I should disbelieve the manufacturer if it's them telling me that their product sucks.
rsjsouza:

--- Quote from: Kleinstein on August 26, 2021, 05:56:18 am ---There is an TLC072 already  (looks more like an improved version of the TLC272).

The naming of the TL072 H is really confusing.  It looks more like a lower cost version of the OPA2991 / TLV9352.
They really should have given it a different name.

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That is my biggest beef with this whole thing. They should have given it a different name. Even the curves on the datasheet are split between "H" and "non-H".
Kleinstein:
There are a few chips with odd part numbering:  take the LM2904 and LM2902 and guess which is dual and quad of the same internals  :-//.

To add to the confusion they have a TL082H too  - chances are it's the same internals.
rsjsouza:

--- Quote from: Kleinstein on August 26, 2021, 04:36:28 pm ---There are a few chips with odd part numbering:  take the LM2904 and LM2902 and guess which is dual and quad of the same internals  :-//.

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These weird numbers are inherited from National Semiconductor, so blame on them I guess. Years ago I had the same confusion with Burr Brown's super opamps OPA541, OPA548 and OPA549 - guess which one is the most powerful?


--- Quote from: Kleinstein on August 26, 2021, 04:36:28 pm ---To add to the confusion they have a TL082H too  - chances are it's the same internals.

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Indeed it is the same case.
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