I learned that basically the only difference between a "single supply" OP amp and a dual supply one is that the former can drive much closer to the negative supply rail.
Furthermore if I understand correctly, if you enable a "single supply" OP amp to drive closer to the positive supply rail too, then it becomes a rail-to-rail OP amp.
Then my question, which I believe is something not unnatural to come up with at this point, is that there can be "negative single supply" OP amps which drives close to the positive supply rail but not negative.
Has there been any such product, at present or in the past? Or is it meaningless to develop such a product (e.g. it costs more than an rail-to-rail device so it makes no sense.)?
It may be a stupid question but I will be glad if you could share me your knowledge.
Thank you in advance.
EDIT: I am sorry that I must have clarified that I am not asking about how to handle negative input with generic OP amps but about some existence (or possible application) of a weird device easily imagined to be validly designed.
I wanted to know whether there is (or has been) an "inverted" version of the so-called single-supply OP amps which has the capability to operate around the positive supply rail but not around negative in terms of the output voltage, so that it can be typically used with negative supply (thus I called them "negative single-supply OP amps").
Such device would be advantageous over rail-to-rail OP amps if it could be sold cheaper and the users are sure that they are never operating near the negative supply.
This is analogous to "positive single-supply OP amps" which are preferred because of lower cost when the users are sure they are never operating near the positive supply rail.
I understand there is very little demand for such a product because the range of application is limited, but I kept wondering because I have seen far weirder devices.
I apologize for the lack of explanation in the original post.