matrixofdynamism
Advanced Member level 2

This question is about op-amps and may look strange at first. Basically my question is that since, operational amplifier is a device which has 2 inputs and one output. One of the two inputs is inverting while the other is non-inverting. The output is equal to the difference between the inputs multiply by open loop gain that may be like a million.
Real op-amps come close to this ideal but have some leakage currents for biasing purpose and have slew rate.
I want to know, why isn't there a single all-purpose op-amp. All we need is a device with ultra low leakage current, ultra high slew rate, use single supply and not become badly effected by temperature. Why does an all-purpose op-amp not then exist?
Putting it in other words, we take the best of all different op-amps and put it all into one op-amp and name it all purpose op-amp. Why has this not been done?
On a side note, how to op-amps advertised for "audio" and "video" applications differ from other operational amplifiers? I mean all there is, is a device that has a huge open-loop gain and two inputs. I don't see why there should be an op-amp for audio applications and another for video e.t.c.
Real op-amps come close to this ideal but have some leakage currents for biasing purpose and have slew rate.
I want to know, why isn't there a single all-purpose op-amp. All we need is a device with ultra low leakage current, ultra high slew rate, use single supply and not become badly effected by temperature. Why does an all-purpose op-amp not then exist?
Putting it in other words, we take the best of all different op-amps and put it all into one op-amp and name it all purpose op-amp. Why has this not been done?
On a side note, how to op-amps advertised for "audio" and "video" applications differ from other operational amplifiers? I mean all there is, is a device that has a huge open-loop gain and two inputs. I don't see why there should be an op-amp for audio applications and another for video e.t.c.