Single-ended and fully differential opamp, how to choose?

[Alles Gute]

It is said that fully differential opamp have many advantages over Single-ended opamp, better CMRR, larger voltage swing etc.
However, there are still many single-ended opamp in application. Why not just go fully differential?

 

[opamp741]

Re: Single-ended and fully differential opamp, how to choose

simplicity goes with single ended amps..u dont need to generate bias voltages and no efforts in developing CMFB ckts..

 

[moda]

Re: Single-ended and fully differential opamp, how to choose

With fully diff opamp you get much better Signal to noise ratio.

 

[ezt]

Re: Single-ended and fully differential opamp, how to choose

Fully differential OpAmps have lots of advantages over their Single ended counterparts. However, matching with old circuits make some companies to produce thier old products. But I don't agree with you. I mean , I don't think single-ended Amplifiers are so common nowadays. Even I know lots of people who don't call a single-ended amp an OpAmp.
Don't hesitate in using fully differential OpAmps.

Regards,
EZT

 

[Lantis]

Addiditonal CMFB circuit is necessary for fully differential opamps. Stability issue should be take care. That's the major drawback of fully differentail opamps.

 

[pixel]

Re: Single-ended and fully differential opamp, how to choose

Differential amplifiers have higher power consumptuion, but they are not much sensitive on a power supply variations.