Urgent!! What kind of CMOS Opamp can drive 300nF cap?

[tia_design]

Hi, all,

I need to design an CMOS op amp, the maximum loading is 300nF cap. Supply is 5V, slew rate is 5V/1mS, bandwidth is 100kHz. What kind of structure and compensation scheme can do this? Thanks


tia

 

[raduga_in]

An opamp with a kindof class AB buffer can be
likely candidate ..

 

[Alan_Nesta]

if only for cap-load, you can use 1-stage folded-cascode architecture, if you need large dc gain, you can add gain-boosting to it.
300nF load, 100kHz bandwidth, gm~200mS
sr=5v/ms, so tail current~1.5mA
need large current and large w/l for input pair.

 

[jecyhale]

I think it is better to use a buffer.

 

[jianbinma1979]

I think 1-stage op-amp is ok.The buffer is not needed. Just like Alan_Nesta says