beargebinjie
Junior Member level 3
hi guys ,i am doing with a delta-sigma adc which used to measure a nearly dc signal ,i found it is hard to hace an opamp with bandwidth less than 800k but with its gain larger than 80db and phase marge more than 80 °. and of course the settling time is also a important specification, it is really difficult to achevie this spec. Is there anyone have good idea to tradoff between settling time and PM, the compensation capacitor is key factor .