I'm in need of a stable voltage regulator that's not too expensive and can source atleast 100mA. Ideally this is to provide a stable reference voltage as well as power supply. The voltage regulator I was originally using (from radioshack) is causing havoc with my ADC readings. Does anyone have any good part numbers to suggest?

Also, is there a *significant* benefit to using separate reference and supply voltage sources?

Thanks,
Dave