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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
There is a significant advantage to using a separate reference - especially when you are using 10 bit (or more) A/Ds. I use an LM4120 - 4.096V. The fact that the output is an exact power of 2 makes things nice, also. You get exactly 4mV/count with a 10 bit converter.
If you decide to use the '4120, make certain you load the output with at least .2uF as in the data sheet.
Dave,
see: this thread
I have good results with the LP2950.
If quiescent current is an issue you may want to try the MCP1701