Dear forum,
I'm building a power supply and I wonder how stable are DAC and ADC (the one that is 16 sigma-delta) on stm32f373. Do they drift much with age and temperature?
Another question: if I use a separate supply for Vref, how can I ensure it never exceeds Vcc+0.4V (esp. on startup)? I could put a a diode, but it may have a bigger drop.
UP on the second thought, a small-signal Schottky may do the job, but still ideas on proper power sequencing are welcome. May be I need a power supervisor or something that will only enable Vref after Vdd is up. Or, may be I can use MCU to enable Vref only after it boots and after some delay...