Bypass capacitors, not all have equal esr performance for the same C value -
" Averaging is a real bad way, and has nothing to do wth goodd Design. " Its one
of many tools used in ADC work. Averaging very effective when dealing with uncorrelated
noise. As correlation rises in noise source effectiveness drops.
When you do an ADC design not uncommon to start with a higher res ADC and
as you accumulate errors in your error budget wind up at goal, eg. start with
a 16 bit to get to 10 bits over T and V and PSRR and Vref and INL and DNL errors.
Questions :
1) Are you seeking absolute or relative accuracy ? Design goal of either ?
2) Is this design over T and V and PSRR and....variation ?
3) Whats in the signal path in front of the A/D ?
4) What is design goal for resolution and accuracy ?
One other technique to insure a part is "quiet" is to shut down operations like PWM, UART, COMM,
and other internal operations that contribute to internal buss noise which then affects ADC
conversion operations. Also shut off un-used clocks....
ST32 errors -
Of course these all add......unless the ET includes the 4 other errors shown.
Regards, Dana.