ADC t.STAB

john · ‎2008-07-22

Posted on July 23, 2008 at 03:26

ADC t.STAB

john · ‎2011-05-17

Posted on May 17, 2011 at 12:40

Hi,

In RM0008, it talks about waiting t.STAB time after a power on before

reading the ADC's.

What is the value of t.STAB ? I can't find it.

Note - I am repeatedly sampling 3 channels after a wakeup from STOP mode.

I assume that I too have to wait t.STAB in this situation ?

NB. if I don't sleep the CPU, I get more stable readings - I know this

could also be due to noise on power rails... but what do I need to be

doing in the software to ensure a good reading ?

Thanks,

John.

obtronix · ‎2011-05-17

Posted on May 17, 2011 at 12:40

t.stab is in the datasheets(max 1 usec)

lanchon · ‎2011-05-17

Posted on May 17, 2011 at 12:40

in all 4 of them, in table named ''ADC characteristics''.

john · ‎2011-05-17

Posted on May 17, 2011 at 12:40

Thanks for the help.

Do you know which data sheet ?

John.

lanchon · ‎2011-05-17

Posted on May 17, 2011 at 12:40

> what do I need to be doing in the software to ensure a good reading ?

fully turn on the ADC then wait t.stab before reading, as per ref manual indications.