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12F675 Analog Comparator Lowest Voltage Compare

 
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djpark



Joined: 02 Mar 2004
Posts: 49

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12F675 Analog Comparator Lowest Voltage Compare
PostPosted: Sun Jun 06, 2004 8:28 am     Reply with quote
I am hoping someone can enlighten me.

What is the lowest voltage I can compare reliably with PIC12F675 analog comparator with internal and external Vref?

The information in datasheet (Table 12.6 and 12-7) seem to be too new to me and find it hard to understand.

TIA,

-- dj
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sun Jun 06, 2004 3:03 pm     Reply with quote
Quote:
What is the lowest voltage I can compare reliably with PIC12F675
analog comparator with internal and external Vref?

In theory, you should be able to measure the voltage for 1 step
above ground. With a 5v reference ( using the internal reference,
when the PIC is running at 5v), one step will be approximately 5 mv.
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