Whats the difference between "resolution" and "effective no

[sagar]

Hi,

I need to know the difference between the above two quantities.
Especially,say my ADC resolution is 16bits and the ENOB is 14,what
performance variation does it cause to the ADC?

With regards,
Sagar

 

[John Miller]

It relates to the signal/noise ratio of the analog part of the system.

Have a look at http://www.signatec.com/products/an001.asp

"sagar" <sagarbirkar@gmail.com> wrote in message
news:ff3c576c.0407220305.41307c64@posting.google.com...

Hi,

I need to know the difference between the above two quantities.
Especially,say my ADC resolution is 16bits and the ENOB is 14,what
performance variation does it cause to the ADC?

With regards,
Sagar

 

[andy]

On Thu, 22 Jul 2004 08:23:46 -0400, John Miller wrote:

It relates to the signal/noise ratio of the analog part of the system.

Have a look at http://www.signatec.com/products/an001.asp

"sagar" <sagarbirkar@gmail.com> wrote in message
news:ff3c576c.0407220305.41307c64@posting.google.com...
Hi,

I need to know the difference between the above two quantities.
Especially,say my ADC resolution is 16bits and the ENOB is 14,what
performance variation does it cause to the ADC?

With regards,
Sagar

if you didn't get all the maths, i think what this means roughly is that
the ADC produces a 16bit output, but the overall noise/distortion in the
system means the output is only as good as a 'perfect' 14 bit ADC. i.e.
there's 2 bits worth of extra noise compared to what you might hope. but
this doesn't mean you should throw away the extra bits, as they still
contain some real signal.

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