[time-nuts] 31bit ADC, 1000 samples per second
davidwhess at gmail.com
Tue Dec 11 01:03:14 UTC 2012
If it *was* missing codes in reality, it would not be the first time
TI made that kind of mistake. One of their not so early multi-slope
integrating converters was advertised to *not* return both plus zero
and minus zero which was a big feature at the time . . . but it did.
Almost nobody noticed that error for years.
On Mon, 10 Dec 2012 16:28:52 -0600, Didier Juges <shalimr9 at gmail.com>
>I agree, but there is a difference between something that you should be
>able to achieve by design and being able to prove it, or even if it's
>useful in practice.
>In a case like this, the wide span between resolution and effective bits
>makes me wonder what's the point of advertising the former other than
>On Mon, Dec 10, 2012 at 3:38 PM, David <davidwhess at gmail.com> wrote:
>> Integrating converters including delta-sigma converters can be no
>> missing codes by design without being able to take advantage of the
>> full resolution that implies. Integral nonlinearity, drift, and noise
>> will limit the usable resolution.
>> On Mon, 10 Dec 2012 15:08:38 -0600, Didier Juges <shalimr9 at gmail.com>
>> >How long does it take to prove it?
>> >And what's the point?
>> >On Mon, Dec 10, 2012 at 3:04 PM, Gerhard Hoffmann <dk4xp at arcor.de> wrote:
>> >> Am 10.12.2012 21:53, schrieb Didier Juges:
>> >> I do not understand how anyone can guaranty no missing codes when the
>> >>> lower
>> >>> 11 bits are essentially noise? (31 bits resolution versus 20 effective
>> >>> bits)
>> >> With that much noise it is really guaranteed that no code will be
>> >> :-) Gerhard
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