Hi,
These claims seems to be theoretically correct. Practical results
will depend on the type of signal and nature of the present noise.
A good explanation is to be found in the Analog Devices application
note AD9042.
Regards,
Per-Tore
LA7NO
At 16:00 04.01.2008, you wrote:
I found this on a web page and something doesn't sound right.
Comments welcome.
....
How is it possible to achieve a dynamic range of 112dB with a
resolution of just 14 bits?
It is correct that a 14-bit AD-Converter exhibits an effective signal
to noise ratio of only 75dB. However, this value comprises for the
whole bandwidth of 32MHz. By filtering appropriately and therefore
reducing the bandwidth B, a process gain of P = 10*Log10(32MHz/B) can
be achieved. With B=2400Hz, the process gain results in ca. 41dB,
therefore the dynamic range is increased to 75 + 41 = 116dB.
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