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Re: AD9218, what will the negative values be in binary mode?
biased at 1/3Vdd)
You would have 1/200 of the negative dynamic range, or 1/100 of the
span range which gives -10/1024.
As the output is set for 2s complement, the output will run from +511
to -512 (Hex = 0x1FF at +511 to 0x200 at -512) for an input of 1Vp-p,
so in this case, you should get 3F6, rounded to the nearest integer.
(-10 decimal)
Cheers
PeteS
Re: AD9218, what will the negative values be in binary mode?
My digital output is from 0-1024 (1MHz sine wave 0 -> -1, 1024 -> +1) and
fed into the
10 MSBs of DAC (TI DAC290x-EVM). Due to noise, the DAC has some below zero
values on oscilloscope (-20mV ~ 0.8V). When I connected this signal to ADC,
how do I
ensure that the digital output is the same (or nearly the same) value of my
original digital input?
(The requirement is such that after I captured the ADC O/P with logic
analyzer, plotted in
graph of 0~1024, it shows a sine wave without bad codes).
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