Does the ADC has a builtin antialiasing filter?

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hi,

i've looked in sam3x datasheet , arduino.cc documentation, without success.

i want sample signal highest frequency greater 1mhz i'm interested in frequency range adc can sample. according nyquist–shannon sampling theorem must sample signal sampling rate >= 2 * signal highest frequency or alias.

this can fixed lpf cut frequency equal adc sampling rate / 2. want know if sam3xs adc (and others ucontrollers adcs) has lpf inside it.

quote
but want know if sam3xs adc (and others ucontrollers adcs) has lpf inside it.

no, ucontrollers not have lpf built in.
long time used use
http://www.maximintegrated.com/datasheet/index.mvp/id/1899
http://www.maximintegrated.com/datasheet/index.mvp/id/1880
there 3v , 5v models available.
and lot of others:
http://para.maximintegrated.com/results.mvp?fam=filt


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