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发表于 2011-6-14 06:00:58
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"明白误差为几个LSB的概念么? "
you are confusing two rudimentary concepts: accuracy (which is what you are talking about) and resolution (which is what the original poster is talking about).
you will always have inaccuracy issues at any sampling speed, from many different sources. for the most part, inaccuracy is independent of sampling speed.
you can sample at higher speeds, sometimes higher than specified. This is particularly a huge advance for SAR type adc: they generate MSB first and then move down to LSB. so if you terminate a SAR adc prematurely (ie at high sampling speeds), you still get the MSBs correctly.
few other ADCs have that advantage. |
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