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AN3137 датащи(PDF) 20 Page - STMicroelectronics |
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AN3137 датащи(HTML) 20 Page - STMicroelectronics |
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20 / 42 page ![]() ADC errors AN3137 20/42 Doc ID 16983 Rev 3 3.5.4 AC performance Usually ADC performance is good only when the spectrum of the input signal is limited from zero to half of the sampling frequency (Nyquist frequency). This is because an ADC design contains not only resistors but also capacitors (and parasitic RLC elements). Therefore frequency response degrades ADC performance if frequency increases. In case of AC measurement, the ADC frequency parameters must be studied; mainly signal-to-noise ratio (SNR), total harmonic distortion (THD) and spurious-free dynamic range (SFDR). |
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