Datasheet

NXP Semiconductors

Quick start ADC1415S, ADC1215S, ADC1115S, ADC1015S series (F1

or F2 versions)

Quick start

Quick start Rev. 5 — January 2011 19 of 28

3.3.4 Tools page

This page allows the user to calculate the coherent frequencies values involved of the acquisition

process. It gives an indication where the 6 first harmonics are located in the Nyquist zone.

Enter your analog and sampling frequencies in field. Indicate the number of samples to be

acquired, as well as the fixed parameter for the coherency calculation (Fs in our example

above). Press “UPDATE GRAPH” to look at the frequency plan, it gives also the real Fin

frequency (Refer to appendix A.1 for more details on coherency calculation):

Fig 12. SW_ADC_1_r02: “Tools” page

Note: The level of the harmonics shown does not reproduce the behavior of the ADC; they are only

given as indication for location.

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