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AD4697BCPZ датащи(PDF) 86 Page - Analog Devices |
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AD4697BCPZ датащи(HTML) 86 Page - Analog Devices |
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86 / 107 page ![]() Data Sheet AD4697/AD4698 APPLICATIONS INFORMATION analog.com Rev. 0 | 86 of 107 When the advanced sequencer, two-cycle command mode or sin- gle-cycle command mode is enabled, the sequence of analog input channels is more flexible, and the channel sequence can be designed to implement multiple effective sample rates. This design option is useful in applications with a combination of channels with low frequency or dc signals and channels with high frequency or ac signals. The Implementing Two Effective Channel Sample Rates section describes how to design a channel sequence that achieves two effective sample rates for two sets of channels. Table 29 and Figure 126 shows an example of a sequence that achieves three effective sample rates with four analog inputs. The sequence in Table 29 and Figure 126 can be implemented with the advanced sequencer and two-cycle command mode, or single- cycle command mode. The advanced sequencer, two-cycle command mode, and single- cycle command mode can also be utilized to perform aperiodic conversions on analog inputs, for example, when all channels have dc type signals, or when the channel sequencing involves adaptive control logic. Table 29. Multiple Effective Sample Rates Example Sequence Position Input Effective Sample Rate of Input 0 IN0 fCNV/2 1 IN1 fCNV/4 2 IN0 fCNV/2 3 IN2 fCNV/8 4 IN0 fCNV/2 5 IN1 fCNV/4 6 IN0 fCNV/2 7 IN3 fCNV/8 Figure 126. Multiple Effective Sample Rates Example |
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