AD6654/PCB Analog Devices Inc, AD6654/PCB Datasheet - Page 37

• Manufacturer Part Number: AD6654/PCB
• Description: BOARD EVALUATION FOR AD6654
• Manufacturer: Analog Devices Inc

Specifications of AD6654/PCB

• Module/board Type: Evaluation Board
• For Use With/related Products: AD6554
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

EXAMPLE CALCULATIONS
Goal: Implement a filter with an input sample rate of 100 MHz
requiring 100 dB of alias rejection for a ±1.4 MHz pass band.
Solution: First determine the percentage of the sample rate that
is represented by the pass band.
BW
FRACTION
=
100
×
1
100
4 .
MHz
MHz
=
1
4 .
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In the −100 dB column in Table 15, find the value greater than
or equal to the pass-band percentage of the clock rate. Then
find the corresponding rate decimation factor (M
M
1.48%, which is slightly larger than the 1.4% calculated.
Therefore, for this example, the maximum bound on CIC
decimation rate is 6. A higher M
than the 100 dB required.
CIC
of 6, the frequency that has −100 dB of alias rejection is
CIC
means less alias rejection
CIC
). For an
AD6654