AD9873JS datasheet(26/39 Pages) AD

26 / 39 page

REV. 0

AD9873

–26–

If a particular application requires an

α value between 0.45 and 1,

the user must oversample the baseband data by at least a factor

of four.

The combined HB1, HB2, and CIC filter introduces, over the

frequency range of the data to be transmitted, a worst-case droop

of less than 0.2 dB.

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 10a. Cascaded Filter 12

× Interpolator (N = 3)

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 10b. Input Signal Spectrum (N = 3),

α = 0.25

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 10c. Response to Input Signal Spectrum (N = 3)

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 11a. Cascaded Filter 16

× Interpolator (N = 4)

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 11b. Input Signal Spectrum (N = 4),

α = 0.25

FREQUENCY – FS/2

1.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

–10

–20

–30

–40

–50

–60

–70

–80

Figure 11c. Response to Input Signal Spectrum (N = 4)

AD9873JS Datasheet(PDF) 26 Page - Analog Devices

AD9873JS Datasheet(HTML) 26 Page - Analog Devices

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