AD6684 datasheet(18/107 Pages) AD

18 / 107 page

AD6684

Data Sheet

Rev. 0 | Page 18 of 107

–160

–140

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

AIN = –1dBFS

SNRFS = 71.80dB

SFDR = 98.27dBFS

Figure 30. DDC Mode (4 DDCs, Decimate by 4, L, M, and F = 148) with

fIN = 305 MHz

–160

–140

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

AIN = –1dBFS

SNRFS = 71.80dB

SFDR = 98.27dBFS

–31.25

–21.25

–11.25

–1.25

8.75

18.75

28.75

Figure 31. DDC Mode (4 DDCs, Decimate by 8, L, M, and F = 148) with

fIN = 305 MHz

–160

–140

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

AIN = –1dBFS

SNRFS = 74.50dB

SFDR = 100.68dBFS

–15.625

–10.625

–5.625

–0.625

4.375

9.375

14.375

Figure 32. DDC Mode (4 DDCs, Decimate by 16, L, M, and F = 148) with

fIN = 305 MHz

–160

–140

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

AIN = –1dBFS

SNRFS = 74.50dB

SFDR = 100.68dBFS

2545

6585

105

125

Figure 33. NSR Mode (Decimate by 2, L, M, and F = 124) with fIN = 305 MHz

–140

–120

–100

–80

–60

–40

–20

FREQUENCY (MHz)

AIN = –1dBFS

SNRFS = 70.7dB

SFDR = 82dBFS

Figure 34. NSR Mode (LMF = 222) with fIN = 305 MHz

65.5

65.6

65.7

65.8

65.9

66.0

66.1

66.2

66.3

66.4

66.5

66.6

66.7

66.8

66.9

67.0

DIFFERENTIAL VOLTAGE (V)

Figure 35. SNR vs. Clock Amplitude (Differential Voltage), fIN = 155.3 MHz

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