AD9864 datasheet(12/48 Pages) AD

12 / 48 page

Data Sheet

AD9864

Rev. A | Page 11 of 47

VDDI = VDDF = VDDA = VDDC = VDDL = VDDH = 3.0 V , VDDQ = VDDP = 2.7 V to 5.5 V, fCLK = 18 MSPS, fIF = 109.65 MHz, fLO =

107.4 MHz, fREF = 16.8 MHz, TA=25 Co, LO and CLK Synthesizer Disabled, unless otherwise noted.

CHANNEL BANDWIDTH (kHz)

10.0

7.5

1000

100

9.5

9.0

8.5

8.0

24-BIT

DATA

16-BIT

DATA

16-BIT DATA

WITH DVGA ENABLED

Figure 15. Noise Figure vs. Bandwidth

(Minimum Attenuation, fCLK = 26 MSPS)

VGA ATTENUATION (dB)

BW = 15kHz

(K = 0, M = 9)

BW = 75kHz

(K = 0, M = 1)

BW = 50kHz

(K = 0, M = 2)

Figure 16. Noise Figure vs. VGA Attenuation (fCLK = 18 MSPS)

IFIN (dB)

–45

–130

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–42

–39

–36

–33

–30

–27

–24

–5

–30

–10

–15

–20

–25

–40

–35

–45

IMD

Figure 17. IMD vs. IFIN (fCLK = 13 MSPS)

VGA ATTENUATION (dB)

11.5

7.0

11.0

10.5

10.0

9.5

9.0

8.5

8.0

7.5

BW = 6.78kHz

(K = 0, M = 15)

BW = 12.04kHz

(K = 0, M = 8)

BW = 27.08kHz

(K = 0, M = 3)

Figure 18. Noise Figure vs. VGA Attenuation (fCLK = 13 MSPS)

VGA ATTENUATION (dB)

BW = 27.08kHz

(K = 1, M = 9)

BW = 90.28kHz

(K = 1, M = 2)

BW = 135.42kHz

(K = 1, M = 1)

Figure 19. Noise Figure vs. VGA Attenuation (fCLK = 26 MSPS)

IFIN (dBm)

–45

–130

–30

–40

–50

–60

–70

–80

–90

–100

–110

–120

–42

–39

–36

–33

–30

–27

–24

–5

–30

–10

–15

–20

–25

–40

–35

–45

IMD

Figure 20. IMD vs. IFIN (fCLK = 18 MSPS)

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