AD9244 datasheet(16/37 Pages) AD

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AD9244

Rev. C | Page 15 of 36

FREQUENCY (MHz)

32.5

10.0

5.0

20.0

15.0

25.0

30.0

–20

–60

–40

–80

–100

–120

SNR = 67.5dBc

SFDR = 93.2dBc

Figure 28. Dual-Tone FFT with fIN−1 = 44.2 MHz and

fIN−2 = 45.6 MHz (AIN1 = AIN2 = –6.5 dBFS)

FREQUENCY (MHz)

32.5

10.0

5.0

25.0

20.0

15.0

30.0

100

120

SNR = 67.0dBc

SFDR = 78.2dBc

Figure 29. Dual-Tone FFT with fiN−1 = 69.2 MHz and

fIN−2 = 70.6 MHz (AIN1 = AIN2 = –6.5 dBFS)

FREQUENCY (MHz)

32.5

5.0

10.0

15.0

20.0

25.0

30.0

–20

–40

–60

–80

–100

–120

SNR = 65.0dBc

SFDR = 69.1dBc

Figure 30. Dual-Tone FFT with fIN−1 = 139.2 MHz and

fIN−2 = 140.7 MHz (AIN1 = AIN2 = –6.5 dBFS)

AIN (dBFS)

–5

–30

–25

–20

–15

–10

100

SFDR (dBFS)

SNR (dBFS)

SFDR (dBc)

SNR (dBc)

SFDR = 90dBc

REFERENCE LINE

Figure 31. Dual-Tone SNR/SFDR vs. AIN with

fIN−1 = 44.2 MHz and fIN−2 = 45.6 MHz

AIN (dBFS)

–5

–30

–25

–20

–15

–10

100

SNR (dBFS)

SNR (dBc)

SFDR (dBc)

SFDR (dBFS)

SFDR = 90dBc

REFERENCE LINE

Figure 32. Dual-Tone SNR/SFDR vs. AIN with

fIN−1 = 69.2 MHz and= fIN−2 = 70.6 MHz

AIN (dBFS)

–5

–30

–25

–20

–15

–10

100

SFDR (dBFS)

SNR (dBFS)

SNR (dBc)

SFDR (dBc)

SFDR = 90dBc

REFERENCE LINE

Figure 33. Dual-Tone SNR/SFDR vs. AIN with

fIN−1 = 139.2 MHz and fIN−2 = 140.7 MHz

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