AD9649

Rev. 0 | Page 13 of 3

2

AD9649-65

AVDD = 1.8 V; DRVDD = 1.8 V, maximum sample rate, 2 V p-p differential input, 1.0 V internal reference; AIN = −1.0 dBFS, 50% duty cycle

clock, unless otherwise noted.

0

–15

–30

–45

–60

–75

–90

–105

–120

3

6

9

12

1518

21

2427

30

FREQUENCY (MHz)

4

3

5

6

2

65MSPS

9.7MHz @ –1dBFS

SNR = 73.5dB (74.5dBFS)

SFDR = 97.7dBc

0

–15

–30

–45

–60

–75

–90

–105

–120

3

6

9

12

1518

21

2427

30

FREQUENCY (MHz)

4

35

2

6

65MSPS

70.3MHz @ –1dBFS

SNR = 72.6dB (73.6dBFS)

SFDR = 94.1dBc

0

–15

–30

–45

–60

–75

–90

–105

–120

3

6

9

12

1518

21

2427

30

FREQUENCY (MHz)

65MSPS

30.5MHz @ –1dBFS

SNR = 73.3dB (74.3dBFS)

SFDR = 99.3dBc

4

3

5

6

2

120

SNR

SNRFS

SFDR

SFDRFS

100

80

60

40

20

0

–90

–80

–60

–40

–20

0

INPUT AMPLITUDE (dBFS)

100

90

80

70

60

50

40

30

20

10

0

0

50

100

150

200

INPUT FREQUENCY (MHz)

SFDR (dBc)

SNR (dBFS)

Figure 20. AD9649-65 SNR/SFDR vs. Input Frequency (AIN)

with 2 V p-p Full Scale