AD9649

Data Sheet

Rev. B | Page 12 of 32

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.

100

90

80

70

60

50

40

30

20

10

0

0

50

100

150

200

INPUT FREQUENCY (MHz)

SFDR (dBc)

SNR (dBFS)

Figure 10. AD9649-80 SNR/SFDR vs. Input Frequency (AIN)

with 2 V p-p Full Scale

120

100

80

60

40

20

0

10

20

30

40

50

60

70

80

SAMPLE RATE (MSPS)

SFDR (dBc)

SNR (dBFS)

Figure 11. AD9649-80 SNR/SFDR vs. Sample Rate with AIN = 9.7 MHz

0.5

0.4

0.3

0.2

0.1

0

–0.1

–0.2

–0.3

–0.4

–0.5

0

2048

4096

6144

8192

10,240 12,288 14,336 16,384

OUTPUT CODE

120

SNR

SNRFS

SFDR

SFDRFS

100

80

60

40

20

0

–90

–80

–60

–40

–20

0

INPUT AMPLITUDE (dBFS)

450,000

400,000

350,000

300,000

250,000

200,000

150,000

100,000

50,000

0

N – 4

N – 3

N – 2

N – 1

N

N + 1 N + 2 N + 3 N + 4

OUTPUT CODE

Figure 14. AD9649-80 Grounded Input Histogram

0.5

2.0

1.5

1.0

0

–0.5

–1.0

–1.5

–2.0

0

2048

4096

6144

8192

10,240 12,288 14,336 16,384

OUTPUT CODE