Datasheet

AD9649
Rev. 0 | Page 14 of 32
AD9649-40
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
2 4 6 8 10 12 14 16 18
FREQUENCY (MHz)
AMPLITUDE (dB)
4
3
5
6
2
40MSPS
9.7MHz @ –1dBFS
SNR = 73.5dB (74.5dBFS)
SFDR = 95.4dBc
08539-028
Figure 21. AD9649-40 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
2 4 6 8 10 12 14 16 18
FREQUENCY (MHz)
AMPLITUDE (dBFS)
4
3
5
6
2
40MSPS
30.5MHz @ –1dBFS
SNR = 73.2dB (74.2dBFS)
SFDR = 95.7dBc
08539-029
Figure 22. AD9649-40 Single-Tone FFT with f
IN
= 30.5 MHz
120
SNR
SNRFS
SFDR
SFDRFS
100
80
60
40
20
0
–90 –80 –60 –40 –20 0
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBFS)
08539-059
Figure 23. AD9649-40 SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz