Datasheet

AD9629
Rev. 0 | Page 15 of 32
AD9629-20
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
–135
0.950 1.902.853.804.755.706.657.608.559.50
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08540-075
2
5
4
3
6
+
20MSPS
9.7MHz @ –1dBFS
SNR = 70.3dB (71.3dBFS)
SFDR = 94.1dBc
Figure 23. AD9629-20 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
AMPLITUDE (dBFS)
08540-076
2
5
4
3
6
+
20MSPS
30.6MHz @ –1dBFS
SNR = 70.2dB (71.2dBFS)
SFDR = 94.6dBc
0.950 1.902.853.804.755.706.657.608.559.50
FREQUENCY (MHz)
Figure 24. AD9629-20 Single-Tone FFT with f
IN
= 30.6 MHz
0
20
40
60
80
100
120
–70 –60 –50 –40 –30 –20 –10 0
SNR/SFDR (dBc AND dBFS)
INPUT AMPLITUDE (dBc)
SNR
SNRFS
SFDR
SFDRFS
08540-077
Figure 25. AD9629-20 SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz