Datasheet

AD9231
Rev. A | Page 14 of 36
AD9231-65
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, DCS
disabled, unless otherwise noted.
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
30 6 9 1215182124 3027 33
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08121-067
6
+
2
5
4
3
65MSPS
9.7MHz @ –1dBFS
SNR =70.3 (71.3dBFS)
SFDR = 94.2dBc
Figure 18. AD9231-65 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
30 6 9 1215182124 3027 33
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08121-069
+
2
5
4
3
6
65MSPS
30.6MHz @ –1dBFS
SNR = 70.2dB (71.2dBFS)
SFDR = 94.1dBc
Figure 19. AD9231-65 Single-Tone FFT with f
IN
= 30.6 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
30 6 9 1215182124 3027 33
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08121-068
6
4
3
5
+
2
65MSPS
69MHz @ –1dBFS
SNR = 69.9dB (70.9dBFS)
SFDR = 92.0dBc
Figure 20. AD9231-65 Single-Tone FFT with f
IN
= 69 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
08121-070
Figure 21. AD9231-65 SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz
0
10
20
30
40
50
60
70
80
90
100
0 50 100 150 200
SNR/SFDR (dBFS/dBc)
INPUT FREQUENCY (MHz)
SNR
SFDR
08121-071
Figure 22. AD9231-65 SNR/SFDR vs. Input Frequency (AIN) with
2 V p-p Full Scale