Datasheet

AD9231
Rev. A | Page 15 of 36
AD9231-40
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, DCS
disabled, unless otherwise noted.
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
20 4 6 8 10 12 14 16 2018
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08121-072
2
5
4
3
6
+
40MSPS
9.7MHz @ –1dBFS
SNR = 70.3dB (71.3dBFS)
SFDR = 93.8dBc
Figure 23. AD9231-40 Single-Tone FFT with f
IN
= 9.7 MHz
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
20 4 6 8 10 12 14 16 2018
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08121-073
2
5
4
6
+
3
40MSPS
30.6MHz @ –1dBFS
SNR = 70.2dB (71.2dBFS)
SFDR = 95.4dBc
Figure 24. AD9231-40 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
0
8121-074
Figure 25. AD9231-40 SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz