Datasheet

AD9251
Rev. A | Page 14 of 36
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.
100
90
80
70
60
50
40
30
20
10
0
0 50 100 150 200
INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS/dBc)
07938-057
SFDR (dBc)
SNR (dBFS)
Figure 12. 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)
SNR/SFDR (dBFS/dBc)
07938-055
SFDR (dBc)
SNR (dBFS)
Figure 13. 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
DNL ERROR (LSB)
07938-038
Figure 14. DNL Error with f
IN
= 9.7 MHz
120
SNR
SNRFS
SFDR
SFDRFS
100
80
60
40
20
0
–90 –80 –60 –40 –20 0
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBFS)
07938-061
Figure 15. SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz
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
NUMBER OF HITS
07938-048
Figure 16. 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
INL ERROR (LSB)
07938-037
Figure 17. INL with f
IN
= 9.7 MHz