Datasheet

AD9648
Rev. 0 | Page 20 of 44
AD9648-125
AVDD = 1.8 V, DRVDD = 1.8 V, maximum sample rate, VIN = −1.0 dBFS differential input, 1.0 V internal reference, and DCS enabled, unless
otherwise noted.
6M
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
12M 18M 24M 30M 36M 42M 48M 54M 60M6M
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
12M 18M 24M 30M 36M 42M 48M 54M 60M
2F1 – F2
2F2 – F1
2F1 + F2
FREQUENCY (MHz)
AMPLITUDE (Hz)
09975-067
Figure 14. Two-Tone FFT with f
IN1
= 29 MHz and f
IN2
= 32 MHz
50
55
60
65
70
75
80
85
90
95
100
0 50 100 150 200 250
ANALOG INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS/dBc)
SFDR (dBc)
SNR (dBFS)
09975-069
Figure 15. SNR/SFDR vs. Input Frequency (AIN) with 2 V p-p Full Scale
0
20
40
60
80
100
120
–90 –80 –70 –60 –50 –40 –30 –20 –10 0
SNR/SFDR (dBFS)
INPUT AMPLITUDE (dBFS)
09975-068
SFDRFS
SNR
SFDR
SNRFS
Figure 16. SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz
–110
–90
–70
–50
–30
–10
–
90
– 80
– 70
–
60
– 50
–
40
– 30
– 20
–
10
SFDR/IMD3 (dBc/dBFS)
INPUT AMPLITUDE (dBFS)
SFDR (dBc)
IMD3(dBc)
SFDR (dBFS)
IMD3 (dBFS)
09975-065
Figure 17. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with f
IN1
= 29 MHz
and f
IN2
= 32 MHz
0
20
40
60
80
100
120
5 15 25 35 45 55 65 75 85 95 105 115 125
SNR/SFDR (dBFS/dBc)
SAMPLE RATE (MSPS)
SNR (dBFS)
SFDR (dBc)
09975-020
Figure 18. SNR/SFDR vs. Sample Rate with AIN = 9.7 MHz
0
20
40
60
80
100
120
SNR/SFDR (dBFS/dBc)
5 15 25 35 45 55 65 75 85 95 105 115 125
SAMPLE RATE (MSPS)
SNR (dBFS)
SFDR (dBc)
09975-021
Figure 19. SNR/SFDR vs. Sample Rate with AIN = 70.1 MHz