Datasheet

AD9608
Rev. 0 | Page 18 of 40
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.
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
6 121824303642485460
FREQUENCY (MHz)
AMPLITUDE (Hz)
2F1–F2
2F2–F1
2F1 + F2
+
09977-067
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
SNR/SFDR (dBFS/dBc)
ANALOG INPUT FREQUENCY (MHz)
SNRFS
SFDR
09977-035
Figure 15. SNR/SFDR vs. Input Frequency (AIN) with 2 V p-p Full Scale
0
20
40
60
80
100
120
5 25 45 65 85 105 125
SNR/SFDR (dBFS/dBc)
SAMPLE RATE (MSPS)
SFDR (dBc)
SNR (dBFS)
09977-031
Figure 16. SNR/SFDR vs. Sample Rate with AIN = 9.7 MHz
–92
–82
–72
–62
–52
–42
–32
–22
–12
–
2
–70 –60 –50 –40 –30 –20 –10
INPUT AMPLITUDE (dBFS)
IMD3 (dBc)
SFDR(dBc)
SFDR(dBFS)
IMD3 (dBFS)
09977-022
Figure 17. Two-Tone SFDR/IMD3 vs. Input Amplitude (AIN) with f
IN1
= 29 MHz
and f
IN2
= 32 MHz
0
10
20
30
40
50
60
70
80
90
–60 –50 –40 –30 –20 –10 0
SNR/SFDR (dBc AND dBFS)
INPUT AMPLITUDE (dBFS)
SNRFS
SFDR
SNR
SFDRFS
09977-033
Figure 18. SNR/SFDR vs. Input Amplitude (AIN) with f
IN
= 9.7 MHz
0
20
40
60
80
100
120
5 25 45 65 85 105 125
SNR/SFDR (dBFS/dBc)
SAMPLE RATE (MSPS)
SFDR (dBc)
SNR (dBFS)
09977-032
Figure 19. SNR/SFDR vs. Sample Rate with AIN = 70 MHz