Datasheet

AD9244
Rev. C | Page 15 of 36
02404-028
FREQUENCY (MHz)
32.50 10.05.0 20.015.0 25.0 30.0
AMPLITUDE (dBFS)
0
–20
–60
–40
–80
–100
–120
SNR = 67.5dBc
SFDR = 93.2dBc
Figure 28. Dual-Tone FFT with f
IN−1
= 44.2 MHz and
f
IN−2
= 45.6 MHz (A
IN1
= A
IN2
= –6.5 dBFS)
02404-029
FREQUENCY (MHz)
32.50 10.05.0 25.020.015.0
3
0
.
0
AMPLITUDE (dBFS)
0
20
40
60
80
100
120
SNR = 67.0dBc
SFDR = 78.2dBc
Figure 29. Dual-Tone FFT with f
iN−1
= 69.2 MHz and
f
IN−2
= 70.6 MHz (A
IN1
= A
IN2
= –6.5 dBFS)
02404-030
FREQUENCY (MHz)
32.50 5.0 10.0 15.0 20.0 25.0 30.0
AMPLITUDE (dBFS)
0
–20
–40
–60
–80
–100
–120
SNR = 65.0dBc
SFDR = 69.1dBc
Figure 30. Dual-Tone FFT with f
IN−1
= 139.2 MHz and
f
IN−2
= 140.7 MHz (A
IN1
= A
IN2
= –6.5 dBFS)
02404-031
A
IN
(dBFS)
–5–30 –25 –20 –15 –10
dBFS AND dBc
100
90
80
70
60
50
40
SFDR (dBFS)
SNR (dBFS)
SFDR (dBc)
SNR (dBc)
SFDR = 90dBc
REFERENCE LINE
Figure 31. Dual-Tone SNR/SFDR vs. A
IN
with
f
IN−1
= 44.2 MHz and f
IN−2
= 45.6 MHz
02404-032
A
IN
(dBFS)
–5–30 –25 –20 –15 –10
dBFS AND dBc
100
90
80
70
60
50
40
SNR (dBFS)
SNR (dBc)
SFDR (dBc)
SFDR (dBFS)
SFDR = 90dBc
REFERENCE LINE
Figure 32. Dual-Tone SNR/SFDR vs. A
IN
with
f
IN−1
= 69.2 MHz and= f
IN−2
= 70.6 MHz
02404-033
A
IN
(dBFS)
–5–30 –25 –20 –15 –10
dBFS AND dBc
100
90
80
70
60
50
40
SFDR (dBFS)
SNR (dBFS)
SNR (dBc)
SFDR (dBc)
SFDR = 90dBc
REFERENCE LINE
Figure 33. Dual-Tone SNR/SFDR vs. A
IN
with
f
IN−1
= 139.2 MHz and f
IN−2
= 140.7 MHz