Datasheet

AD9246
Rev. A | Page 13 of 44
0
–140
0 62.500
FREQUENCY (MHz)
AMPLITUDE (dBFS)
–20
–40
–60
–80
–100
–120
15.625 31.250 46.875
125MSPS
29.1MHz @ –7dBFS
32.1MHz @ –7dBFS
SFDR = 85dBc (92dBFS)
05491-025
Figure 24. AD9246-125 Two-Tone FFT with f
IN1
= 29.1 MHz, f
IN2
= 32.1 MHz
0
–140
0 62.500
FREQUENCY (MHz)
AMPLITUDE (dBFS)
–20
–40
–60
–80
–100
–120
15.625 31.250 46.875
125MSPS
169.1MHz @ –7dBFS
172.1MHz @ –7dBFS
SFDR = 84dBc (91dBFS)
05491-026
Figure 25. AD9246-125 Two-Tone FFT with f
IN1
= 169.1 MHz, f
IN2
= 172.1 MHz
0
–20
–40
–80
–100
–60
–120
0 15.36 30.72 46.08 61.44
05491-085
AMPLITUDE (dBFS)
FREQUENCY (MHz)
Figure 26. AD9246-125 Two 64k WCDMA Carriers
with f
IN
= 215.04 MHz, f
S
= 122.88 MSPS
0
–120
–90 –6
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc and dBFS)
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
–20
–40
–60
–80
–100
–78 –66 –54 –42 –30 –18
05491-028
Figure 27. AD9246 Two-Tone SFDR/IMD vs. Input Amplitude (AIN)
with F
IN1
= 29.1 MHz, F
IN2
= 32.1 MHz
0
–120
–90 –6
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc and dBFS)
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
–20
–40
–60
–80
–100
–78 –66 –54 –42 –30 –18
05491-029
Figure 28. AD9246 Two-Tone SFDR/IMD vs. Input Amplitude (AIN)
with F
IN1
= 169.1 MHz, F
IN2
= 172.11 MHz
0
–120
0 62.500
FREQUENCY (MHz)
AMPLITUDE (dBFS)
15.625 31.250 46.875
05491-089
–20
–40
–60
–80
–100
NPR = 62.9dBc
NOTCH @ 18.5MHz
NOTCH WIDTH = 3MHz
Figure 29. AD9246 Noise Power Ratio (NPR)