Datasheet

Data Sheet AD9255
Rev. C | Page 17 of 44
0
–20
–40
–60
–80
–100
–120
–140
0
10
20 30
5040
AMPLITUDE (dBFS)
FREQUENCY (MHz)
SECOND
HARMONIC
THIRD
HARMONIC
105MSPS
2.4MHz @ –1dBFS
SNR = 77.9dB (78.9dBFS)
SFDR = 91dBc
08505-118
Figure 18. AD9255-105 Single-Tone FFT with f
IN
= 2.4 MHz
0
–20
–40
–60
–80
–100
–120
–140
0 10
20 30 50
40
AMPLITUDE (dBFS)
FREQUENCY (MHz)
SECOND
HARMONIC
THIRD
HARMONIC
105MSPS
70.1MHz @ –1dBFS
SNR = 77.4dB (78.4dBFS)
SFDR = 88.7dBc
08505-119
Figure 19. AD9255-105 Single-Tone FFT with f
IN
= 70.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0 10 20 30 5040
AMPLITUDE (dBFS)
FREQUENCY (MHz)
SECOND
HARMONIC
THIRD
HARMONIC
105MSPS
140.1MHz @ –1dBFS
SNR = 76.7dB (77.7dBFS)
SFDR = 86.4dBc
08505-120
Figure 20. AD9255-105 Single-Tone FFT with f
IN
= 140.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0 10 20
30 50
40
AMPLITUDE (dBFS)
FREQUENCY (MHz)
SECOND
HARMONIC
THIRD
HARMONIC
105MSPS
200.3MHz @ –1dBFS
SNR = 75.4dB (76.4dBFS)
SFDR = 81.6dBc
08505-121
Figure 21. AD9255-105 Single-Tone FFT with f
IN
= 200.3 MHz
0
–20
–40
–60
–80
–100
–120
–140
0
10 20 30 5040
AMPLITUDE (dBFS)
FREQUENCY (MHz)
SECOND
HARMONIC
THIRD
HARMONIC
105MSPS
70.1MHz @ –6dBFS
SNR = 72.9dB (78.9dBFS)
SFDR = 91dBc
08505-122
Figure 22. AD9255-105 Single-Tone FFT with f
IN
= 70.1 MHz at −6 dBFS with
Dither Enabled
120
100
80
60
40
20
0
–100 –80–90 –70 –60 –50 –40 –30 –20 –10 0
SNR/SFDR (dBc AND dBFS)
INPUT AMPLITUDE (dBFS)
SNR (dBFS)
SFDR (dBc)
SNR (dBc)
SFDR (dBFS)
08505-123
Figure 23. AD9255-105 Single-Tone SNR/SFDR vs. Input Amplitude (A
IN
) with
f
IN
= 98.12 MHz