Datasheet

Data Sheet AD9255
Rev. C | Page 21 of 44
100
95
90
85
80
75
70
65
0 50 100 150 200 250
300
SNR/SFDR (dBFS/dBc)
INPUT FREQUENCY (MHz)
SNR @ –40°C
SNR @ +25°C
SNR @ +85°C
SFDR @ –40°C
SFDR @ +25°C
SFDR @ +85°C
08505-142
Figure 42. AD9255-125 Single-Tone SNR/SFDR vs.
Input Frequency (f
IN
) and Temperature with 2 V p-p Full Scale
95
90
85
80
75
70
65
0 30025020015010050
SNR/SFDR (dBFS/dBc)
INPUT FREQUENCY (MHz)
SFDR
SNR
08505-143
Figure 43. AD9255-125 Single-Tone SNR/SFDR vs.
Input Frequency (f
IN
) with 1 V p-p Full Scale
0
–20
–40
–60
–80
–100
–120
–140
–90 –6–18
–30–42–54–66
–78
SFDR/IMD3 (dBc AND dBFS)
INPUT AMPLITUDE (dBFS)
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
08505-144
Figure 44. AD9255-125 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
IN
)
with f
IN1
= 29.1 MHz, f
IN2
= 32.1 MHz, f
S
= 125 MSPS
0
–20
–40
–60
–80
–100
–120
–140
–90 –6–18–30–42–54–66–78
SFDR/IMD3 (dBc AND dBFS)
INPUT AMPLITUDE (dBFS)
SFDR (dBc)
SFDR (dBFS)
IMD3 (dBc)
IMD3 (dBFS)
08505-145
Figure 45. AD9255-125 Two-Tone SFDR/IMD3 vs. Input Amplitude (A
IN
)
with f
IN1
= 169.1 MHz, f
IN2
= 172.1 MHz, f
S
= 125 MSPS
0
–20
–40
–60
–80
–100
–120
–140
0
10 20 30 605040
AMPLITUDE (dBFS)
FREQUENCY (MHz)
125MSPS
29.1MHz @ –7dBFS
32.1MHz @ –7dBFS
SFDR = 94.4dBc
(101.4dBFS)
08505-146
Figure 46. AD9255-125 Two-Tone FFT with f
IN1
= 29.1 MHz and f
IN2
= 32.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0 10 20 30 60
5040
AMPLITUDE (dBFS)
FREQUENCY (MHz)
125MSPS
169.1MHz @ –7dBFS
172.1MHz @ –7dBFS
SFDR = 79.5dBc (86.5dBFS)
08505-147
Figure 47. AD9255-125 Two-Tone FFT with f
IN1
= 169.1 MHz and
f
IN2
= 172.1 MHz