Datasheet

AD9258
Rev. A | Page 23 of 44
100
95
90
85
80
75
70
65
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS AND dBc)
08124-025
SNR @ –40°C
SFDR @ –40°C
SNR @ +25°C
SFDR @ +25°C
SNR @ +85°C
SFDR @ +85°C
Figure 44. AD9258-125 Single-Tone SNR/SFDR vs. Input Frequency (f
IN
)
with 2 V p-p Full Scale
95
90
85
80
75
70
65
60
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS/dBc)
08124-026
SFDR (dBc)
SNR (dBFS)
Figure 45. AD9258-125 Single-Tone SNR/SFDR vs. Input Frequency (f
IN
)
with 1 V p-p Full Scale
0
–20
–40
–60
–80
–100
–120
–90 –78 –66 –54 –42 –30 –18 –6
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc AND dBFS)
08124-027
SFDR (dBc)
IMD3 (dBc)
SFDR (dBFS)
IMD3 (dBFS)
Figure 46. AD9258-125 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
–90 –78 –66 –54 –42 –30 –18 –6
INPUT AMPLITUDE (dBFS)
SFDR/IMD3 (dBc AND dBFS)
08124-028
SFDR (dBc)
IMD3 (dBc)
SFDR (dBFS)
IMD3 (dBFS)
Figure 47. AD9258-125 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 102030405060
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-029
125MSPS
29.1MHz @ –7dBFS
32.1MHz @ –7dBFS
SFDR = 88.8dBc (95.8dBFS)
Figure 48. AD9258-125 Two-Tone FFT with f
IN1
= 29.1 MHz and f
IN2
= 32.1 MHz
0
–20
–40
–60
–80
–100
–120
–140
0 102030405060
FREQUENCY (MHz)
AMPLITUDE (dBFS)
08124-030
125MSPS
169.1MHz @ –7dBFS
172.1MHz @ –7dBFS
SFDR = 81.7dBc (88.7dBFS)
Figure 49. AD9258-125 Two-Tone FFT with f
IN1
= 169.1 MHz and
f
IN2
= 172.1 MHz