Datasheet

AD9258
Rev. A | Page 18 of 44
120
110
100
90
80
70
–100 –90 –80 –70 –60 –50 –40 –30 –20 –10 0
INPUT AMPLITUDE (dBFS)
SNR/SFDR (dBFS)
08124-068
SNRFS (DITHER ON)
SNRFS (DITHER OFF)
SFDRFS (DITHER ON)
SFDRFS (DITHER OFF)
Figure 14. AD9258-80 Single-Tone SNR/SFDR vs. Input Amplitude (A
IN
)
with f
IN
= 30 MHz with and without Dither Enabled
100
95
90
85
80
75
70
65
0 50 100 150 200 250 300
INPUT FREQUENCY (MHz)
SNR/SFDR (dBFS AND dBc)
08124-069
SNR @ –40°C
SFDR @ –40°C
SNR @ +25°C
SFDR @ +25°C
SNR @ +85°C
SFDR @ +85°C
Figure 15. AD9258-80 Single-Tone SNR/SFDR vs. Input Frequency (f
IN
)
with 2 V p-p Full Scale
105
100
95
90
85
80
75
25 30 35 40 45 50 55 60 65 70 75 80
SAMPLE RATE (MSPS)
SNR/SFDR (dBFS AND dBc)
08124-070
SNR, CHANNEL B
SFDR, CHANNEL B
SNR, CHANNEL A
SFDR, CHANNEL A
Figure 16. AD9258-80 Single-Tone SNR/SFDR vs. Sample Rate (f
S
)
with f
IN
= 70.1 MHz
800,000
700,000
600,000
500,000
400,000
300,000
200,000
100,000
0
N – 3 N – 2 N – 1 N N + 1 N + 2 N + 3
OUTPUT CODE
NUMBER OF HITS
08124-071
Figure 17. AD9258-80 Grounded Input Histogram
2
1
0
–2
–1
INL ERROR (LSB)
DITHER ENABLED
DITHER DISABLED
0 2000 4000 6000 8000 10,000 12,000 14,000 16,000
OUTPUT CODE
08124-072
Figure 18. AD9258-80 INL with f
IN
= 9.7 MHz
0.50
0.25
0
–0.25
–0.50
OUTPUT CODE
DNL ERROR (LSB)
0 2000 4000 6000 8000 10,000 12,000 14,000 16,000
08124-073
Figure 19. AD9258-80 DNL with f
IN
= 9.7 MHz