Datasheet

AD9258
Rev. A | Page 24 of 44
100
95
90
85
80
75
25 35 45 55 65 75 85 95 105 115 125
SAMPLE RATE (MSPS)
SNR/SFDR (dBFS/dBc)
08124-031
SNR (dBFS), CHANNEL B
SNR (dBFS), CHANNEL A
SFDR (dBc), CHANNEL A
SFDR (dBc), CHANNEL B
Figure 50. AD9258-125 Single-Tone SNR/SFDR vs. Sample Rate (f
S
)
with f
IN
= 70.1 MHz
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
08124-059
0.72LSB rms
Figure 51. AD9258-125 Grounded Input Histogram
2
0
1
–1
–2
0 2048 4096 6144 8192 10,240 12,288 14,336 16,384
OUTPUT CODE
INL ERROR (LSB)
08124-032
DITHER ENABLED
DITHER DISABLED
Figure 52. AD9258-125 INL with f
IN
= 9.7 MHz
0.50
0.25
0
–0.50
–0.25
0 2048 4096 6144 8192 10,240 12,288 14,336 16,384
OUTPUT CODE
DNL ERROR (LSB)
08124-033
Figure 53. AD9258-125 DNL with f
IN
= 9.7 MHz
100
90
80
70
60
50
40
30
0.75 0.80 0.85 0.90 0.95 1.00 1.05 1.10 1.15 1.20
INPUT COMMON-MODE VOLTAGE (V)
SNR/SFDR (dBFS/dBc)
08124-053
SNR (dBFS)
SFDR (dBc)
Figure 54. SNR/SFDR vs. Input Common Mode (VCM)
with f
IN
= 30 MHz