Datasheet

AD9255 Data Sheet
Rev. C | Page 22 of 44
105
100
95
90
85
80
75
25 12511510595857565554535
SNR/SFDR (dBFS/dBc)
SAMPLE RATE (MSPS)
SFDR
SNR
08505-148
Figure 48. AD9255-125 Single-Tone SNR/SFDR vs. Sample Rate (f
S
)
with f
IN
= 70.1 MHz
1.4M
1.2M
1.0M
800k
600k
400k
200k
0
NUMBER OF HITS
OUTPUT CODE
N – 3
N – 2 N – 1 N
N + 1
N + 2 N + 3
0.63 LSB RMS
08505-149
Figure 49. AD9255-125 Grounded Input Histogram
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
0 16,00014,00012,00010,000
8000600040002000
INL ERROR (LSB)
OUTPUT CODE
INL WITHOUT DITHER
INL WITH DITHER
08505-150
Figure 50. AD9255-125 INL with f
IN
= 12.5 MHz
0.50
–0.50
–0.25
0
0.25
0 16,00014,00012,00010,0008000600040002000
DNL ERROR (LSB)
OUTPUT CODE
08505-151
Figure 51. AD9255-125 DNL with f
IN
= 12.5 MHz
100
90
80
70
60
50
40
0.75 1.201.151.101.051.000.950.900.850.80
SNR/SFDR (dBFS AND dBc)
INPUT COMMON-MODE VOLTAGE (V)
SFDR (dBc)
SFDR (dBFS)
08505-152
Figure 52. AD9255-125 SNR/SFDR vs. Input Common Mode (VCM)
with f
IN
= 30 MHz