Datasheet

AD9255 Data Sheet
Rev. C | Page 16 of 44
120
110
100
90
80
70
–100 –80–90 –70 –60 –50
–40 –30
–20
–10 0
SNR/SFDR (dBFS)
INPUT AMPLITUDE (dBFS)
SFDRFS (DITHER ON)
SFDRFS (DITHER OFF)
SNRFS (DITHER ON)
SNRFS (DITHER OFF)
08505-112
Figure 12. AD9255-80 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
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
08505-113
Figure 13. AD9255-80 Single-Tone SNR/SFDR vs.
Input Frequency (f
IN
) and Temperature with 2 V p-p Full Scale
105
100
95
90
85
80
75
25 8075
706560555045403530
SNR/SFDR (dBFS/dBc)
SAMPLE RATE (MSPS)
SFDR
SNR
08505-114
Figure 14. AD9255-80 Single-Tone SNR/SFDR vs. Sample Rate (f
S
)
with f
IN
= 70.1 MHz
1.6M
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
0.62 LSB RMS
08505-115
Figure 15. AD9255-80 Grounded Input Histogram
0 16,00014,00012,00010,0008000600040002000
1.0
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
INL ERROR (LSB)
OUTPUT CODE
INL WITHOUT DITHER
INL WITH DITHER
08505-116
Figure 16. AD9255-80 INL with f
IN
= 12.5 MHz
0.50
–0.50
–0.25
0
0.25
DNL ERROR (LSB)
OUTPUT CODE
08505-117
0 16,00014,00012,00010,0008000600040002000
Figure 17. AD9255-80 DNL with f
IN
= 12.5 MHz