Datasheet

Data Sheet AD9637
Rev. A | Page 15 of 40
0
–70 –60 –50 –40 –30
–20 –10
120
SNR/SFDR (dBFS/dBc)
INPUT AMPLITUDE (dBFS)
SFDRFS
SFDR
SNRFS
SNR
0
20
40
60
80
100
10215-026
Figure 27. SNR/SFDR vs. Analog Input Level, f
IN
= 9.7 MHz, f
SAMPLE
= 40 MSPS
105
20 3025 4035
SNR/SFDR (dBFS/dBc)
SAMPLE FREQUENCY (MSPS)
65
70
75
80
85
90
95
100
10215-027
SFDR
SNRFS
Figure 28. SNR/SFDR vs. Encode, f
IN
= 19.7 MHz
105
70
–40 85
SNR/SFDR (dBFS/dBc)
TEMPERATURE (°C)
75
80
85
90
95
100
–15 10 35 60
SFDR (dBc)
SNR (dBFS)
10215-028
Figure 29. SNR/SFDR vs. Temperature, f
IN
= 9.7 MHz, f
SAMPLE
= 40 MSPS
110
100
0
0 200
SNR/SFDR (dBFS/dBc)
INPUT FREQUENCY (MHz)
70
10
20
30
40
50
60
80
90
100 120 1408020
40
60
180
160
SFDR (dBc)
SNR (dBFS)
10215-029
Figure 30. SNR/SFDR vs. f
IN
, f
SAMPLE
= 40 MSPS
20 3025 4035
105
SNR/SFDR (dBFS/dBc)
SAMPLE FREQUENCY (MSPS)
65
70
75
80
85
90
95
100
SFDR
SNRFS
10215-030
Figure 31. SNR/SFDR vs. Encode, f
IN
= 30.5 MHz
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
900,000
800,000
1,000,000
N – 10
N – 9 N – 8 N – 7
N – 6 N – 5 N – 4 N – 3
N – 2 N – 1
N
N + 1
N + 2 N + 3 N + 4 N + 5 N + 6 N + 7 N + 8 N + 9
N + 10
NUMBER OF HITS
OUTPUT CODE
0.356 LSB RMS
10215-031
Figure 32. Input-Referred Noise Histogram, f
SAMPLE
= 40 MSPS