Datasheet

AD9235 Data Sheet
Rev. D | Page 14 of 40
02461-027
SAMPLE RATE (MSPS)
60
0 10
20 30
40 50
ENOB (Bits)
9.7
12.2
11.7
11.2
10.7
10.2
SINAD (dBc)
75
72
69
66
63
60
AD9235-65:
1V SINAD
AD9235-40:
2V SINAD
AD9235-65:
2V SINAD
AD9235-20:
2V SINAD
AD9235-20:
1V SINAD
AD9235-40:
1V SINAD
Figure 27. SINAD vs. f
CLK
with f
IN
= Nyquist
02461-028
DUTY CYCLE (%)
65
35 40 45 50
55 60
SINAD/SFDR (dBc)
90
80
70
60
50
40
30
SINAD: DCS OFF
SFDR: DCS OFF
SFDR: DCS ON
SINAD: DCS ON
Figure 28. SINAD/SFDR vs. Clock Duty Cycle
02461-029
SAMPLE RATE (MSPS)
80–40 –30
–20 –10 0 10 20 30
40 50 60 70
SINAD/SFDR (dBc)
90
85
80
75
70
60
55
65
50
SINAD 2V DIFF
SINAD 1V DIFF
SFDR 1V DIFF
SFDR 2V DIFF
Figure 29. SINAD/SFDR vs. Temperature with f
IN
= 32.5 MHz
02461-030
TEMPERATURE (
°
C)
80–40 0–20 20 40 60
GAIN DRAFT (ppm/°C)
20
15
10
5
0
–5
–10
–15
–20
Figure 30. A/D Gain vs. Temperature Using an External Reference
02461-031
CODE
40000 500 1000 1500 2000 2500
3000 3500
INL (LSB)
1.0
0.8
0.6
0.4
0.2
0
–
0.2
–0.4
–0.6
–0.8
–1.0
Figure 31. Typical INL
02461-032
CODE
40000 500 1000
1500 2000 2500 3000 3500
DNL (LSB)
1.0
0.8
0.6
0.4
0.2
0
–
0.2
–0.4
–0.6
–0.8
–1.0
Figure 32. Typical DNL