ADS6444IRGCT 查看數據表（PDF） - STMicroelectronics
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ADS6444IRGCT Datasheet PDF : 75 Pages
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ADS6442 (Fsrated = 65 MSPS) (continued)
ADS6445, ADS6444
ADS6443, ADS6442
SLAS531 – MAY 2007
PERFORMANCE vs CLOCK AMPLITUDE (differential)
96
80
94 fIN = 50.1 MHz
79
92
78
90
77
SFDR
88
76
86
75
84
74
SNR
82
73
80
0.5
1.0
1.5
2.0
2.5
Input Clock Amplitude − VPP
Figure 72.
72
3.0
G067
PERFORMANCE vs CLOCK DUTY CYCLE
95
76
93
75
SFDR
91
74
89
SNR
87
fIN = 20.1 MHz
85
35
40
45
50
55
60
Input Clock Duty Cycle − %
Figure 73.
73
72
71
65
G068
POWER DISSIPATION vs SAMPLING FREQUENCY
2.0
1.8
1.6
1.4
1.2
1.0
0.8
AVDD
0.6
0.4
LVDD
0.2
0.0
0
10
20
30
40
50
60
fS − Sampling Frequency − MSPS
G069
Figure 74.
OUTPUT NOISE HISTOGRAM WITH
INPUTS TIED TO COMMON-MODE
40
RMS LSB = 1.027
35
30
25
20
15
10
5
0
8189 8190 8191 8192 8193 8194 8195 8196 8197
Output Code
G070
Figure 75.
PERFORMANCE IN EXTERNAL REFERENCE MODE
96
76
fIN = 50.1 MHz
External Reference Mode
94
74
SNR
92
72
90
SFDR
70
88
68
86
66
1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70
VVCM − VCM Voltage − V
G071
Figure 76.
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
0
CMRR vs FREQUENCY
50
100
150
200
250
300
f − Frequency − MHz
G018
Figure 77.
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