ADS6424_10 Datasheet, PDF (29/71 Pages) Texas Instruments – QUAD CHANNEL, 12-BIT, 105/80/65 MSPS ADC WITH SERIAL LVDS INTERFACE

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ADS6424
ADS6423
ADS6422
SLAS532A – MAY 2007 – REVISED JUNE 2007
ADS6424 (F_srated = 105 MSPS) (continued)
SFDR vs INPUT FREQUENCY ACROSS GAINS
92
Input adjusted to get −1dBFS input
90
4 dB
88
86
5 dB
84
3 dB
82
6 dB
80
2 dB
78
0 dB
1 dB
76
74
10 30 50 70 90 110 130 150 170 190 210 230
f_IN − Input Frequency − MHz
G007
Figure 12.
PERFORMANCE vs AVDD
88
f_IN = 70.1 MHz
86 _{LVDD = 3.3 V}
84
SFDR
82
80
78
76
74
SNR
72
3.0
3.1
3.2
3.3
3.4
3.5
AV_DD − Supply Voltage − V
Figure 14.
78
77
76
75
74
73
72
71
70
3.6
G009
PERFORMANCE vs TEMPERATURE
86
75
84
74
SFDR
82
73
80
72
SNR
78
71
76
f_IN = 70.1 MHz
74
−40 −20
0
20
40
60
T − Temperature − °C
Figure 16.
70
69
80
G011
SINAD vs INPUT FREQUENCY ACROSS GAINS
72
0 dB
3.5 dB
71
2 dB _{1 dB}
70
3 dB
69
68
67
66
65
64
20
4 dB _{5 dB}
6 dB
40 60 80 100 120 140 160 180 200 220
f_IN − Input Frequency − MHz
G008
Figure 13.
PERFORMANCE vs LVDD
98
73
f_IN = 70.1 MHz
AV_DD = 3.3 V
94
72
90
SNR
71
86
70
SFDR
82
69
78
3.0
110
100
90
80
70
60
50
40
30
−40
3.1
3.2
3.3
3.4
3.5
LV_DD − Supply Voltage − V
Figure 15.
68
3.6
G010
PERFORMANCE vs INPUT AMPLITUDE
90
SFDR (dBFS)
85
80
SNR (dBFS)
75
70
65
SFDR (dBc)
60
55
f_IN = 20.1 MHz
50
−30
−20
−10
0
Input Amplitude − dBFS
G012
Figure 17.
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