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f
IN
− Input Frequency − MHz
74
76
78
80
82
84
86
88
90
92
10 30 50 70 90 110 130 150 170 190 210 230
SFDR − dBc
G007
Input adjusted to get −1dBFS input
1 dB
0 dB
2 dB
4 dB
5 dB
6 dB
3 dB
f
IN
− Input Frequency − MHz
65
66
67
68
69
70
71
72
73
74
75
20 40 60 80 100 120 140 160 180 200 220
SINAD − dBFS
G008
2 dB
5 dB
1 dB
0 dB
3 dB
3.5 dB
4 dB
6 dB
SNR − dBFS
70
71
72
73
74
75
76
77
78
AV
DD
− Supply Voltage − V
72
74
76
78
80
82
84
86
88
3.0 3.1 3.2 3.3 3.4 3.5 3.6
SFDR − dBc
G009
SNR
SFDR
f
IN
= 50.1 MHz
LV
DD
= 3.3 V
SNR − dBFS
70
71
72
73
74
75
LV
DD
− Supply Voltage − V
78
82
86
90
94
98
3.0 3.1 3.2 3.3 3.4 3.5 3.6
SFDR − dBc
G010
f
IN
= 50.1 MHz
AV
DD
= 3.3 V
SNR
SFDR
70
71
72
73
74
75
76
77
78
Input Amplitude − dBFS
30
40
50
60
70
80
90
100
110
−60 −50 −40 −30 −20 −10 0
f
IN
= 20 MHz
SFDR − dBc, dBFS
G012
SNR − dBFS
SFDR (dBc)
SFDR (dBFS)
SNR (dBFS)
SNR − dBFS
71
72
73
74
75
76
77
T − Temperature − °C
74
76
78
80
82
84
86
−40 −20 0 20 40 60 80
SFDR − dBc
G011
f
IN
= 50.1 MHz
SNR
SFDR
ADS6245 , ADS6244
ADS6243 , ADS6242
SLAS542A – MAY 2007 – REVISED JULY 2007
TYPICAL CHARACTERISTICS - ADS6245 (F
s
= 125 MSPS) (continued)
All plots are at 25 ° C, AVDD = LVDD = 3.3 V, maximum rated sampling frequency, sine wave input clock, 1.5 V
PP
differential
clock amplitude, 50% clock duty cycle, – 1 dBFS differential analog input, internal reference mode, 0 dB gain (unless
otherwise noted)
SFDR vs INPUT FREQUENCY ACROSS GAINS SINAD vs INPUT FREQUENCY ACROSS GAINS
Figure 12. Figure 13.
PERFORMANCE vs AVDD PERFORMANCE vs LVDD
Figure 14. Figure 15.
PERFORMANCE vs TEMPERATURE PERFORMANCE vs INPUT AMPLITUDE
Figure 16. Figure 17.
28 Submit Documentation Feedback Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): ADS6245 ADS6244 ADS6243 ADS6242