Datasheet

f − Frequency − MHz
−160
−140
−120
−100
−80
−60
−40
−20
0
0 10 20 30 40 50 60
Amplitude − dB
G021
f
IN
1 = 185.1 MHz, –7 dBFS
f
IN
2 = 190.1 MHz, –7 dBFS
2-Tone IMD = –81 dBFS
SFDR = –91 dBFS
f
IN
− Input Frequency − MHz
72
74
76
78
80
82
84
86
88
90
0 50 100 150 200 250
SFDR − dBc
G007
Gain = 0 dB
Gain = 3.5 dB
f
IN
− Input Frequency − MHz
66
67
68
69
70
71
72
0 50 100 150 200 250
SNR − dBFS
G008
Gain = 0 dB
Gain = 3.5 dB
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
G009
Input adjusted to get −1dBFS input
1 dB
6 dB
0 dB
2 dB
4 dB
5 dB
3 dB
f
IN
− Input Frequency − MHz
65
66
67
68
69
70
71
72
20 40 60 80 100 120 140 160 180 200 220
SINAD − dBFS
G010
4 dB
6 dB
2 dB
5 dB
0 dB
3 dB
3.5 dB
1 dB
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
G011
SNR − dBFS
68
69
70
71
72
73
74
75
76
f
IN
= 50.1 MHz
LV
DD
= 3.3 V
SNR
SFDR
ADS6425
SLWS197B – MARCH 2007 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
All plots are at 25 ° C, AVDD = LVDD = 3.3 V, sampling frequency = 125 MSPS, 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, 32K point FFT
(unless otherwise noted)
INTERMODULATION DISTORTION (IMD) vs FREQUENCY SFDR vs INPUT FREQUENCY
Figure 12. Figure 13.
SNR vs INPUT FREQUENCY SFDR vs INPUT FREQUENCY ACROSS GAINS
Figure 14. Figure 15.
SINAD vs INPUT FREQUENCY ACROSS GAINS PERFORMANCE vs AVDD
Figure 16. Figure 17.
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