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TYPICAL CHARACTERISTICS - LOW SAMPLING FREQUENCIES
F
S
= 40 MSPS
f
IN
− Input Frequency − MHz
60
64
68
72
76
80
84
88
92
96
100
0 50 100 150 200 250 300 350 400 450 500
SFDR − dBc
G073
Gain = 0 dB
Gain = 3.5 dB
f
IN
− Input Frequency − MHz
62
64
66
68
70
72
74
76
0 50 100 150 200 250 300 350 400 450 500
SNR − dBFS
G074
Gain = 0 dB
Gain = 3.5 dB
F
S
= 25 MSPS
f
IN
− Input Frequency − MHz
50
60
70
80
90
100
0 50 100 150 200 250 300 350 400 450 500
SFDR − dBc
G075
Gain = 0 dB
Gain = 3.5 dB
f
IN
− Input Frequency − MHz
62
64
66
68
70
72
74
76
0 50 100 150 200 250 300 350 400 450 500
SNR − dBFS
G076
Gain = 0 dB
Gain = 3.5 dB
ADS6145, ADS6144
ADS6143, ADS6142
SLWS198B – JULY 2007 – REVISED MARCH 2008
All plots are at 25 ° C, AVDD = DRVDD = 3.3 V, 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, CMOS output interface (unless otherwise noted)
SFDR vs INPUT FREQUENCY SNR vs INPUT FREQUENCY
Figure 81. Figure 82.
SFDR vs INPUT FREQUENCY SNR vs INPUT FREQUENCY
Figure 83. Figure 84.
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