Datasheet

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TYPICAL CHARACTERISTICS - ADS6245 (F
s
= 125 MSPS)
f − Frequency − MHz
−160
−140
−120
−100
−80
−60
−40
−20
0
0 10 20 30 40 50 60
Amplitude − dB
G001
SFDR = 88 dBc
SINAD = 74 dBFS
SNR = 74.3 dBFS
THD = 87.6 dBc
f − Frequency − MHz
−160
−140
−120
−100
−80
−60
−40
−20
0
0 10 20 30 40 50 60
Amplitude − dB
G002
SFDR = 86 dBc
SINAD = 72.63 dBFS
SNR = 72.76 dBFS
THD = 85 dBc
f − Frequency − MHz
−160
−140
−120
−100
−80
−60
−40
−20
0
0 10 20 30 40 50 60
Amplitude − dB
G003
SFDR = 77.9 dBc
SINAD = 68 dBFS
SNR = 69.2 dBFS
THD = 75.3 dBc
f − Frequency − MHz
−160
−140
−120
−100
−80
−60
−40
−20
0
0 10 20 30 40 50 60
Amplitude − dB
G004
f
IN
1 = 185.1 MHz, –7 dBFS
f
IN
2 = 190.1 MHz, –7 dBFS
2-Tone IMD = –86 dBFS
SFDR = –95 dBFS
f
IN
− Input Frequency − MHz
74
76
78
80
82
84
86
88
90
92
0 50 100 150 200 250
SFDR − dBc
G005
Gain = 0 dB
Gain = 3.5 dB
f
IN
− Input Frequency − MHz
67
68
69
70
71
72
73
74
75
0 50 100 150 200 250
SNR − dBFS
G006
Gain = 0 dB
Gain = 3.5 dB
ADS6245 , ADS6244
ADS6243 , ADS6242
SLAS542A – MAY 2007 – REVISED JULY 2007
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)
FFT for 10 MHz INPUT SIGNAL FFT for 100 MHz INPUT SIGNAL
Figure 6. Figure 7.
FFT for 230 MHz INPUT SIGNAL INTERMODULATION DISTORTION (IMD) vs FREQUENCY
Figure 8. Figure 9.
SFDR vs INPUT FREQUENCY SNR vs INPUT FREQUENCY
Figure 10. Figure 11.
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