ADS62P45_08 Datasheet, PDF (29/70 Pages) Texas Instruments – DUAL CHANNEL, 14-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS

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ADS62P45, ADS62P44
ADS62P43, ADS62P42
SLAS561A – JULY 2007 – REVISED FEBRUARY 2008
TYPICAL CHARACTERISTICS - ADS62P44 (F_S= 105 MSPS)
All plots are at 25°C, AVDD = DRVDD = 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, CMOS output
interface (unless otherwise noted)
0
−20
−40
−60
−80
−100
−120
−140
−160
0
0
−20
−40
−60
−80
−100
−120
−140
−160
0
96
94
92
90
88
86
84
82
80
78
76
0
FFT for 20 MHz INPUT SIGNAL
SFDR = 88.26 dBc
SINAD = 73.81 dBFS
SNR = 73.94 dBFS
THD = 88 dBc
10
20
30
40
f − Frequency − MHz
Figure 24.
50
G019
FFT for 190 MHz INPUT SIGNAL
SFDR = 82.36 dBc
SINAD = 71.57 dBFS
SNR = 72.09 dBFS
THD = 80.05 dBc
10
20
30
40
f − Frequency − MHz
Figure 26.
SFDR vs INPUT FREQUENCY
Gain = 3.5 dB
50
G021
Gain = 0 dB
25 50 75 100 125 150 175 200
f_IN − Input Frequency − MHz
G023
Figure 28.
FFT for 70 MHz INPUT SIGNAL
0
SFDR = 84.45 dBc
−20 ^{SINAD = 73.45 dBFS}
SNR = 73.8 dBFS
−40 ^{THD = 83.4 dBc}
−60
−80
−100
−120
−140
−160
0
10
20
30
40
f − Frequency − MHz
Figure 25.
50
G020
INTERMODULATION DISTORTION (IMD) vs FREQUENCY
0
−20
f_IN1 = 190.1 MHz, –7 dBFS
f_IN2 = 185.3 MHz, –7 dBFS
2-Tone IMD = –87 dBFS
−40
SFDR = –90 dBFS
−60
−80
−100
−120
−140
−160
0
10
20
30
40
f − Frequency − MHz
Figure 27.
50
G022
SNR vs INPUT FREQUENCY
76
75
Gain = 0 dB
74
73
72
Gain = 3.5 dB
71
70
0
25 50 75 100 125 150 175 200
f_IN − Input Frequency − MHz
G024
Figure 29.
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