ADS62P25 Datasheet, PDF (26/71 Pages) Texas Instruments – DUAL CHANNEL, 12-BITS, 125/105/80/65 MSPS ADC WITH DDR LVDS/CMOS OUTPUTS

ADS62P25, ADS62P24
ADS62P23, ADS62P22
SLAS576A – OCTOBER 2007 – REVISED FEBRUARY 2008
www.ti.com
TYPICAL CHARACTERISTICS - ADS62P25 (F_S= 125 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
FFT for 20 MHz INPUT SIGNAL
SFDR = 88.31 dBc
SINAD = 70.95 dBFS
SNR = 71.03 dBFS
THD = 87.1 dBc
10
20
30
40
50
60
f − Frequency − MHz
G001
Figure 7.
FFT for 190 MHz INPUT SIGNAL
0
SFDR = 78.88 dBc
−20 ^{SINAD = 69.49 dBFS}
SNR = 70.11 dBFS
−40 ^{THD = 77.27 dBc}
−60
−80
−100
−120
−140
−160
0
10
20
30
40
50
f − Frequency − MHz
Figure 9.
60
G003
94
92
90
88
86
84
82
80
78
76
0
SFDR vs INPUT FREQUENCY
Gain = 3.5 dB
Gain = 0 dB
25 50 75 100 125 150 175 200
f_IN − Input Frequency − MHz
G005
Figure 11.
FFT for 70 MHz INPUT SIGNAL
0
SFDR = 86.51 dBc
−20 ^{SINAD = 70.88 dBFS}
SNR = 71.01 dBFS
−40 ^{THD = 85.12 dBc}
−60
−80
−100
−120
−140
−160
0
10
20
30
40
50
f − Frequency − MHz
Figure 8.
60
G002
INTERMODULATION DISTORTION (IMD) vs FREQUENCY
0
−20
f_IN1 = 190.1 MHz, –7 dBFS
f_IN2 = 185.3 MHz, –7 dBFS
2-Tone IMD = –88.5 dBFS
−40 ^{SFDR = –96.08 dBFS}
−60
−80
−100
−120
−140
−160
0
10
20
30
40
50
60
f − Frequency − MHz
G004
Figure 10.
74
73
72
71
70
69
68
67
66
0
SNR vs INPUT FREQUENCY
Gain = 0 dB
Gain = 3.5 dB
25 50 75 100 125 150 175 200
f_IN − Input Frequency − MHz
G006
Figure 12.
26
Submit Documentation Feedback
Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): ADS62P25, ADS62P24 ADS62P23, ADS62P22