Datasheet

−60
−50
−40
−30
−20
−10
0
0 50 100 150 200 250 300
Frequency of Input Common−Mode Signal (MHz)
CMRR (dB)
Input Frequency = 70MHz
50mV
PP
Signal Superimposed
on Input Common−Mode Voltage (0.95V)
−60
−50
−40
−30
−20
−10
0
0 10 20 30 40 50 60 70 80 90 100
Frequency of Signal on Supply (MHz)
PSRR (dB)
PSRR on AVDD Supply 50mV
PP
30
40
50
60
70
80
90
100
110
120
130
5 25 45 65 85 105 125
Sampling Frequency (MSPS)
Power (mW)
AVDD Power
DRVDD Power 200mV Swing
DRVDD Power 350mV Swing
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
5 25 45 65 85 105 125
Sampling Frequency (MSPS)
DRVDD Current (mA)
LVDS, 200mV Swing
LVDS, 350mV Swing
CMOS, 6pF Load Capacitance
CMOS, 8pF Load Capacitance
ADS4122, ADS4125
ADS4142, ADS4145
SBAS520A –FEBRUARY 2011– REVISED MARCH 2011 www.ti.com
TYPICAL CHARACTERISTICS: COMMON
At +25°C, AVDD = 1.8V, DRVDD = 1.8V, maximum rated sampling frequency, sine wave input clock, 1.5V
PP
differential clock
amplitude, 50% clock duty cycle, –1dBFS differential analog input, 0dB gain, low-latency mode, DDR LVDS output interface,
and 32k-point FFT, unless otherwise noted.
CMRR vs FREQUENCY PSRR vs FREQUENCY
Figure 91. Figure 92.
POWER vs SAMPLE RATE DRVDD CURRENT vs SAMPLE RATE
Figure 93. Figure 94.
54 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS4122 ADS4125 ADS4142 ADS4145