Datasheet

−70 −60 −50 −40 −30 −20 −10 0
30
40
50
60
70
80
90
100
110
120
72
72.5
73
73.5
74
74.5
75
75.5
76
76.5
Amplitude (dBFS)
SFDR (dBc, dBFS)
SNR (dBFS)
SFDR (dBFS)
SFDR (dBc)
SNR
Input Frequency = 40MHz
62
63
64
65
66
67
68
69
70
71
72
73
74
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6
Gain (dB)
SINAD (dBFS)
170MHz
220MHz
300MHz
400MHz
−70 −60 −50 −40 −30 −20 −10 0
20
30
40
50
60
70
80
90
100
110
120
71.5
72
72.5
73
73.5
74
74.5
75
75.5
76
76.5
Amplitude (dBFS)
SFDR (dBc, dBFS)
SNR (dBFS)
SFDR (dBFS)
SFDR (dBc)
SNR
Input Frequency = 150MHz
0.8 0.85 0.9 0.95 1 1.05 1.1
70
74
78
82
86
90
71.5
72
72.5
73
73.5
74
Input Common−Mode Voltage (V)
SFDR (dBc)
SNR (dBFS)
SFDR
SNR
Input Frequency = 150MHz
ADS4122, ADS4125
ADS4142, ADS4145
www.ti.com SBAS520A –FEBRUARY 2011– REVISED MARCH 2011
TYPICAL CHARACTERISTICS: ADS4145 (continued)
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.
PERFORMANCE ACROSS INPUT AMPLITUDE
SINAD ACROSS GAIN AND INPUT FREQUENCY (Single Tone)
Figure 79. Figure 80.
PERFORMANCE ACROSS INPUT AMPLITUDE
(Single Tone) PERFORMANCE vs INPUT COMMON-MODE VOLTAGE
Figure 81. Figure 82.
Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 51
Product Folder Link(s): ADS4122 ADS4125 ADS4142 ADS4145