Datasheet

90
86
82
78
74
70
SFDR(dBc)
0 50 100 150 200
350
InputFrequency(MHz)
300250
74
73
72
71
70
69
68
67
SNR(dBFS)
0 50 100 150 200
350
InputFrequency(MHz)
300250
90
86
82
78
74
70
66
SFDR(dBc)
0 0.5 1.0
6.0
Gain(dB)
1.5 2.0 3.02.5 3.5 5.54.0 4.5 5.0
150MHz
220MHz
300MHz
400MHz
500MHz
170MHz
73
72
71
70
69
68
67
66
65
64
63
SINAD(dBFS)
0 0.5 1.0
6.0
Gain(dB)
1.5 2.0 3.02.5 3.5 5.54.0 4.5 5.0
150MHz
170MHz
220MHz
300MHz
400MHz
500MHz
100
90
80
70
60
50
40
30
20
InputAmplitude(dBFS)
-60 0
SFDR(dBc,dBFS)
-40-50 -30 -20 -10
76
75
74
73
72
71
70
69
68
SNR(dBFS)
SFDR(dBFS)
SFDR(dBc)
SNR(dBFS)
InputFrequency=40.1MHz
100
90
80
70
60
50
40
30
20
InputAmplitude(dBFS)
-60 0
SFDR(dBc,dBFS)
-40-50 -30 -20 -10
76
75
74
73
72
71
70
69
68
SNR(dBFS)
SFDR(dBFS)
SFDR(dBc)
SNR(dBFS)
InputFrequency=170.1MHz
ADS4126 , ADS4129
ADS4146 , ADS4149
SBAS483G – NOVEMBER 2009–REVISED JANUARY 2011 www.ti.com
TYPICAL CHARACTERISTICS: ADS4149 (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, 1dB gain, low-latency mode, DDR LVDS output interface,
and 32k-point FFT, unless otherwise noted. Note that after reset, the device is in 0dB gain mode.
SFDR vs INPUT FREQUENCY (CMOS) SNR vs INPUT FREQUENCY (CMOS)
Figure 85. Figure 86.
SFDR ACROSS GAIN AND INPUT FREQUENCY SINAD ACROSS GAIN AND INPUT FREQUENCY
Figure 87. Figure 88.
PERFORMANCE ACROSS INPUT AMPLITUDE (Single PERFORMANCE ACROSS INPUT AMPLITUDE (Single
Tone) Tone)
Figure 89. Figure 90.
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Product Folder Link(s): ADS4126 ADS4129 ADS4146 ADS4149