Datasheet

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Amplitude(dB)
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Frequency(MHz)
SFDR=94dBc
SNR=72.25dBFS
SINAD=72.20dBFS
THD=91.29dBc
7060
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Amplitude(dB)
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Frequency(MHz)
SFDR=82.5dBc
SNR=70.8dBFS
SINAD=70.4dBFS
THD=80.6dBc
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Amplitude(dB)
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Frequency(MHz)
SFDR=78.1dBc
SNR=68.4dBFS
SINAD=67.8dBFS
THD=75.2dBc
7060
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Amplitude(dB)
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Frequency(MHz)
EachToneat
7dBFSAmplitude
f =185MHz
f =190MHz
Two-ToneIMD=89.5dBFS
SFDR=95dBFS
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IN1
IN2
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SFDR(dBc)
0 50 100 150 200
500
InputFrequency(MHz)
300 400250 350 450
-2dBFSInput,0dBGain
-1dBFS ,1dBGainInput
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SNR(dBFS)
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InputFrequency(MHz)
300 400 500
-1dBFS ,1dBGainInput
-2dBFS ,0dBGainInput
ADS4126 , ADS4129
ADS4146 , ADS4149
www.ti.com SBAS483G – NOVEMBER 2009–REVISED JANUARY 2011
TYPICAL CHARACTERISTICS: ADS4146
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.
FFT FOR 10MHz INPUT SIGNAL FFT FOR 170MHz INPUT SIGNAL
Figure 57. Figure 58.
FFT FOR 300MHz INPUT SIGNAL FFT FOR TWO-TONE INPUT SIGNAL
Figure 59. Figure 60.
SFDR vs INPUT FREQUENCY SNR vs INPUT FREQUENCY
Figure 61. Figure 62.
Copyright © 2009–2011, Texas Instruments Incorporated Submit Documentation Feedback 43
Product Folder Link(s): ADS4126 ADS4129 ADS4146 ADS4149