ADS7816UC Datasheet, PDF (14/59 Pages) Texas Instruments – Quad-Channel, 250-MSPS Receiver and Feedback ADC

ADS58H40
SBAS589B – AUGUST 2012 – REVISED NOVEMBER 2012
www.ti.com
TYPICAL CHARACTERISTICS (continued)
At +25°C, AVDD = 1.9 V, AVDD3V = 3.3 V, DRVDD = 1.8 V, rated sampling frequency, 0-dB gain, 14-bit burst mode, sine
wave input clock, 1.5-V_PP differential clock amplitude, 50% clock duty cycle, –1-dBFS differential analog input, DDR LVDS
output interface, and 32k-point FFT, unless otherwise noted.
FFT IN 14-BIT MODE INPUT FREQUENCY
FFT IN 11-BIT MODE WITH SNRBoost^3G+
(230 MHz)
INPUT FREQUENCY (150 MHz, 90-MHz Bandwidth)
0
0
SFDR = 81.9 dBc
BW = 90 MHz
SNR = 68.9 dBFS
(17.5 MHz to 107.5 MHz)
SINAD = 68.6 dBFS
A_IN = −1 dBFS
−20
THD = 79.4 dBc
−20 _{SFDR = 86.7 dBc}
SNR = 70.4 dBFS
SINAD = 70.3 dBFS
−40
−40
−60
−60
−80
−80
−100
−100
−120
0
25
50
75
100
125
Frequency (MHz)
G005
Figure 8.
FFT IN 11-BIT MODE WITH SNRBoost^3G+
INPUT FREQUENCY (185 MHz, 90-MHz Bandwidth)
0
BW = 90 MHz
(17.5 MHz to 107.5 MHz)
A_IN = −1 dBFS
−20 _{SFDR = 86.5 dBc}
SNR = 70.3 dBFS
SINAD = 70.2 dBFS
−40
−120
0
25
50
75
100
125
Frequency (MHz)
G006
Figure 9.
FFT IN 11-BIT MODE WITH SNRBoost^3G+
INPUT FREQUENCY (230 MHz, 90-MHz Bandwidth)
0
BW = 90 MHz
(17.5 MHz to 107.5 MHz)
A_IN = −1 dBFS
−20
SFDR = 84.7 dBc
SNR = 70.1 dBFS
SINAD = 70 dBFS
−40
−60
−60
−80
−80
−100
−100
−120
0
25
50
75
100
125
Frequency (MHz)
G007
Figure 10.
−120
0
25
50
75
100
125
Frequency (MHz)
G008
Figure 11.
14
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