ELECTRICAL CHARACTERISTICS
SLAS631A – APRIL 2009 – REVISED JULY 2009 ............................................................................................................................................................. www.ti.com
Typical values are at 25°C, AVDD = 3.3V, DRVDD = 1.8V, sampling frequency = 200 MSPS, 50% clock duty cycle, –1dBFS
differential analog input, internal reference mode, SNRBoost disabled, LVDS and CMOS interfaces unless otherwise noted.
Min and max values are across the full temperature range TMIN = –40°C to TMAX = 85°C, AVDD = 3.3V, DRVDD = 1.8V
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
SNR
Fin = 20 MHz
67
Signal to noise ratio
Fin = 70 MHz
66.8
dBFS
LVDS
Fin = 170 MHz
0 dB gain
64.5
66.3
6 dB gain
64.4
Table 1. SNR Enhancement With SNRBoost Enabled
SNRBoost bath-tub centered at Fsx0.25, –1 dBFS input applied at Fin = 125MHz, Sampling frequency = 200MSPS
SNR Within Specified bandwidth, dBFS
Bandwidth, MHz
In Default Mode (SNRBoost Disabled)
With SNRBoost Enabled(1)
MIN
TYP
MAX
MIN
TYP
MAX
5
78.8
79.6
83
85.6
10
75.8
76.6
80
82.6
15
74
74.9
78.2
80.9
20
72.7
73.6
77
79.6
30
71
71.9
74.4
76.4
40
69.8
70.6
72.7
74.5
(1)
Using recommended SNRBoost coefficients. See note on SNRBoost in application section.
6
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