Datasheet

V
VCM
− VCM Voltage − V
84
86
88
90
92
94
1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70
SFDR − dBc
G018
SNR − dBFS
68
69
70
71
72
73
f
IN
= 50.1 MHz
External Reference Mode
SNR
SFDR
Output Code
0
10
20
30
40
50
60
70
80
2044 2045 2046 2047 2048 2049 2050
Occurence − %
G017
RMS (LSB) = 0.407
f − Frequency − MHz
−100
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 50 100 150 200 250 300
CMRR − Common−Mode Rejection Ratio − dBc
G019
ADS6425
SLWS197B – MARCH 2007 – REVISED JUNE 2009 ......................................................................................................................................................... www.ti.com
TYPICAL CHARACTERISTICS (continued)
All plots are at 25 ° C, AVDD = LVDD = 3.3 V, sampling frequency = 125 MSPS, sine wave input clock, 1.5 V
PP
differential
clock amplitude, 50% clock duty cycle, – 1 dBFS differential analog input, internal reference mode, 0 dB gain, 32K point FFT
(unless otherwise noted)
OUTPUT NOISE HISTOGRAM WITH
INPUTS TIED TO COMMON-MODE PERFORMANCE IN EXTERNAL REFERENCE MODE
Figure 24. Figure 25.
CMRR
vs
FREQUENCY
Figure 26.
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