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SBAS308A− MAY 2004 − REVISED MARCH 2005
TYPICAL CHARACTERISTICS (continued)
Typical values at TA = +25°C, full temperature range is TMIN = −40°C to TMAX = +85°C, AVDD = DRVDD = 3.3V, sampling rate = 80MSPS,
50% clock duty cycle, 3VPP differential clock, and −1dBFS differential input, unless otherwise noted.
AC PERFORMANCE
vs INPUT AMPLITUDE
AC PERFORMANCE
vs INPUT AMPLITUDE
100
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
SNR (dBFS)
SNR (dBFS)
SFDR (dBc)
SFDR (dBc)
SNR (dBc)
SNR (dBc)
−
−
−
10
20
30
−
−
−
10
20
30
fIN = 220MHz
fIN = 150MHz
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
−
10
100 90
80
70
60
50
40
30
20
10
0
100 90
80
70
60
50
40
30 20
0
3.0
60
−
−
Input Amplitude dBFS
Input Amplitude dBFS
Figure 29
Figure 30
OUTPUT
AC PERFORMANCE
vs CLOCK AMPLITUDE
NOISE HISTOGRAM
40
35
30
25
20
15
10
5
95
90
85
80
75
70
65
fIN = 70MHz
SFDR
SNR
0
0
0.5
1.0
1.5
2.0
2.5
−
Differential Clock Amplitude
V
Code
Figure 31
Figure 32
WCDMA
AC PERFORMANCE
vs CLOCK DUTY CYCLE
CARRIER
0
100
95
90
85
80
75
70
65
fS = 76.8MSPS
fIN = 170MHz
fIN = 20MHz
SFDR
−
20
40
60
80
−
−
−
−
−
−
100
120
140
SNR
0
5
10
15
20
25
30
35
40
40
45
50
55
−
−
−
Clock Duty Cycle %
f
Frequency MHz
Figure 33
Figure 34
17
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