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SBAS306A − NOVEMBER 2004 − REVISED DECEMBER 2004
TYPICAL CHARACTERISTICS (continued)
T
A
= 25°C, AVDD = 5V, DVDD = 1.8V, f
CLK
= 27MHz, and V = 2.5V, unless otherwise noted.
REF
OUTPUT SPECTRUM
High−Resolution Mode
Shorted Input
1,048,576 Points
NOISE HISTOGRAM
High−Resolution Mode
Shorted Input
1,048,576 Points
0
20
40
60
80
210k
180k
150k
120k
90k
60k
30k
0
−
−
−
−
−
−
−
−
−
100
120
140
160
180
0.1
1
10
100
1k
10k
100k
µ
Frequency (Hz)
Output ( V)
Figure 7
Figure 8
OUTPUT SPECTRUM
OUTPUT SPECTRUM
0
0
Low−Power Mode
Low−Power Mode
−
−
fIN = 1kHz, 20dBFS
−
−
−
−
fIN = 1kHz, 0.5dBFS
32,768 Points
−
−
−
−
20
40
60
80
20
40
60
80
32,768 Points
−
−
−
−
−
100
120
140
160
100
120
140
160
−
−
−
10
100
1k
10k
100k
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
Figure 9
Figure 10
OUTPUT SPECTRUM
NOISE HISTOGRAM
0
200k
180k
160k
140k
120k
100k
80k
Low−Power Mode
Low−Power Mode
Shorted Input
1,048,576 Points
−
−
−
−
20 Shorted Input
1,048,576 Points
40
60
80
−
−
−
−
−
100
120
140
160
180
60k
40k
20k
0
0.1
1
10
100
1k
10k
100k
Frequency (Hz)
µ
Output ( V)
Figure 11
Figure 12
9
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