Datasheet

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SBAS306F − NOVEMBER 2004 − REVISED OCTOBER 2007
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9
TYPICAL CHARACTERISTICS (continued)
T
A
= 25°C, AVDD = 5V, DVDD = 1.8V, f
CLK
= 27MHz, VREFP = 2.5V, VREFN = 0V, unless otherwise noted.
Figure 7
OUTPUT SPECTRUM
0.1 1 10 100 1k
Frequency (Hz)
0
−
20
−
40
−
60
−
80
−
100
−
120
−
140
−
160
−
180
Amplitude (dB)
10k 100k
High−Resolution Mode
Shorted Input
1,048,576 Points
Figure 8
NOISE HISTOGRAM
−
30
−
28
−
26
−
24
−
22
−
20
−
18
−
16
−
14
−
12
−
10
−
8
−
6
−
4
−
2
0 2 4 6 8
10 12 14 16 18 20 22 24 26 28 30
Output (
µ
V)
210k
180k
150k
120k
90k
60k
30k
0
Number of Occurrences
High−Resolution Mode
Shorted Input
1,048,576 Points
Figure 9
OUTPUT SPECTRUM
10 100 1k
Frequency (Hz)
0
−
20
−
40
−
60
−
80
−
100
−
120
−
140
−
160
Amplitude (dB)
10k 100k
Low−Power Mode
f
IN
=1kHz,
−
0.5dBFS
32,768 Points
Figure 10
OUTPUT SPECTRUM
10 100 1k
Frequency (Hz)
0
−
20
−
40
−
60
−
80
−
100
−
120
−
140
−
160
Amplitude (dB)
10k 100k
Low−Power Mode
f
IN
=1kHz,
−
20dBFS
32,768 Points
Figure 11
OUTPUT SPECTRUM
0.1 1 10 100 1k
Frequency (Hz)
0
−
20
−
40
−
60
−
80
−
100
−
120
−
140
−
160
−
180
Amplitude (dB)
10k 100k
Low−Power Mode
Shorted Input
1,048,576 Points
Figure 12
NOISE HISTOGRAM
−
50
−
45
−
40
−
35
−
30
−
25
−
20
−
15
−
10
−
5
0 5
10 15 20 25 30 35 40 45 50
Output (
µ
V)
200k
180k
160k
140k
120k
100k
80k
60k
40k
20k
0
Number of Occurrences
Low−Power Mode
Shorted Input
1,048,576 Points