ADS1274
ADS1278
SBAS367F –JUNE 2007–REVISED FEBRUARY 2011
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TYPICAL CHARACTERISTICS
At TA = +25°C, High-Speed mode, AVDD = +5V, DVDD = +1.8V, IOVDD = +3.3V, fCLK = 27MHz, VREFP = 2.5V, and
VREFN = 0V, unless otherwise noted.
OUTPUT SPECTRUM
OUTPUT SPECTRUM
0
-20
0
-20
High-Speed Mode
High-Speed Mode
fIN = 1kHz, -0.5dBFS
fIN = 1kHz, -20dBFS
32,768 Points
32,768 Points
-40
-40
-60
-60
-80
-80
-100
-120
-140
-160
-100
-120
-140
-160
10
100
1k
10k
100k
100k
100k
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
Figure 1.
Figure 2.
OUTPUT SPECTRUM
NOISE HISTOGRAM
25k
20k
15k
10k
5k
0
High-Speed Mode
High-Speed Mode
Shorted Input
-20 Shorted Input
262,144 Points
262,144 Points
-40
-60
-80
-100
-120
-140
-160
-180
0
1
10
100
1k
10k
Frequency (Hz)
Output (mV)
Figure 3.
Figure 4.
OUTPUT SPECTRUM
OUTPUT SPECTRUM
0
-20
0
-20
High-Resolution Mode
fIN = 1kHz, -0.5dBFS
32,768 Points
High-Resolution Mode
fIN = 1kHz, -20dBFS
32,768 Points
-40
-40
-60
-60
-80
-80
-100
-120
-140
-160
-100
-120
-140
-160
10
100
1k
10k
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
Figure 5.
Figure 6.
10
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