ADS1274
ADS1278
www.ti.com
SBAS367–JUNE 2007
TYPICAL CHARACTERISTICS (continued)
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.
TOTAL HARMONIC DISTORTION
vs FREQUENCY
TOTAL HARMONIC DISTORTION
vs INPUT AMPLITUDE
0
-20
0
-20
High-Resolution Mode
VIN = -0.5dBFS
High-Resolution Mode
fIN = 1kHz
-40
-40
-60
-60
-80
-80
THD+N
THD
-100
-120
-140
-100
-120
-140
THD+N
THD
10
100
1k
10k
100k
100k
10k
-120
-100
-80
-60
-40
-20
0
0
0
Frequency (Hz)
Input Amplitude (dBFS)
Figure 19.
Figure 20.
TOTAL HARMONIC DISTORTION
vs FREQUENCY
TOTAL HARMONIC DISTORTION
vs INPUT AMPLITUDE
0
-20
0
-20
Low-Power Mode
VIN = -0.5dBFS
Low-Power Mode
fIN = 1kHz
-40
-40
-60
-60
-80
-80
THD+N
THD
THD+N
THD
-100
-120
-140
-100
-120
-140
10
100
1k
10k
-120
-100
-80
-60
-40
-20
Frequency (Hz)
Input Amplitude (dBFS)
Figure 21.
Figure 22.
TOTAL HARMONIC DISTORTION
vs FREQUENCY
TOTAL HARMONIC DISTORTION
vs INPUT AMPLITUDE
0
-20
0
-20
Low-Speed Mode
VIN = -0.5dBFS
Low-Speed Mode
-40
-40
-60
-60
-80
-80
THD+N
THD
THD+N
THD
-100
-120
-140
-100
-120
-140
10
100
1k
-120
-100
-80
-60
-40
-20
Frequency (Hz)
Input Amplitude (dBFS)
Figure 23.
Figure 24.
13
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