Datasheet

InputFrequency(kHz)
SNR(dB)
90
88
86
84
82
80
0 100
20 40 60 80
5V
3V
InputFrequency(kHz)
SINAD(dB)
90
88
86
84
82
80
0 100
20 40 60 80
5V
3V
InputFrequency(kHz)
SINAD(dB)
-85
-90
-95
-100
-105
0 10020 40 60 80
3V
5V
InputFrequency(kHz)
SFDR(dB)
105
100
95
90
85
0 10020 40 60 80
5V
3V
Full-ScaleRange(V)
SNR(dB)
86
82
78
74
70
66
0 51
2 3 4
3V
f =10kHz
IN
5V
Full-ScaleRange(V)
SINAD(dB)
86
82
78
74
70
66
0 51
2 3 4
3V
f =10kHz
IN
5V
ADS7279
ADS7280
www.ti.com ............................................................................................................................................................... SBAS436A – MAY 2008 – REVISED JUNE 2009
TYPICAL CHARACTERISTICS (continued)
At – 40 ° C to +85 ° C, V
REF
[(REF+) – (REF – )] = 5V when +VA = +VBD = 5V or V
REF
[(REF+) – (REF – )] = 2.5V when +VA =
+VBD = 3V, f
SCLK
= 42MHz, or V
REF
= 2.5 when +VA = +VBD = 2.7V, f
SCLK
= 37.8MHz; f
I
= dc for dc curves, f
I
= 100kHz for ac
curves with 5V supply and f
I
= 10kHz for ac curves with 3V supply, unless otherwise noted.
SIGNAL-TO-NOISE RATIO SIGNAL-TO-NOISE AND DISTORTION
vs INPUT FREQUENCY vs INPUT FREQUENCY
Figure 18. Figure 19.
TOTAL HARMONIC DISTORTION SPURIOUS-FREE DYNAMIC RANGE
vs INPUT FREQUENCY vs INPUT FREQUENCY
Figure 20. Figure 21.
SIGNAL-TO-NOISE RATIO SIGNAL-TO-NOISE AND DISTORTION
vs FULL-SCALE RANGE vs FULL-SCALE RANGE
Figure 22. Figure 23.
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