Datasheet

80
84
88
92
96
100
2.7 3.2 3.7 4.2 4.7 5.2 5.7
AVDD, Analog Supply Voltage (V)
Spurious Free Dynamic Range (dB)
f
IN
= 20 kHz
G026
80
84
88
92
96
100
2.5 3 3.5 4 4.5 5 5.5
Reference Voltage (V)
Spurious Free Dynamic Range (dB)
AVDD = 5.25 V
f
IN
= 20 kHz
G028
80
84
88
92
96
100
−40 −25 −10 5 20 35 50 65 80 95 110 125
Free-Air Temperature (°C)
Spurious Free Dynamic Range (dB)
AVDD = 3 V
f
IN
= 20 kHz
G027
80
84
88
92
96
100
0 20 40 60 80 100
f
IN
, Input Frequency (kHz)
Spurious Free Dynamic Range (dB)
AVDD = 3 V
G029
−120
−115
−110
−105
−100
−95
−90
−85
−80
0 20 40 60 80 100
Memory CrossTalk
Isolation Crosstalk
f
IN
, Input Frequency (kHz)
Crosstalk (dB)
G034
2.5
3
3.5
4
4.5
5
2.7 3.2 3.7 4.2 4.7 5.2 5.7
AVDD, Analog Supply Voltage (V)
AVDD Dynamic Current (mA)
G001
ADS7945
ADS7946
SBAS539B –JUNE 2011– REVISED SEPTEMBER 2011 www.ti.com
TYPICAL CHARACTERISTICS: ADS7945 (continued)
At T
A
= +25°C, AVDD = 5 V, DVDD = 1.8 V, V
REF
= 2.5 V, and f
SAMPLE
= 2 MSPS, unless otherwise noted.
SFDR vs ANALOG SUPPLY VOLTAGE SFDR vs REFERENCE VOLTAGE
Figure 25. Figure 26.
SFDR vs FREE-AIR TEMPERATURE SFDR vs INPUT FREQUENCY
Figure 27. Figure 28.
ANALOG SUPPLY CURRENT (Dynamic)
CROSSTALK vs INPUT FREQUENCY vs ANALOG SUPPLY VOLTAGE
Figure 29. Figure 30.
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