Datasheet
80
82
84
86
88
90
92
94
96
98
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
G063
80
82
84
86
88
90
92
94
96
98
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
G065
80
82
84
86
88
90
92
94
96
98
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
G064
80
82
84
86
88
90
92
94
96
98
100
0 20 40 60 80 100
f
IN
, Input Frequency (kHz)
Spurious Free Dynamic Range (dB)
AVDD = 3 V
G066
−140
−120
−100
−80
−60
−40
−20
0
20 40 60 80 100
Memory Crosstalk
Isolation Crosstalk
f
IN
, Input Frequency (kHz)
Crosstalk (dB)
G071
2
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)
G038
ADS7945
ADS7946
www.ti.com
SBAS539B –JUNE 2011– REVISED SEPTEMBER 2011
TYPICAL CHARACTERISTICS: ADS7946 (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 62. Figure 63.
SFDR vs FREE-AIR TEMPERATURE SFDR vs INPUT FREQUENCY
Figure 64. Figure 65.
ANALOG SUPPLY CURRENT (Dynamic)
CROSSTALK vs INPUT FREQUENCY vs ANALOG SUPPLY VOLTAGE
Figure 66. Figure 67.
Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 21
Product Folder Link(s): ADS7945 ADS7946