Datasheet

74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
-40
125
Free-AirTemperature( C)°
Signal-to-NoiseRatio(dB)
-25 205-10 35 50 65 80 95 110
AVDD=3V
f =2kHz
IN
74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
2.7
5.7
AVDD,AnalogSupplyVoltage(V)
Signal-to-NoiseRatio(dB)
3.2 4.7
f =2kHz
IN
4.23.7 5.2
74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
2.5
5
ReferenceVoltage(V)
Signal-to-NoiseRatio(dB)
3 4
AVDD=5V
f =2kHz
IN
3.5 4.5
74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
0
120
Frequency(kHz)
Signal-to-NoiseRatio(dB)
20 6040 10080
AVDD=3V
Throughput=2MSPS
74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
-40
125
Free-AirTemperature( C)°
Signal-to-NoiseandDistortion(dB)
-25 20
AVDD=3V
f =2kHz
IN
5-10 35 50 65 80 95 110
74
73.8
73.6
73.4
73.2
73
72.8
72.6
72.4
72.2
72
2.7
5.7
AVDD,AnalogSupplyVoltage(V)
Signal-to-NoiseandDistortion(dB)
3.2 4.7
f =2kHz
IN
4.23.7 5.2
ADS7947
ADS7948
ADS7949
SLAS708 –SEPTEMBER 2010 www.ti.com
TYPICAL CHARACTERISTICS: ADS7947 (12-Bit) (continued)
At T
A
= +25°C, DVDD = 1.8V, V
REF
= 2.5V, and f
SAMPLE
= 2MSPS, unless otherwise noted.
SNR vs ANALOG SUPPLY VOLTAGE SNR vs TEMPERATURE
Figure 18. Figure 19.
SNR vs REFERENCE VOLTAGE SNR vs INPUT FREQUENCY
Figure 20. Figure 21.
SINAD vs ANALOG SUPPLY VOLTAGE SINAD vs TEMPERATURE
Figure 22. Figure 23.
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