Datasheet

70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
2.7 3.2 3.7 4.2 4.7 5.2 5.7
AVDD (V)
Signal-to-Noise Ratio (dB)
G037
70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
±2.5V ±5V ±10V 0−5V 0−10V
Signal Range
Signal-to-Noise Ratio (dB)
G038
70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
2 2.2 2.4 2.6 2.8 3
Reference Voltage (V)
Signal-to-Noise Ratio (dB)
G039
70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
0 1 2 3 4 5 6 7
Channel Number
Signal-to-Noise Ratio (dB)
G040
70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
−40 −25 −10 5 20 35 50 65 80 95 110 125
Free-Air Temperature (°C)
Signal-to-Noise Ratio (dB)
G041
70
70.2
70.4
70.6
70.8
71
71.2
71.4
71.6
71.8
72
2.5 5 7.5 10 12.5 15
HVDD, Positive High-Voltage Supply (V)
Signal-to-Noise Ratio (dB)
G042
ADS8634
ADS8638
SBAS541A –MAY 2011– REVISED AUGUST 2011 www.ti.com
TYPICAL CHARACTERISTICS (continued)
At T
A
= +25°C, internal reference = 2.5V, channel 0, range = ±2.5V, AVDD = 2.7V, DVDD = 1.8V, HVDD = 10V, HVSS
= –10V, and f
SAMPLE
= 1MSPS, unless otherwise noted.
SNR vs ANALOG SUPPLY VOLTAGE SNR vs SIGNAL RANGE
Figure 27. Figure 28.
SNR vs REFERENCE VOLTAGE SNR vs CHANNEL NUMBER
Figure 29. Figure 30.
SNR vs FREE-AIR TEMPERATURE SNR vs POSITIVE HIGH-VOLTAGE SUPPLY
Figure 31. Figure 32.
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