Datasheet

75
77
79
81
83
85
2.7 3.2 3.7 4.2 4.7 5.2 5.7
AVDD, Analog Supply Voltage (V)
Signal−to−Noise Ratio (dB)
f
IN
= 20 kHz
G018
75
77
79
81
83
85
2.5 3 3.5 4 4.5 5 5.5
Reference Voltage (V)
Signal−to−Noise Ratio (dB)
AVDD = 5.25 V
f
IN
= 20 kHz
G020
75
77
79
81
83
85
−40 −25 −10 5 20 35 50 65 80 95 110 125
Free-Air Temperature (°C)
Signal−to−Noise Ratio (dB)
f
IN
= 20 kHz
G019
75
77
79
81
83
85
0 20 40 60 80 100
f
IN
, Input Frequency (kHz)
Signal−to−Noise Ratio (dB)
G021
75
77
79
81
83
85
2.7 3.2 3.7 4.2 4.7 5.2 5.7
AVDD, Analog Supply Voltage (V)
Signal−to−Noise and Distortion (dB)
f
IN
= 20 kHz
G022
75
77
79
81
83
85
2.5 3 3.5 4 4.5 5 5.5
Reference Voltage (V)
Signal−to−Noise and Distortion (dB)
AVDD = 5.25 V
f
IN
= 20 kHz
G024
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.
SNR vs ANALOG SUPPLY VOLTAGE SNR vs REFERENCE VOLTAGE
Figure 13. Figure 14.
SNR vs FREE-AIR TEMPERATURE SNR vs INPUT FREQUENCY
Figure 15. Figure 16.
SINAD vs ANALOG SUPPLY VOLTAGE SINAD vs REFERENCE VOLTAGE
Figure 17. Figure 18.
12 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS7945 ADS7946