ADS7945 Datasheet, PDF (15/49 Pages) Texas Instruments – 14-Bit, 2 MSPS, Dual-Channel, Differential/Single-Ended, Ultralow-Power Analog-to-Digital Converters

ADS7945
ADS7946
www.ti.com
SBAS539B – JUNE 2011 – REVISED SEPTEMBER 2011
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.
ANALOG SUPPLY CURRENT (Dynamic)
vs FREE-AIR TEMPERATURE
ANALOG SUPPLY CURRENT (Dynamic)
vs SAMPLE RATE
5
4
3.5
4.5
3
4
2.5
2
AVDD = 5 V
3.5
1.5
1
3
0.5
AVDD = 3 V
2.5
−40 −25 −10
5 20 35 50 65 80
Free-Air Temperature (°C)
Figure 31.
95 110 125
G002
0
0
100 200 300 400 500 600 700
Throughput (kSPS)
G005
Figure 32.
ANALOG SUPPLY CURRENT (Static)
vs ANALOG SUPPLY VOLTAGE
3
ANALOG SUPPLY CURRENT (Static)
vs FREE-AIR TEMPERATURE
3
2.5
2.5
2
2
1.5
1.5
1
2.7
3.2
3.7
4.2
4.7
5.2
5.7
AVDD, Analog Supply Voltage (V)
G003
Figure 33.
DNL
1.5
1
0.5
0
−0.5
−1
0
2048
4096 6144 8192 10240 12288 14336 16384
ADC output Code (LSB)
G037
Figure 35.
1
−40 −25 −10
5 20 35 50 65 80
Free-Air Temperature (°C)
Figure 34.
95 110 125
G004
INL
1.5
1
0.5
0
−0.5
−1
−1.5
0
2048
4096 6144 8192 10240 12288 14336 16384
ADC Output Code (LSB)
G036
Figure 36.
Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s): ADS7945 ADS7946
Submit Documentation Feedback
15