ADS8578S Datasheet, PDF (18/58 Pages) Texas Instruments – 14-Bit, High-Speed, 8-Channel, Simultaneous-Sampling ADC with Bipolar Inputs on a Single Supply

ADS8578S
SBAS825 – APRIL 2017
www.ti.com
7.20 Typical Characteristics
at T_A = 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V_REF = 2.5 V, and f_S = 200 kSPS per channel (unless otherwise
noted)
15
25 C
-40 C
9
125 C
3
-3
-9
-15
-10
-6
-2
2
6
Input Voltage (V)
10
D002
9
25 C
-40 C
6
125 C
3
0
-3
-6
-9
-5
-3
-1
1
3
5
Input Voltage (V)
D003
Figure 10. Analog Input Current vs Input Voltage Over
Temperature (±10 V)
1.05
± 10 V
±5V
1.03
Figure 11. Analog Input Current vs Input Voltage Over
Temperature (±5 V)
70000
56000
1.01
42000
0.99
28000
0.97
14000
0.95
-40
-7
26
59
92
Free-Air Temperature (qC)
125
D004
Figure 12. Input Impedance vs Temperature
70000
0
-1
0
Output Codes
D009
Mean = –0.012, sigma = 0.11, number of hits = 65536, V_IN = 0 V
Figure 13. DC Histogram of Codes (±10 V)
0.5
56000
0.3
42000
0.1
28000
-0.1
14000
-0.3
0
-1
0
Output Codes
D010
Mean = –0.001, sigma = 0.04, number of hits = 65536, V_IN = 0 V
Figure 14. DC Histogram of Codes (±5 V)
-0.5
-8192
-4096
0
Codes (LSB)
4096
Figure 15. DNL for All Codes
8191
D015
18
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