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AD7321 数据表(PDF) 12 Page - Analog Devices

部件名 AD7321
功能描述  2-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
PDF  37 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7321 数据表(HTML) 12 Page - Analog Devices

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Data Sheet
AD7321
Rev. B | Page 11 of 36
–50
–100
10
1000
ANALOG INPUT FREQUENCY (kHz)
100
–55
–60
–65
–70
–75
–80
–85
–90
–95
0V TO +10V SE
0V TO +10V DIFF
±10V DIFF
±10V SE
±2.5V SE
±2.5V DIFF
±5V DIFF
±5V SE
VCC =VDRIVE =3V
VDD/VSS =±12V
TA = 25°C
fS = 500kSPS
INTERNAL REFERENCE
Figure 10. THD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 3 V VCC
–50
–100
10
1000
ANALOG INPUT FREQUENCY (kHz)
100
–55
–60
–65
–70
–75
–80
–85
–90
–95
VCC =VDRIVE =5V
VDD/VSS = ±12V
TA =25°C
fS = 500kSPS
INTERNAL REFERENCE
0V TO +10V SE
±10V SE
±10V DIFF
0V TO +10V DIFF
±5V SE
±5V DIFF
±2.5V SE
±2.5V DIFF
Figure 11. THD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 5 V VCC
80
50
10
1000
ANALOG INPUT FREQUENCY (kHz)
100
75
70
65
60
55
VCC =VDRIVE =3V
VDD/VSS = ±12V
TA =25°C
fS = 500kSPS
INTERNAL REFERENCE
±5V DIFF
±2.5V DIFF
±5V SE
±2.5V SE
0V TO +10V DIFF
±10V DIFF
±10V SE
0V TO +10V SE
Figure 12. SINAD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 3 V VCC
80
50
10
1000
ANALOG INPUT FREQUENCY (kHz)
100
75
70
65
60
55
VCC =VDRIVE =5V
VDD/VSS = ±12V
TA =25°C
fS = 500kSPS
INTERNAL REFERENCE
±10V SE
0V TO +10V SE
±10V DIFF
±2.5V SE
±5V SE
±2.5V DIFF
±5V DIFF
0V TO +10V DIFF
Figure 13. SINAD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 5 V VCC
–50
–95
0
600
FREQUENCY OF INPUT NOISE (kHz)
–55
–60
–65
–70
–75
–80
–85
–90
100
200
300
400
500
VDD/VSS =±12V
SINGLE-ENDED MODE
fS = 500kSPS
TA = 25°C
50kHz ON SELECTED CHANNEL
VCC =3V
VCC =5V
Figure 14. Channel-to-Channel Isolation
10k
0
–2
CODE
9k
8k
7k
6k
5k
4k
3k
2k
1k
–1
0
1
2
0
228
9469
303
0
VCC =5V
VDD/VSS = ±12V
RANGE = ±10V
10k SAMPLES
TA = 25°C
Figure 15. Histogram of Codes, True Differential Mode



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