Datasheet
Data Sheet AD7321
Rev. B | Page 11 of 36
–
50
–100
10
1000
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
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
V
CC
=V
DRIVE
=3V
V
DD
/V
SS
=±12V
T
A
= 25°C
f
S
= 500kSPS
INTERNAL REFERENCE
05399-060
Figure 10. THD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 3 V V
CC
–
50
–100
10
1000
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
100
–55
–60
–65
–70
–75
–80
–85
–90
–95
V
CC
=V
DRIVE
=5V
V
DD
/V
SS
= ±12V
T
A
=25°C
f
S
= 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
05399-061
Figure 11. THD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 5 V V
CC
80
50
10
1000
ANALOG INPUT FREQUENCY (kHz)
SINAD (dB)
100
75
70
65
60
55
V
CC
=V
DRIVE
=3V
V
DD
/V
SS
= ±12V
T
A
=25°C
f
S
= 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
05399-062
Figure 12. SINAD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 3 V V
CC
80
50
10
1000
ANALOG INPUT FREQUENCY (kHz)
SINAD (dB)
100
75
70
65
60
55
V
CC
=V
DRIVE
=5V
V
DD
/V
SS
= ±12V
T
A
=25°C
f
S
= 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
05399-063
Figure 13. SINAD vs. Analog Input Frequency for Single-Ended (SE) and True
Differential Mode (Diff) at 5 V V
CC
–
50
–95
0
600
FREQUENCY OF INPUT NOISE (kHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
–55
–60
–65
–70
–75
–80
–85
–90
100 200 300 400 500
V
DD
/V
SS
=±12V
SINGLE-ENDED MODE
f
S
= 500kSPS
T
A
= 25°C
50kHz ON SELECTED CHANNEL
V
CC
=3V
V
CC
=5V
05399-012
Figure 14. Channel-to-Channel Isolation
10k
0
–2
CODE
NUMBER OF OCCURRENCES
9k
8k
7k
6k
5k
4k
3k
2k
1k
–1 0 1 2
0
228
9469
303
0
V
CC
=5V
V
DD
/V
SS
= ±12V
RANGE = ±10V
10k SAMPLES
T
A
= 25°C
05399-013
Figure 15. Histogram of Codes, True Differential Mode
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.