Datasheet

AD7329 Data Sheet
Rev. B | Page 12 of 40
–
50
–95
10
1000
05402-010
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
±2.5V RANGE
0V TO +10V RANGE
±10V RANGE
±5V RANGE
V
CC
= V
DRIVE
= 5V
V
DD
= 12V, V
SS
= –12V
T
A
= 25°C
f
S
= 1MSPS
INTERNAL REFERENCE
AD8021 BETWEEN MUX
OUT+
AND ADC
IN+
PINS
100
–55
–60
–65
–70
–75
–80
–85
–90
Figure 10. THD vs. Analog Input Frequency for Single-Ended Mode at 5 V V
CC
–
50
–95
10
1000
05402-011
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
±2.5V RANGE
0V TO +10V RANGE
±10V RANGE
±5V RANGE
V
CC
= V
DRIVE
= 5V
V
DD
= 12V, V
SS
= –12V
T
A
= 25°C
f
S
= 1MSPS
INTERNAL REFERENCE
AD8021 BETWEEN MUX
OUT
AND ADC
IN
PINS
100
–55
–60
–65
–70
–75
–80
–85
–90
Figure 11. THD vs. Analog Input Frequency for True Differential Mode at 5 V V
CC
74
66
10
1000
05402-012
ANALOG INPUT FREQUENCY (kHz)
SINAD (dB)
±2.5V RANGE
0V TO +10V RANGE
±10V RANGE
±5V RANGE
V
CC
= V
DRIVE
= 5V
V
DD
= 12V, V
SS
= –12V
T
A
= 25°C
f
S
= 1MSPS
INTERNAL REFERENCE
AD8021 BETWEEN MUX
OUT+
AND ADC
IN+
PINS
73
72
71
70
69
68
67
100
Figure 12. SINAD vs. Analog Input Frequency for Single-Ended Mode at 5 V V
CC
SINAD (dB)
75
80
50
10
1000
05402-013
ANALOG INPUT FREQUENCY (kHz)
±2.5V RANGE
0V TO +10V RANGE
±10V RANGE
±5V RANGE
V
CC
= V
DRIVE
= 5V
V
DD
= 12V, V
SS
= –12V
T
A
= 25°C
f
S
= 1MSPS
INTERNAL REFERENCE
AD8021 BETWEEN MUX
OUT
AND ADC
IN
PINS
100
70
65
60
55
Figure 13. SINAD vs. Analog Input Frequency for True Differential Mode at 5 V V
CC
–
50
–100
0
600
05402-014
FREQUENCY OF INPUT NOISE (kHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
100 200 300 400 500
V
DD
= 12V, V
SS
= –12V
V
CC
= V
DRIVE
= 5V
SINGLE-ENDED MODE
50kHz ON SELECTED CHANNEL
f
S
= 1MSPS
T
A
= 25°C
WIRE LINK
WITH AD8021
–55
–60
–65
–70
–75
–80
–85
–90
–95
Figure 14. Channel-to-Channel Isolation with and Without AD8021 Between
the MUX
OUT
+ and ADC
IN
+ Pins
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
= 12V, V
SS
= –12V
RANGE = ±10V
10k SAMPLES
T
A
= 25°C
05402-015
Figure 15. Histogram of Codes, True Differential Mode