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參數(shù)資料
| 型號： | AD7724 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Dual CMOS Modulators |
| 中文描述： | 調(diào)制器雙通道CMOS |
| 文件頁數(shù)： | 8/14頁 |
| 文件大小： | 552K |
| 代理商： | AD7724 |
REV. A
AD7724
(AVDD = DVDD = 5.0 V, T
A
= 25
8
C; CLKIN = 13 MHz ac-coupled sine wave, AIN = 20 kHz, Bipolar Mode; V
IN
(+) = 0 V to 2.5 V, V
IN
(–) = 1.25 V
unless otherwise noted)
–8–
INPUT LEVEL – dB
d
110
100
50–40
–30
0
–20
–10
90
80
70
60
SFDR
S/(N+D)
Figure 5. S/(N+D) and SFDR vs.
Analog Input Level
INPUT FREQUENCY – kHz
d
–85
–90
–1150
20
100
40
60
80
–95
–100
–105
–110
THD
SNR
SFDR
V
IN
(+) = V
IN
(–) = 1.25V p-p
V
CM
= 2.5V
Figure 8. SNR, THD, and SFDR vs.
Input Frequency
TEMPERATURE – °C
d
–94
–116
–50
–25
100
0
25
50
75
–96
–108
–110
–112
–114
–100
–102
–106
–104
–98
THD
3RD
4TH
2ND
Figure 11. THD vs. Temperature
–Typical Performance Characteristics
OUTPUT DATA RATE – kSPS
d
84
92
85
88
89
90
91
86
87
0
50
300
100
150
200
250
AIN = 1/5
·
BW
Figure 6. S/(N+D) vs. Output Sample
Rate
OUTPUT DATA RATE – kSPS
d
84
92
85
88
89
90
91
86
87
0
50
300
100
150
200
250
AIN = 1/5
·
BW
V
IN
(+) = V
IN
(–) = 1.25V p-p
V
CM
= 2.5V
Figure 9. S/(N+D) vs. Output Sample
Rate
CODES
F
5000
0
n–3
n–2
n+3
n–1
n
n+1
n+2
4500
2000
1500
1000
500
4000
3500
2500
3000
V
IN
(+) = V
IN
(–)
CLKIN = 13MHz
8k SAMPLES
Figure 12. Histogram of Output Codes
with DC Input
INPUT FREQUENCY – kHz
d
–85
–90
–1150
20
100
40
60
80
–95
–100
–105
–110
SNR
SFDR
THD
Figure 7. SNR, THD, and SFDR vs.
Input Frequency
TEMPERATURE – °C
92.0
91.5
88.0
–50
0
100
50
90.0
89.5
88.5
89.0
91.0
90.5
d
Figure 10. SNR vs. Temperature
CODE
D
1.0
0.8
–1.0
0
20000
65535
40000
–0.4
–0.8
–0.6
0
–0.2
0.6
0.2
0.4
Figure 13. Differential Nonlinearity
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