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AD7724AST 数据表(PDF) 8 Page - Analog Devices

部件名 AD7724AST
功能描述  Dual CMOS Modulators
PDF  14 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD7724AST 数据表(HTML) 8 Page - Analog Devices

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REV. A
AD7724
–8–
(AVDD = DVDD = 5.0 V, TA = 25 C; CLKIN = 13 MHz ac-coupled sine wave, AIN = 20 kHz, Bipolar Mode; VIN(+) = 0 V to 2.5 V, VIN(–) = 1.25 V
unless otherwise noted)
INPUT LEVEL – dB
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
–85
–90
–115
0
20
100
40
60
80
–95
–100
–105
–110
THD
SNR
SFDR
VIN (+) = VIN(–) = 1.25V p-p
VCM = 2.5V
Figure 8. SNR, THD, and SFDR vs.
Input Frequency
TEMPERATURE – °C
–94
–116
–50
–25
100
025
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
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
84
92
85
88
89
90
91
86
87
0
50
300
100
150
200
250
AIN = 1/5
· BW
VIN (+) = VIN(–) = 1.25V p-p
VCM = 2.5V
Figure 9. S/(N+D) vs. Output Sample
Rate
CODES
5000
0
n–3
n–2
n+3
n–1
n
n+1
n+2
4500
2000
1500
1000
500
4000
3500
2500
3000
VIN(+) = VIN(–)
CLKIN = 13MHz
8k SAMPLES
Figure 12. Histogram of Output Codes
with DC Input
INPUT FREQUENCY – kHz
–85
–90
–115
0
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
Figure 10. SNR vs. Temperature
CODE
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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