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AD7724AST Datenblatt(PDF) 8 Page - Analog Devices

Teilenummer AD7724AST
Bauteilbeschribung  Dual CMOS Modulators
PDF  14 Pages
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7724AST Datenblatt(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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