AD7722(Rev0) Просмотр технического описания (PDF) - Analog Devices
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AD7722 Datasheet PDF : 24 Pages
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Typical Characteristics–AD7722
(AVDD = DVDD = 5.0 V, TA = +25؇C; CLKIN = 12.5 MHz, AIN = 20 kHz, Bipolar Mode; VIN(+) = 0 V to 2.5 V, VIN(–) = 1.25 V unless otherwise noted)
110
100
90
SFDR
80
S/ (N+D)
70
60
50
–40
–30
–20
–10
0
INPUT LEVEL – dB
84
85
AIN = 1/5 · BW
86
87
88
89
90
91
92
0
50 100 150 200 250 300
OUTPUT DATA RATE – kSPS
–85
–90
–95
–100
–105
–110
–115
0
SNR
SFDR
THD
20
40
60
80
100
INPUT FREQUENCY – kHz
Figure 9. S/(N+D) and SFDR vs.
Analog Input Level
Figure 10. S/(N+D) vs. Output
Sample Rate
Figure 11. SNR, THD, and SFDR vs.
Input Frequency
–85
–90
SNR
–95
–100 THD
VIN (+) = VIN(–) = 1.25Vpk–pk
VCM = 2.5V
–105
SFDR
–110
–115
0
20
40
60
80
100
INPUT FREQUENCY – kHz
Figure 12. SNR, THD, and SFDR vs.
Input Frequency
84
85
AIN = 1/5 · BW
86
VIN (+) = VIN(–) = 1.25Vpk–pk
VCM = 2.5V
87
88
89
90
91
92
0
50 100 150 200 250 300
OUTPUT DATA RATE – kSPS
Figure 13. S/(N+D) vs. Output
Sample Rate
92.0
91.5
91.0
90.5
90.0
89.5
89.0
88.5
88.0
–50
0
50
100
TEMPERATURE – °C
Figure 14. SNR vs. Temperature
–94
–96
–98
–100
–102
–104
–106
–108
–110
–112
–114
–116
–50
THD
3RD
4TH
2ND
–25
0
25
50 75 100
TEMPERATURE – °C
Figure 15. THD vs. Temperature
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0
n–3 n–2
VIN(+) = VIN(–)
CLKIN = 12.5MHz
8k SAMPLES
n–1 n n+1 n+2 n+3
CODES
Figure 16. Histogram of Output
Codes with DC Input
1.0
0.8
0.6
0.4
0.2
0
–0.2
–0.4
–0.6
–0.8
–1.0
0
20000
40000
CODE
65535
Figure 17. Differential Nonlinearity
REV. 0
–11–
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