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AD7722AS Datasheet(PDF) 12 Page - Analog Devices

Part # AD7722AS
Description  16-Bit, 195 kSPS CMOS, Sigma-Delta ADC
PDF  24 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7722AS Datasheet(HTML) 12 Page - Analog Devices

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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 18. Integral Nonlinearity Error
–12–
REV. 0
(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)
AD7722–Typical Characteristics
CLKIN FREQUENCY – MHz
200
0
0
2.5
15
5
7.5
10
12.5
180
80
60
40
20
160
140
100
120
AIDD
DIDD
Figure 21. Power Consumption vs.
CLKIN Frequency
0
–154
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3 20E+3 30E+3
40E+3
50E+3 60E+3
70E+3 80E+3
98E+3
CLKIN = 12.5MHz
SNR = 90.1dB
S/(N+D) = 89.2dB
SFDR = –99.5dB
THD = –96.6dB
2ND = –100.9dB
3RD = –106.0dB
4TH = –99.5dB
90E+3
Figure 19. 16K Point FFT
0
–154
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3
20E+3
30E+3
40E+3
50E+3
60E+3
70E+3
80E+3
96E+3
90E+3
XTAL = 12.288MHz
SNR = 89.0dB
S/(N+D) = 87.8dB
SFDR = –94.3dB
THD = –93.8dB
2ND = –94.3dB
3RD = –108.5dB
4TH = –105.7dB
Figure 20. 16K Point FFT
0
–154
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3
20E+3
30E+3
40E+3
50E+3
60E+3
70E+3
80E+3
98E+3
AIN = 90kHz
CLKIN = 12.5 MHz
SNR = 89.6dB
S/(N+D) = 89.6dB
SFDR = –108.0dB
90E+3
Figure 22. 16K Point FFT
0
–154
–20
–80
–100
–120
–140
–40
–60
0E+0
10E+3
20E+3
30E+3
40E+3
50E+3
60E+3
70E+3
80E+3
96E+3
AIN = 90kHz
XTAL = 12.288MHz
SNR = 88.1dB
S/(N+D) = 88.1dB
SFDR = –103.7dB
90E+3
Figure 23. 16K Point FFT



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