AD7720 Ver la hoja de datos (PDF) - Analog Devices
Número de pieza
componentes Descripción
Fabricante
AD7720 Datasheet PDF : 16 Pages
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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 14. Integral Nonlinearity Error
AD7720
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
6.25
FREQUENCY – MHz
Figure 15. Modulator Output (0 Hz to MCLK/2)
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
–130
0
FREQUENCY – kHz
393.295 kHz
Figure 18. Modulator Output (0 to 393.295 kHz)
0
–20
–40
–60
–80
–100
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
–120
–140
–154
0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3
Figure 16. 16K Point FFT
0
–20
AIN = 90kHz
CLKIN = 12.5 MHz
–40
SNR = 89.6dB
S/(N+D) = 89.6dB
–60
SFDR = –108.0dB
–80
–100
–120
–140
–154
0E+0 10E+3 20E+3 30E+3 40E+3 50E+3 60E+3 70E+3 80E+3 90E+3 98E+3
Figure 19. 16K Point FFT
0
–20
–40
–60
–80
–100
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
–120
–140
–154
0E+0
10E+3 20E+3 30E+3 40E+3 50E+3 60E+3
70E+3
80E+3 90E+3 96E+3
Figure 17. 16K Point FFT
0
–20
AIN = 90kHz
XTAL = 12.288MHz
–40
SNR = 88.1dB
S/(N+D) = 88.1dB
–60
SFDR = –103.7dB
–80
–100
–120
–140
–154
0E+0
10E+3
20E+3 30E+3
40E+3 50E+3 60E+3
70E+3
80E+3 90E+3 96E+3
Figure 20. 16K Point FFT
REV. 0
–9–
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