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AD7402 Scheda tecnica(PDF) 9 Page - Analog Devices

Il numero della parte AD7402
Spiegazioni elettronici  16-Bit, Isolated Sigma-Delta Modulator
PDF  20 Pages
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD7402 Scheda tecnica(HTML) 9 Page - Analog Devices

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Data Sheet
AD7402
Rev. A | Page 9 of 20
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VDD1 = 5 V, VDD2 = 5 V, using sinc3 filter with a 256 oversampling ratio (OSR), unless otherwise noted.
Figure 5. PSRR vs. Supply Ripple Frequency
Figure 6. CMRR vs. Common-Mode Ripple Frequency
Figure 7. SINAD vs. Analog Input Frequency
Figure 8. Fast Fourier Transform (FFT)
Figure 9. Typical DNL Error
Figure 10. Typical INL Error
SUPPLY RIPPLE FREQUENCY (Hz)
–140
–120
–100
–80
–60
–40
–20
0
200mV p-p SINE WAVE ON VDD1
1nF DECOUPLING
10k
100k
1M
COMMON-MODE RIPPLE FREQUENCY (Hz)
–140
–120
–100
–80
–60
–40
–20
0
10k
100k
1M
SINC3 OSR = 256 FILTER
UNFILTERED
ANALOG INPUT FREQUENCY (Hz)
0
10
20
30
40
50
60
70
80
90
5.5V
5V
4.5V
10
100
1k
FREQUENCY (kHz)
–180
–160
–140
–120
–100
–80
–60
–40
–20
0
0
5
10
15
fIN = 35.8Hz
SNR = 87.4dB
SINAD = 86dB
THD = –92dB
CODE (k)
0
10
20
30
40
50
60
70
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
CODE (k)
0
10
20
30
40
50
60
70
–2.0
–1.5
–1.0
–0.5
0
0.5
1.0
1.5
2.0
2.5



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