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AD7403 Datenblatt(PDF) 11 Page - Analog Devices

Teilenummer AD7403
Bauteilbeschribung  16-Bit, Isolated Sigma-Delta Modulator
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Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD7403 Datenblatt(HTML) 11 Page - Analog Devices

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AD7403
Data Sheet
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25°C, VDD1 = 5 V, VDD2 = 5 V, VIN+ = −250 mV to +250 mV, VIN− = 0 V, fMCLKIN = 20 MHz, using a sinc3 filter with a 256 oversampling
ratio (OSR), unless otherwise noted.
–120
–100
–80
–60
–40
–20
0
200mV p-p SINE WAVE ON VDD1
1nF DECOUPLING
MCLKIN = 20MHz
MCLKIN = 10MHz
SUPPLY RIPPLE FREQUENCY (Hz)
0
200k
400k
600k
800k
1M
Figure 7. AD7403 PSRR vs. Supply Ripple Frequency
SUPPLY RIPPLE FREQUENCY (Hz)
–140
–120
–100
–80
–60
–40
–20
0
0
200k
400k
600k
800k
1M
200mV p-p SINE WAVE ON VDD1
1nF DECOUPLING
MCLKIN = 20MHz
MCLKIN = 10MHz
Figure 8. AD7403-8 PSRR vs. Supply Ripple Frequency
–140
–120
–100
–80
–60
–40
–20
0
100
1k
10k
100k
1M
RIPPLE FREQUENCY (Hz)
SHORTED INPUTS
200mV p-p SINE WAVE ON INPUTS
MCLKIN = 20MHz, SINC3 DECIMATION RATE = 256
MCLKIN = 10MHz, SINC3 DECIMATION RATE = 256
MCLKIN = 20MHz, UNFILTERED
MCLKIN = 10MHz, UNFILTERED
Figure 9. CMRR vs. Common-Mode Ripple Frequency
70
72
74
76
78
80
82
84
86
88
90
100
1k
10k
ANALOG INPUT FREQUENCY (Hz)
16MHz MCLKIN, VDD1 = 4.5V
16MHz MCLKIN, VDD1 = 5.0V
16MHz MCLKIN, VDD1 = 5.5V
20MHz MCLKIN, VDD1 = 4.5V
20MHz MCLKIN, VDD1 = 5.0V
20MHz MCLKIN, VDD1 = 5.5V
Figure 10. SINAD vs. Analog Input Frequency
–160
–140
–120
–100
–80
–60
–40
–20
0
0
5
10
15
20
25
30
FREQUENCY (kHz)
SNR = 88.6dB
fIN = 1kHz
SINAD = 88.3dB
THD = –100.5dB
Figure 11. Typical Fast Fourier Transform (FFT)
0
10
20
30
40
50
60
CODE (k)
–1.0
–0.8
–0.6
–0.4
–0.2
0
0.2
0.4
0.6
0.8
1.0
Figure 12. Typical DNL Error
Rev. B | Page 10 of 24


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