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AD7944 데이터시트(PDF) 10 Page - Analog Devices

부품명 AD7944
상세설명  14-Bit, 2.5 MSPS, PulSAR 15.5 mW ADC in LFCSP
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AD7944 데이터시트(HTML) 10 Page - Analog Devices

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AD7944
Rev. 0 | Page 10 of 28
0
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–20
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0
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–180
–160
–140
–120
–100
–80
–60
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FREQUENCY (kHz)
fS = 2.5MSPS
fIN = 20kHz
SNR = 84.65dB
THD = –100dB
SINAD = 84.5dB
fS = 2.5MSPS
fIN = 20kHz
SNR = 84dB
THD = –102dB
SINAD = 84dB
FREQUENCY (kHz)
Figure 11. FFT Plot (External Reference)
Figure 14. FFT Plot (Internal Reference)
12.0
78
2.5
3.0
3.5
4.0
4.5
5.0
SINAD
ENOB
SNR
12.5
13.0
13.5
14.0
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15.0
79
80
81
82
83
84
REFERENCE VOLTAGE (V)
Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage
–105
–104
–103
–102
–101
100
2.50
2.75
3.00
3.25
3.50
3.75
4.00
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4.75
5.00
REFERENCE VOLTAGE (V)
Figure 15. THD vs. Reference Voltage
–110
80.0
80.5
1
10
100
1000
FREQUENCY (kHz)
81.0
81.5
82.0
82.5
83.0
83.5
84.0
84.5
85.0
Figure 13. SINAD vs. Frequency
–105
–100
–95
–90
–85
80
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1000
FREQUENCY (kHz)
Figure 16. THD vs. Frequency


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