EVAL-AD7944EBZ データシートの表示（PDF） - Analog Devices
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EVAL-AD7944EBZ Datasheet PDF : 28 Pages
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AD7944
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
fS = 2.5MSPS
fIN = 20kHz
SNR = 84.65dB
THD = –100dB
SINAD = 84.5dB
250
500
750
1000
1250
FREQUENCY (kHz)
Figure 11. FFT Plot (External Reference)
84
15.0
SNR
83
14.5
SINAD
82
14.0
81
13.5
ENOB
80
13.0
79
12.5
78
12.0
2.5
3.0
3.5
4.0
4.5
5.0
REFERENCE VOLTAGE (V)
Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage
85.0
84.5
84.0
83.5
83.0
82.5
82.0
81.5
81.0
80.5
80.0
1
10
100
FREQUENCY (kHz)
Figure 13. SINAD vs. Frequency
1000
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
fS = 2.5MSPS
fIN = 20kHz
SNR = 84dB
THD = –102dB
SINAD = 84dB
250
500
750
1000
1250
FREQUENCY (kHz)
Figure 14. FFT Plot (Internal Reference)
–100
–101
–102
–103
–104
–105
2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00
REFERENCE VOLTAGE (V)
Figure 15. THD vs. Reference Voltage
–80
–85
–90
–95
–100
–105
–110
1
10
100
FREQUENCY (kHz)
1000
Figure 16. THD vs. Frequency
Rev. 0 | Page 10 of 28
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