EVAL-AD7985EBZ(Rev0) Просмотр технического описания (PDF) - Analog Devices
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EVAL-AD7985EBZ Datasheet PDF : 28 Pages
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AD7985
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
fS = 2.5MSPS
fIN = 20kHz
SNR = 89.87dB
THD = –102.76dB
SINAD = 89.66dB
250
500
750
1000
1250
FREQUENCY (kHz)
Figure 11. FFT Plot (External Reference)
100
16
95
15
ENOB
SNR
90
14
SINAD
85
13
80
12
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 12. SNR, SINAD, and ENOB vs. Reference Voltage
95
90
85
80
75
70
65
1
10
100
1000
FREQUENCY (kHz)
Figure 13. SINAD vs. Frequency
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
fS = 2.5MSPS
fIN = 20kHz
SNR = 88.45dB
THD = –103.42dB
SINAD = 88.32dB
250
500
750
1000
1250
FREQUENCY (kHz)
Figure 14. FFT Plot (Internal Reference)
–90
100
–95
95
SFDR
–100
90
–105
85
THD
–110
80
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 and SFDR vs. Reference Voltage
–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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