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AD9480 датащи(PDF) 16 Page - Analog Devices

номер детали AD9480
подробное описание детали  8-Bit, 250 MSPS 3.3 V A/D Converter
PDF  28 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD9480 датащи(HTML) 16 Page - Analog Devices

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AD9480
Rev. 0 | Page 16 of 28
SFDR
SNR
SINAD
SAMPLE CLOCK (MHz)
75
70
65
60
55
50
45
40
0
50
150
200
100
250
300
Figure 26. SNR, SINAD, SFDR vs. Sample Clock Frequency,
AIN = 70 MHz
−1 dBFS
ANALOG INPUT DRIVE LEVEL (dBFS)
80
60
70
40
50
20
30
0
10
–70
–60
–40
–50
–30
–20
–10
0
SFDRdBFS
SFDRdBc
65dB
REF LINE
Figure 27. SFDR vs. AIN Input Level; AIN = 70 MHz at 250 MSPS
MHz
0
–20
–10
–50
–40
–30
–70
–60
–90
–80
060
40
20
80
100
120
F1, F2 = –7dBFS
2F2-F1 = –71.1dBc
2F1-F2 = –68dBc
Figure 28. Two-Tone Intermodulation Distortion
(69.3 MHz and 70.3 MHz; fS = 250 MSPS)
ENCODE (MSPS)
180
160
100
120
140
60
40
20
80
0
0
50
100
200
250
150
300
IAVDD
IDRVDD
Figure 29. IAVDD and IDRVDD vs. Clock Rate, CLOAD = 5 pF
AIN = 70 MHz @ –1 dBFS
DCS OFF
DCS ON
CLOCK POSITIVE DUTY CYCLE (%)
50
49
48
47
46
45
43
42
41
44
40
20
30
40
50
60
70
80
Figure 30. SNR, SINAD vs. Clock Pulse Width High,
AIN = 70 MHz @ –1 dBFS, 250 MSPS, DCS On/Off
EXTERNAL VREF VOLTAGE (V)
50.0
47.5
45.0
42.5
40.0
0.5
1.1
0.9
0.7
1.5
1.3
1.7
1.9
SNR
SFDR
50
65
70
75
80
SINAD
Figure 31. SNR, SINAD, and SFDR vs. VREF in External Reference Mode,
AIN = 70 MHz @ –1 dBFS, 250 MSPS



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