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AD9268 数据表(PDF) 23 Page - Analog Devices

部件名 AD9268
功能描述  1.8 V Dual Analog-to-Digital Converter (ADC)
PDF  45 Pages
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制造商  AD [Analog Devices]
网页  http://www.analog.com
标志 AD - Analog Devices

AD9268 数据表(HTML) 23 Page - Analog Devices

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AD9268
Rev. A | Page 22 of 44
0
–20
–40
–60
–80
–100
–120
–140
0
10
2030
4050
60
FREQUENCY (MHz)
125MSPS
70.1MHz @ –6dBFS
SNR = 72.2dB (78.2dBFS)
SFDR = 97dBc
SECOND HARMONIC
THIRD HARMONIC
Figure 38. AD9268-125 Single-Tone FFT with fIN = 70.1 MHz @ −6 dBFS
with Dither Enabled
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
–150
FREQUENCY (MHz)
SECOND HARMONIC
THIRD HARMONIC
0
6
12
18
24
30
36
42
48
54
60
125MSPS
70.1MHz @ –23dBFS
SNR = 56.8dB (79.8dBFS)
SFDR = 67.7dBc
Figure 39. AD9268-125 Single-Tone FFT with fIN = 70.1 MHz @ −23 dBFS
with Dither Disabled, 1M Sample
0
6
12
18
24
30
36
42
48
54
60
FREQUENCY (MHz)
SECOND HARMONIC
THIRD HARMONIC
0
–15
–30
–45
–60
–75
–90
–105
–120
–135
–150
125MSPS
70.1MHz @ –23dBFS
SNR = 56.2dB (57.2dBFS)
SFDR = 86.6dBc
Figure 40. AD9268-125 Single-Tone FFT with fIN = 70.1 MHz @ −23 dBFS
with Dither Enabled, 1M Sample
120
100
80
60
40
20
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
INPUT AMPLITUDE (dBFS)
SNR (dBFS)
SFDR (dBc)
SNR (dBc)
SFDR (dBFS)
Figure 41. AD9268-125 Single-Tone SNR/SFDR vs. Input Amplitude (AIN)
with fIN = 2.4 MHz
120
100
80
60
40
20
0
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
INPUT AMPLITUDE (dBFS)
SNR (dBFS)
SFDR (dBc)
SFDR (dBFS)
SNR (dBc)
Figure 42. AD9268-125 Single-Tone SNR/SFDR vs. Input Amplitude (AIN)
with fIN = 98.12 MHz
120
110
100
90
80
70
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
INPUT AMPLITUDE (dBFS)
SNR (DITHER ON)
SNR (DITHER OFF)
SFDR (DITHER ON)
SFDR (DITHER OFF)
Figure 43. AD9268-125 Single Tone SNR/SFDR vs. Input Amplitude (AIN)
with fIN = 30 MHz with and without Dither Enabled



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