AD9272 Analog Devices, AD9272 Datasheet - Page 17
AD9272
Manufacturer Part Number
AD9272
Description
Octal LNA/VGA/AAF/ADC and Crosspoint Switch
Manufacturer
Analog Devices
Datasheet
1.AD9272.pdf
(44 pages)
Specifications of AD9272
Resolution (bits)
12bit
# Chan
8
Sample Rate
80MSPS
Interface
LVDS,Ser
Analog Input Type
SE-Uni
Ain Range
367 mV p-p,550 mV p-p,733 mV p-p
Adc Architecture
Pipelined
Pkg Type
QFP
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Figure 18. Second-Order Harmonic Distortion vs. Frequency, AIN = −1 dBFS
Figure 19. Third-Order Harmonic Distortion vs. Frequency, AIN = −1 dBFS
150
125
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
75
50
25
Figure 17. Antialiasing Filter (AAF) Group Delay Response
0
0
0
0
0
0
GAIN+ = 1.0V
GAIN+ = 0.4V
5
2
2
GAIN+ = 1.6V
GAIN+ = 0.8V
GAIN+ = 0V
10
4
4
INPUT FREQUENCY (MHz)
INPUT FREQUENCY (MHz)
FREQUENCY (MHz)
15
6
6
GAIN+ = 0.4V
20
8
8
GAIN+ = 1.6V
GAIN+ = 1.0V
25
10
10
GAIN+ = 1.6V
30
12
12
35
14
14
40
16
16
Rev. C | Page 17 of 44
Figure 21. Third-Order Harmonic Distortion vs. ADC Output Level
–100
–120
Figure 20. Second-Order Harmonic Distortion vs. ADC Output
–100
–120
–20
–40
–60
–80
–10
–20
–30
–40
–50
–60
–70
–80
–90
–20
–40
–60
–80
0
0
–50
0
–40
0.4
f
A
IN2
IN1
–35
=
= –1dBFS, A
0.6
f
IN1
–40
+ 0.01MHz
–30
Figure 22. IMD3 vs. GAIN+
ADC OUTPUT LEVEL (dBFS)
ADC OUTPUT LEVEL (dBFS)
0.8
IN2
–25
–30
= –21dBFS
GAIN+ = 0V
GAIN+ (V)
GAIN+ = 0V
–20
1.0
2.3MHz
–20
–15
1.2
5MHz
–10
GAIN+ = 1.6V
–10
GAIN+ = 0.8V
GAIN+ = 1.6V
GAIN+ = 0.8V
1.4
–5
AD9272
8MHz
1.6
0
0