AD9272 Analog Devices, AD9272 Datasheet - Page 17

• Manufacturer Part Number: AD9272
• Description: Octal LNA/VGA/AAF/ADC and Crosspoint Switch
• Manufacturer: Analog Devices

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

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