AD9272 Analog Devices, AD9272 Datasheet - Page 16

• 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

AD9272
500k
450k
400k
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250k
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180k
160k
140k
120k
100k
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Figure 13. Short-Circuit, Input-Referred Noise vs. Frequency,
50k
80k
60k
40k
20k
Figure 12. Output-Referred Noise Histogram, GAIN+ = 1.6 V
Figure 11. Output-Referred Noise Histogram, GAIN+ = 0 V
0
0
0
–7 –6 –5
–7 –6 –5
1
2
PGA Gain = 30 dB, GAIN+ = 1.6 V
–4
–4
LNA GAIN = 15.6dB
LNA GAIN = 17.9dB
LNA GAIN = 21.3dB
3
–3
–3 –2
4
–2 –1
FREQUENCY (MHz)
–1
5
CODES
CODES
0
0
6
1
1
2
2
7
3
3
8
4
4
5
5
9
6
6
10
7
7
Rev. C | Page 16 of 44
–126
–128
–130
–132
–134
–136
–138
–140
–10
–15
–20
–25
–5
64
62
60
58
56
54
52
50
0
Figure 14. Short-Circuit, Output-Referred Noise vs. GAIN+
0.4
Figure 16. Antialiasing Filter (AAF) Pass-Band Response,
0
0
Figure 15. SNR/SINAD vs. GAIN+, AIN = −1 dBFS
0.5
0.2
5
0.6
LPF Cutoff = 1 × (1/4.5) × f
0.7 0.8
10
0.4
AD9272-40
SINAD
SNR
FREQUENCY (MHz)
15
0.6
0.9
GAIN+ (V)
GAIN+ (V)
1.0
20
0.8
LNA GAIN = 8×
AD9272-65
1.1
25
1.0
SAMPLE
1.2 1.3
AD9272-80
LNA GAIN = 12×
30
1.2
LNA GAIN = 6×
1.4
35
1.4
1.5 1.6
40
1.6