AD9271 Analog Devices, AD9271 Datasheet - Page 17

• Manufacturer Part Number: AD9271
• Description: Octal LNA/VGA/AAF/ADC and Crosspoint Switch
• Manufacturer: Analog Devices

Specifications of AD9271

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 50MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 0.25 V p-p,0.32 V p-p,0.4 V p-p
• Adc Architecture: Pipelined
• Pkg Type: QFP

2000000
1800000
1600000
1400000
1200000
1000000
1200000
1000000
800000
600000
400000
200000
800000
600000
400000
200000
Figure 24. Output-Referred Noise Histogram with V
Figure 25. Output-Referred Noise Histogram with V
Figure 26. Short-Circuit, Input-Referred Noise vs. Frequency
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
4.5
0
0
0
0
–5
–5
–4
–4
LNA GAIN = 8×
LNA GAIN = 5×
5
–3
–3
–2
–2
FREQUENCY (MHz)
10
–1
–1
CODES
CODES
0
0
15
1
1
LNA GAIN = 6×
2
2
3
3
20
GAIN
GAIN
= 0.0 V
= 1.0 V
4
4
5
5
25
Rev. B | Page 17 of 60
Figure 29. Short-Circuit, Input-Referred Noise vs. Temperature
–131
–132
–133
–134
–135
–136
–137
–138
–139
–140
1.65
1.60
1.55
1.50
1.45
1.40
64.0
63.5
63.0
62.5
62.0
61.5
61.0
60.5
60.0
59.5
1.70
Figure 27. Short-Circuit, Output-Referred Noise vs. V
–40
0
0
Figure 28. SNR/SINAD vs. V
0.1
0.1
–20
SNR (dBFS)
SINAD (dBFS)
0.2
0.2
0.3
0.3
0
TEMPERATURE (°C)
0.4
0.4
V
V
GAIN
GAIN
20
0.5
0.5
LNA GAIN = 6×
GAIN
(V)
(V)
, AIN = −6.5 dBFS
0.6
0.6
40
0.7
0.7
LNA GAIN = 8×
LNA GAIN = 5×
0.8
60
0.8
AD9271
GAIN
0.9
0.9
80
1.0
1.0