Datasheet

AD9271
Rev. B | Page 17 of 60
06304-022
CODES
NUMBER OF HITS
–5 –4 –3 –2 –1 0 1 2 3 4 5
0
200000
06304-023
CODES
–5 –4 –3 –2 –1 0 1 2 3 4 5
0
400000
600000
800000
1000000
1200000
1400000
1600000
1800000
2000000
Figure 24. Output-Referred Noise Histogram with V
GAIN
= 0.0 V
NUMBER OF HITS
200000
400000
600000
800000
1000000
1200000
Figure 25. Output-Referred Noise Histogram with V
GAIN
= 1.0 V
06304-025
FREQUENCY (MHz)
0 5 10 15 20 25
0
0.5
INPUT-REFERRED NOISE (nV/ Hz)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
LNA GAIN = 5×
LNA GAIN = 8×
LNA GAIN = 6×
Figure 26. Short-Circuit, Input-Referred Noise vs. Frequency
06304-021
OUTPUT-REFERRED NOISE (dBFS/ Hz)
V
GAIN
(V)
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
–140
–139
–138
–137
–136
–135
–134
–133
–132
–131
LNA GAIN = 5×
LNA GAIN = 6×
LNA GAIN = 8×
Figure 27. Short-Circuit, Output-Referred Noise vs. V
GAIN
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
06304-020
SNR/SINAD
V
GAIN
(V)
59.5
60.0
60.5
61.0
61.5
62.0
62.5
63.0
63.5
64.0
SNR (dBFS)
SINAD (dBFS)
Figure 28. SNR/SINAD vs. V
GAIN
, AIN = −6.5 dBFS
06304-024
INPUT-REFERRED NOISE (nV/ Hz)
TEMPERATURE (°C)
–40 –20 0 20 40 60 80
1.40
1.45
1.50
1.55
1.60
1.65
1.70
Figure 29. Short-Circuit, Input-Referred Noise vs. Temperature