Datasheet

AD9273
Rev. B | Page 16 of 48
–7 –6 –5 –4
500k
450k
400k
350k
300k
250k
200k
150k
100k
50k
0
–3–2–101234567
NUMBER OF HITS
CODES
07030-115
Figure 12. Output-Referred Noise Histogram, GAIN+ = 0.0 V
–7 –6 –5 –4
200k
180k
160k
140k
120k
100k
80k
60k
40k
20k
0
–3–2–101234567
NUMBER OF HITS
CODES
07030-116
Figure 13. Output-Referred Noise Histogram, GAIN+ = 1.6 V
3.0
2.5
2.0
1.5
1.0
0.5
0
12345678910
INPUT-REFERRED NOISE (nV/
√
Hz)
FREQUENCY (MHz)
LNA GAIN = 21.3dB
LNA GAIN = 15.6dB
LNA GAIN = 17.9dB
07030-187
Figure 14. Short-Circuit, Input-Referred Noise vs. Frequency,
PGA Gain = 30 dB, GAIN+ = 1.6 V
–
128
–129
–130
–131
–132
–133
–134
–135
–136
–137
–138
–139
00.20.40.60.8
GAIN+ (V)
1.0 1.2 1.4 1.6
OUTPUT-REFERRED NOISE (dBFS/Hz)
LNA GAIN = 12×
LNA GAIN = 6×
07030-117
LNA GAIN = 8×
Figure 15. Short-Circuit, Output-Referred Noise vs. GAIN+
40
45
50
55
60
65
0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6
SNR/SIN
A
D(dBFS)
GAIN+ (V)
SINAD
SNR
07030-118
Figure 16. SNR/SINAD vs. GAIN+, AIN = −1.0 dBFS
0
–2
–4
–6
–8
–10
–12
–14
–16
–18
–20
0 5 10 15 20 25
AMPLITUDE (dBFS)
FREQUENCY (MHz)
07030-120
25MSPS
40MSPS
50MSPS
Figure 17. Antialiasing Filter (AAF) Pass-Band Response,
LPF Cutoff = 1 × (1/3) × f
SAMPLE