AD9276 Analog Devices, AD9276 Datasheet - Page 17

• Manufacturer Part Number: AD9276
• Description: Octal LNA/VGA/AAF/12-Bit ADC and CW I/Q Demodulator
• Manufacturer: Analog Devices

Specifications of AD9276

• Resolution (bits): 12bit
• # Chan: 8
• Sample Rate: 80MSPS
• Interface: LVDS,Ser
• Analog Input Type: SE-Uni
• Ain Range: 2 V p-p
• Adc Architecture: n/a
• Pkg Type: QFP

CW DOPPLER MODE
f
RF
= 2.5 MHz at −3 dBFS, f
Figure 24. Quadrature Amplitude Imbalance vs. Baseband Frequency
–0.02
–0.04
–0.06
–0.08
–0.10
–0.2
–0.4
–0.6
–0.8
–1.0
–1.2
140
142
144
146
148
150
152
154
156
158
160
162
164
166
0.10
0.08
0.06
0.04
0.02
Figure 23. Quadrature Phase Error vs. Baseband Frequency
1.2
1.0
0.8
0.6
0.4
0.2
–20
0
100
0
100
Figure 25. Output-Referred SNR vs. Input Level
–18
–16
BASEBAND FREQUENCY (Hz)
–14
BASEBAND FREQUENCY (Hz)
INPUT LEVEL (dBFS)
4LO
1k
1kHz OFFSET
1k
–12
= 10 MHz, R
–10
–8
5kHz OFFSET
–6
S
= 50 Ω, LNA gain = 21.3 dB, LNA bias = high, all CW channels enabled, phase rotation 0°.
10k
10k
–4
–2
0
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175
170
165
160
155
150
145
130
135
140
145
150
155
160
165
12
10
8
6
4
2
0
0
0
0
Figure 28. Output-Referred SNR vs. Baseband Frequency
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
1000 2000 3000 4000 5000 6000 7000 8000 9000 10,000
Figure 27. Noise Figure vs. Baseband Frequency
Figure 26. Small-Signal Dynamic Range
BASEBAND FREQUENCY (Hz)
BASEBAND FREQUENCY (Hz)
BASEBAND FREQUENCY (Hz)
CH A + B + C + D + E + F + G + H
CH A + B + C + D
CH A
CH A + B
AD9276