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AD9675KBCZ датащи(PDF) 20 Page - Analog Devices |
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AD9675KBCZ датащи(HTML) 20 Page - Analog Devices |
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20 / 61 page ![]() Data Sheet AD9675 Rev. A | Page 19 of 60 Figure 27. LNA Input Impedance Magnitude and Phase, Unterminated Figure 28. IMD3 vs. Channel Gain Figure 29. IMD3 vs. ADC Output Level Figure 30. Noise Figure vs. Frequency RS = RIN = 100 Ω, LNA Gain = 17.9 dB, PGA Gain = 30 dB, VGAIN = 1.6 V 8 7 6 5 4 3 2 1 0 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 100k 1M 10M 100M FREQUENCY (Hz) FREQUENCY (Hz) 100k 1M 10M 100M 0 –100 15 50 CHANNEL GAIN (dB) –90 –80 –70 –60 –50 –40 –30 –20 –10 20 25 30 35 40 45 fIN1 = 2.3MHz fIN2 = 2.31MHz FUND1 LEVEL = –1dBFS FUND2 LEVEL = –21dBFS RS = 50Ω RIN = 50Ω RIN = 1000Ω RIN = 300Ω 0 –120 –40 0 ADC OUTPUT LEVEL (dBFS) –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 –35 –30 –25 –20 –15 –10 –5 VGAIN = +1.6V VGAIN = 0V VGAIN = –1.2V fIN1 = 5.0MHz fIN2 = 5.01MHz FUND1 LEVEL = –1dBFS FUND2 LEVEL = –21dBFS 7 1 020 FREQUENCY (MHz) 2 3 4 5 6 2468 10 12 14 16 18 |
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