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AD9789BBCZ датащи(PDF) 14 Page - Analog Devices |
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AD9789BBCZ датащи(HTML) 14 Page - Analog Devices |
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14 / 76 page ![]() AD9789 Rev. A | Page 14 of 76 –5 –15 –25 –35 –45 –55 –65 –75 –85 50 250 450 650 850 FREQUENCY (MHz) DOCSIS3 –40°C 0°C +25°C +85°C Figure 20. ACLR Performance over Temperature, 1-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 20 mA, fOUT = 200 MHz, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc; Harmonic Exception Is −63 dBc) –55 –60 –65 –70 –75 –80 –85 0 100 200 300 400 500 600 700 800 900 1000 fOUT (MHz) DOCSIS3 25°C 65°C 85°C Figure 21. Second-Order Harmonic Performance vs. fOUT over Temperature, 1-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 20 mA, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc; Harmonic Exception Is −63 dBc) –55 –60 –65 –70 –75 –80 –85 0 100 200 300 400 500 600 700 800 900 1000 fOUT (MHz) DOCSIS3 25°C 65°C 85°C Figure 22. Noise Floor vs. fOUT over Temperature (ACLR Measured Beyond 30 MHz), 1-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 20 mA, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc) –5 –15 –25 –35 –45 –55 –65 –75 –85 50 150 250 350 450 550 650 750 850 950 FREQUENCY (MHz) DOCSIS3 –40°C 0°C +25°C +85°C Figure 23. ACLR Performance over Temperature, 1-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 20 mA, fOUT = 800 MHz, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc) –55 –60 –65 –70 –75 –80 –85 0 100 200 300 400 500 600 700 800 900 1000 fOUT (MHz) DOCSIS3 25°C 65°C 85°C Figure 24. Third-Order Harmonic Performance vs. fOUT over Temperature, 1-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 20 mA, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc; Harmonic Exception Is −63 dBc) –5 –15 –25 –35 –45 –55 –65 –75 –85 50 250 450 650 850 1050 FREQUENCY (MHz) DOCSIS3 2.3GHz 2.2GHz 2.4GHz Figure 25. ACLR Performance over fDAC, 1-Channel QAM, fOUT = 850 MHz, Full-Scale Current = 20 mA, Temperature = 25°C, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc) |
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