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AD9789BBCZ датащи(PDF) 15 Page - Analog Devices |
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AD9789BBCZ датащи(HTML) 15 Page - Analog Devices |
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15 / 76 page ![]() AD9789 Rev. A | Page 15 of 76 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 0 100 200 300 400 500 600 700 800 900 1000 FREQUENCY (MHz) DOCSIS3 CMOS LVDS Figure 26. ACLR Performance for CMOS and LVDS Interfaces, 1-Channel QAM, fOUT = 840 MHz, fDAC = 2.4 GHz, Full-Scale Current = 20 mA, Sum Scale = 48 (DOCSIS SPEC Is −73 dBc) –5 –15 –25 –35 –45 –55 –65 –75 –85 50 250 450 650 850 1050 FREQUENCY (MHz) DOCSIS3 25°C 65°C 85°C Figure 27. ACLR Performance over Temperature, 2-Channel QAM, fOUT = 800 MHz, fDAC = 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32 (DOCSIS SPEC Is −70 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 28. Third-Order Harmonic Performance vs. fOUT over Temperature, 2-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32 (DOCSIS SPEC Is −70 dBc; Harmonic Exception Is −63 dBc) –5 –15 –25 –35 –45 –55 –65 –75 –85 50 250 450 650 850 1050 FREQUENCY (MHz) DOCSIS3 25°C 65°C 85°C Figure 29. ACLR Performance over Temperature, 2-Channel QAM, fOUT = 200 MHz, fDAC = 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32 (DOCSIS SPEC Is −70 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 30. Second Harmonic Performance vs. fOUT over Temperature, 2-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32 (DOCSIS SPEC Is −70 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 31. Noise Floor vs. fOUT over Temperature (ACLR Measured Beyond 30 MHz), 2-Channel QAM, fDAC = 2.3 GHz, Full-Scale Current = 25 mA, Sum Scale = 32 (DOCSIS SPEC Is −70 dBc) |
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