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AD6644AST-40 Datasheet(PDF) 10 Page - Analog Devices |
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AD6644AST-40 Datasheet(HTML) 10 Page - Analog Devices |
10 / 19 page AD6644 –10– REV. 0 HARMONICS (2nd, 3rd) ANALOG FREQUENCY – MHz 0 100 10 20 50 70 80 95 75 60 55 85 65 80 100 30 40 60 90 70 90 WORST OTHER SPUR ENCODE = 65MSPS AIN = –1dBFS Figure 14. Harmonics vs. Analog Frequency (IF) ANALOG INPUT POWER LEVEL – dBFS –80 0 –70 –40 –20 –10 100 50 10 0 90 40 70 120 –60 –50 –30 20 30 60 80 110 SFDR = 90dB REFERENCE LINE ENCODE = 65MSPS AIN = 15.5MHz dBc dBFS Figure 15. Single Tone SFDR FREQUENCY – MHz 0 –120 0 5 101520 –130 25 30 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 ENCODE = 65MSPS AIN = 19MHz, 19.5MHz @ –7dBFS NO DITHER Figure 16. Two Tones at 19 MHz and 19.5 MHz FREQUENCY – MHz 0 –120 0 5 101520 –130 25 30 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 ENCODE = 65MSPS AIN = 15MHz, 15.5MHz @ –7dBFS NO DITHER Figure 17. Two Tones at 15 MHz and 15.5 MHz INPUT POWER LEVEL – (F1 = F2) dBFS –77 –7 –67 –27 –17 100 50 10 0 90 40 70 –57 –47 –37 20 30 60 80 110 ENCODE = 65MSPS F1 = 15MHz F2 = 15.5MHz SFDR = 90dB REFERENCE LINE dBFS dBc Figure 18. Two-Tone SFDR ENCODE FREQUENCY – MHz 0 10 60 70 65 60 95 75 85 20 40 50 70 80 90 100 WORST SPUR SNR 30 80 90 AIN = 2.2MHz @ –1dBFS Figure 19. SNR, Worst Spurious vs. Encode |
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