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AD6640AST Datasheet(PDF) 9 Page - Analog Devices |
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AD6640AST Datasheet(HTML) 9 Page - Analog Devices |
9 / 24 page AD6640 REV. 0 –9– FREQUENCY – MHz 0 60 100 dc 32.5 6.5 13.0 19.5 26.0 40 80 20 120 ENCODE = 65MSPS AIN = 15.0, 16.0MHz NO DITHER Figure 13. Two Tones at 15.0 MHz & 16.0 MHz ANALOG INPUT POWER LEVEL – dBFS 100 0 –80 0 –70 –60 –50 –40 –30 –20 –10 90 60 40 20 10 80 70 50 30 ENCODE = 65MSPS AIN = 31.0MHz dBFS dBc SFDR = 80dB REFERENCE LINE Figure 14. Single Tone SFDR INPUT POWER LEVEL (F1 = F2) – dBFS 100 0 –80 0 –70 –60 –50 –40 –30 –20 –10 90 60 40 20 10 80 70 50 30 ENCODE = 65MSPS F1 = 15.0MHz F2 = 16.0MHz SFDR = 80dB REFERENCE LINE dBFS dBc Figure 15. Two Tone SFDR SAMPLE RATE – MSPS dc 80 8 16 24 32 40 48 56 64 72 80 70 65 60 75 AIN = 19.5MHz SNR WORST SPUR 85 Figure 16. SNR, Worst Spurious vs. Encode ENCODE DUTY CYCLE – % 25 75 30 35 40 45 50 55 60 65 70 90 65 55 45 75 85 80 70 60 50 40 35 30 ENCODE = 65MSPS AIN = 2.2MHz WORST SPUR SNR Figure 17. SNR, Worst Spurious vs. Duty Cycle ENCODE POWER – dBm –15 15 –12 –9 –6 –3 0 3 6 9 12 90 65 55 45 75 85 80 70 60 50 40 35 30 ENCODE = 65MSPS WORST SPUR SNR 2.2MHz 2.2MHz 69MHz 69MHz Figure 18. SNR, Worst Spurious vs. Encode Power |
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