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AD6644ST Datasheet(PDF) 9 Page - Analog Devices |
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AD6644ST Datasheet(HTML) 9 Page - Analog Devices |
9 / 19 page AD6644 –9– REV. 0 Typical Performance Characteristics– FREQUENCY – MHz 0 –120 0 5 101520 –130 25 30 –110 –100 –90 –80 –70 –60 –50 –40 –30 –20 –10 ENCODE = 65MSPS AIN = 2.2MHz @ –1dBFS SNR = 74.5dB SFDR = 92dBc Figure 8. Single Tone at 2.2 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 = 15.5MHz @ –1dBFS SNR = 74dB SFDR = 90dBc Figure 9. Single Tone at 15.5 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 = 30MHz @ –1dBFS SNR = 73.5dB SFDR = 85dBc Figure 10. Single Tone at 30 MHz FREQUENCY – MHz 0 30 5 10 152025 74.5 73.5 72.5 72.0 74.0 T = –25 C T = 25 C 73.0 75.0 ENCODE = 65MSPS, AIN = –1dBFS TEMP = –25 C, 25 C, 85 C T = 85 C Figure 11. Noise vs. Analog Frequency (Nyquist) ANALOG INPUT FREQUENCY – MHz 0 30 510 15 20 25 92 86 82 80 90 T = 25 C T = 25 C, 85 C ENCODE = 65MSPS, AIN = –1dBFS TEMP = 25 C, 25 C, 85 C 84 88 94 Figure 12. Harmonics vs. Analog Frequency (Nyquist) ANALOG FREQUENCY – MHz 0 100 10 20 50 70 80 74 71 69 68 73 70 72 75 30 40 60 90 AIN = –1dBFS ENCODE = 65MSPS PHASE NOISE OF ANALOG SOURCE DEGRADES PERFORMANCE LOW NOISE ANALOG SOURCE Figure 13. Noise vs. Analog Frequency (IF) |
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