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AD7944BCPZ датащи(PDF) 10 Page - Analog Devices |
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AD7944BCPZ датащи(HTML) 10 Page - Analog Devices |
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10 / 28 page ![]() AD7944 Rev. 0 | Page 10 of 28 0 250 500 750 1000 1250 –180 –160 –140 –120 –100 –80 –60 –40 –20 0 0 250 500 750 1000 1250 –180 –160 –140 –120 –100 –80 –60 –40 –20 0 FREQUENCY (kHz) fS = 2.5MSPS fIN = 20kHz SNR = 84.65dB THD = –100dB SINAD = 84.5dB fS = 2.5MSPS fIN = 20kHz SNR = 84dB THD = –102dB SINAD = 84dB FREQUENCY (kHz) Figure 11. FFT Plot (External Reference) Figure 14. FFT Plot (Internal Reference) – 12.0 78 2.5 3.0 3.5 4.0 4.5 5.0 SINAD ENOB SNR 12.5 13.0 13.5 14.0 14.5 15.0 79 80 81 82 83 84 REFERENCE VOLTAGE (V) Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage –105 –104 –103 –102 –101 100 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 REFERENCE VOLTAGE (V) Figure 15. THD vs. Reference Voltage –110 80.0 80.5 1 10 100 1000 FREQUENCY (kHz) 81.0 81.5 82.0 82.5 83.0 83.5 84.0 84.5 85.0 Figure 13. SINAD vs. Frequency – –105 –100 –95 –90 –85 80 1 10 100 1000 FREQUENCY (kHz) Figure 16. THD vs. Frequency |
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