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AD7985BCPZ Datasheet(PDF) 10 Page - Analog Devices |
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AD7985BCPZ Datasheet(HTML) 10 Page - Analog Devices |
10 / 28 page AD7985 Rev. 0 | Page 10 of 28 0 –180 –160 –140 –120 –100 –80 –60 –40 –20 01250 fS = 2.5MSPS fIN = 20kHz SNR = 89.87dB THD = –102.76dB SINAD = 89.66dB 1000 750 500 250 FREQUENCY (kHz) Figure 11. FFT Plot (External Reference) 100 95 90 85 80 16 15 14 13 12 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) SNR SINAD ENOB Figure 12. SNR, SINAD, and ENOB vs. Reference Voltage 95 90 85 80 75 70 65 11000 100 10 FREQUENCY (kHz) Figure 13. SINAD vs. Frequency 0 –180 –160 –140 –120 –100 –80 –60 –40 –20 0 1250 1000 750 500 250 FREQUENCY (kHz) fS = 2.5MSPS fIN = 20kHz SNR = 88.45dB THD = –103.42dB SINAD = 88.32dB Figure 14. FFT Plot (Internal Reference) –90 –95 –100 –105 –110 100 95 90 85 80 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) SFDR THD Figure 15. THD and SFDR vs. Reference Voltage –85 –90 –95 –100 –105 –110 11 100 10 FREQUENCY (kHz) 000 Figure 16. THD vs. Frequency |
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