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AD7664 Datasheet(PDF) 13 Page - Analog Devices |
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AD7664 Datasheet(HTML) 13 Page - Analog Devices |
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13 / 28 page ![]() AD7679 Rev. A | Page 13 of 28 POSITIVE DNL (LSB) 120 0 100 60 20 0 40 80 0.5 1.0 1.5 03085-0-011 2.0 Figure 11. Typical Positive DNL Distribution (424 Units) NEGATIVE DNL (LSB) 180 –1.00 160 100 20 0 60 140 –0.75 –0.50 –0.25 03085-0-014 0 120 40 80 Figure 12. Typical Negative DNL Distribution (424 Units) FREQUENCY (kHz) 0 0 30 60 240 270 –40 –60 –100 –180 –80 –120 03085-0-012 –140 –20 –160 90 120 150 180 210 fS = 570kSPS fIN = 10kHz VREF = 4.096V SNR = 98.5dB THD = 115.8dB SFDR = 117.4dB S/(N+D) = 98.4dB Figure 13. FFT (10 kHz Tone) FREQUENCY (kHz) 105 1 100 90 80 75 85 10 100 1000 03085-0-015 95 ENOB S/(N+D) SNR 16.5 17.0 15.5 16.0 14.5 15.0 14.0 Figure 14. SNR, S/(N+D), and ENOB vs. Frequency FREQUENCY (kHz) –60 1 –70 –100 –130 –120 –80 10 100 1000 03085-0-016 –90 –110 THD THIRD HARMONIC SFDR 140 60 20 40 0 120 80 100 SECOND HARMONIC Figure 15. THD, SFDR, and Harmonics vs. Frequency INPUT LEVEL (dB) –60 98 96 100 03085-0-017 SNR –50 0 –10 –20 –30 –40 102 VREF = 4.096V S/(N+D) Figure 16. SNR and S/(N+D) vs. Input Level |
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