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AD1854 Datasheet(PDF) 11 Page - Analog Devices |
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AD1854 Datasheet(HTML) 11 Page - Analog Devices |
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11 / 12 page  AD1854 –11– REV. A TYPICAL PERFORMANCE Figures 13 through 20 illustrate the typical analog performance of the AD1854 as measured by an Audio Precision System Two. Signal-to-Noise and THD+N performance are shown under a range of conditions. Figure 14 shows the power supply rejection 020 2468 10 12 14 16 18 –60 –65 –105 –85 –90 –95 –100 –75 –80 –70 –110 –115 –120 –125 –130 FREQUENCY – kHz –135 –140 –145 –150 –155 –160 –60 –65 –105 –85 –90 –95 –100 –75 –80 –70 –110 –115 –120 –125 –130 –135 –140 –145 –150 –155 –160 Figure 13. THD+N at 1 kHz, –0.5 dBFS (8K-Point FFT) 0 20 24 6 8 10 12 14 16 18 –40 –45 –85 –65 –70 –75 –80 –55 –60 –50 –100 –105 FREQUENCY – kHz –110 –90 –95 –40 –45 –50 –55 –60 –65 –70 –75 –80 –85 –90 –95 –100 –105 –110 Figure 14. THD+N vs. Frequency at –0.5 dBFS 020 2 4 6 8 10 12 14 16 18 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 –130 –140 FREQUENCY – kHz –150 –160 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 –130 –140 –150 –160 Figure 15. Dynamic Range: 1 kHz at –60 dBFS (8K Point FFT) –120 0 –110 –100 –90 –80 –70 –60 –50 –40 –30 0 –60 –80 –40 –20 –100 –120 AMPLITUDE – dBFS –20 –10 0 –20 –40 –60 –80 –100 –120 Figure 16. THD+N vs. Level at 1 kHz 20 50 100 200 500 1k 2k 5k 10k 20k FREQUENCY – Hz –40 –45 –65 –70 –75 –80 –55 –60 –50 –85 –90 –40 –45 –65 –70 –75 –80 –55 –60 –50 –85 –90 Figure 17. Power Supply Rejection to 300 mV p-p on AVDD 020 2 4 6 8 10 12 14 16 18 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 –130 –140 FREQUENCY – kHz –150 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 –110 –120 –130 –140 –150 –160 –160 Figure 18. Noise Floor, A-Weighted (8K-Point FFT) performance of the AD1854. Figure 15 shows the noise floor of the AD1854. The digital filter transfer function is shown in Figure 16. The two-tone test in Figure 17 is per the SMPTE Standard for Measuring Intermodulation Distortion. |
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