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AD1859 Datasheet(PDF) 14 Page - Analog Devices |
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AD1859 Datasheet(HTML) 14 Page - Analog Devices |
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14 / 16 page  REV. A –14– AD1859 TYPICAL PERFORMANCE Figures 24 through 27 illustrate the typical analog performance of the AD1859 as measured by an Audio Precision System One. Signal-to-Noise (dynamic range) and THD+N performance is shown under a range of conditions. Note that there is a small variance between the AD1859 analog performance specifica- tions and some of the performance plots. This is because the Audio Precision System One measures THD and noise over a 20 Hz to 24 kHz bandwidth, while the analog performance is specified over a 20 Hz to 20 kHz bandwidth (i.e., the AD1859 performs slightly better than the plots indicate). Figure 28 shows the power supply rejection performance of the AD1859. The channel separation performance of the AD1859 is shown in Figure 29. The AD1859’s low level linearity is shown in Figure 30. The digital filter transfer function is shown in Figure 31. 0 20k 2k 4k 6k 8k 10k 12k 14k 16k 18k 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 –130 –140 FS = 44.1kHz FFT @ –0.5dBFS FREQUENCY – Hz Figure 24. 1 kHz Tone at –0.5 dBFS (16K-Point FFT) 0 20k 2k 4k 6k 8k 10k 12k 14k 16k 18k 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 –130 –140 FS = 44.1kHz FFT @ –10dBFS FREQUENCY – Hz Figure 25. 1 kHz Tone at –10 dBFS (16K-Point FFT) 0 20k 2k 4k 6k 8k 10k 12k 14k 16k 18k 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 FS = 44.1kHz THD+N vs FREQ @ –0.5dBFS FREQUENCY – Hz Figure 26. THD+N vs. Frequency at –0.5 dBFS –100 0 –90 –80 –70 –60 –50 –40 –30 –20 –10 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 AMPLITUDE – dBFS FS = 44.1kHz THD+N vs dBFS @ 1kHz Figure 27. THD+N vs. Amplitude at 1 kHz 0 20k 2k 4k 6k 8k 10k 12k 14k 16k 18k –40 –45 –65 –70 –75 –80 –55 –60 –50 LEFT CHANNEL RIGHT CHANNEL FREQUENCY – Hz Figure 28. Power Supply Rejection to 300 mV p-p on AVDD 0 20k 2k 4k 6k 8k 10k 12k 14k 16k 18k 0 –10 –90 –50 –60 –70 –80 –30 –40 –20 –100 –110 –120 FREQUENCY – Hz FS = 44.1kHz Figure 29. Channel Separation vs. Frequency at –0.5 dBFS |
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