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WM8976 датащи(PDF) 21 Page - Wolfson Microelectronics plc |
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WM8976 датащи(HTML) 21 Page - Wolfson Microelectronics plc |
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21 / 83 page ![]() Preliminary Technical Data WM8976 w PTD Rev 2.0 February 2005 21 4. The headphone charge time, thp_midrail_on, is mainly determined by the headphone output coupling capacitor charge time. This time is dependent upon the value of the headphone coupling capacitor. The values above were measured using a 100µF capacitor and were taken at 10% and 90% points on the charge time curve. 5. The headphone discharge time, thp_midrail_off, is dependent upon the value of the headphone coupling capacitor and the leakage resistance path to ground. The values above were measured using a 100µF capacitor and were taken at 10% and 90% points on the discharge time curve. 6. The VMIDSEL and BIASEN bits must be set to enable analogue output midrail voltage and for normal DAC operation. |
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