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TAS5012 Datasheet(PDF) 8 Page - Texas Instruments |
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TAS5012 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 19 page TAS5012 SLES006A – SEPTEMBER 2001 – REVISED DECEMBER 2001 8 www.ti.com functional description (continued) Initialization Normal State MUTE VALID_L 5 ms max 10 µs Maximum 50–50 Duty Cycle (P, M Complementary) Inactive State VALID_R PWM Outputs (P, M Complementary) Figure 5. Mute Timing double speed Double-speed mode is used to support sampling rates of 88.2 kHz and 96 kHz. In order to put the TAS5012 in double-speed mode with the device in normal operating conditions, the RESET pin must be held low while switching the DBSPD pin high. After the RESET pin is brought high again, a reset sequence takes place. If the change is at power up, a power-up sequence is originated. quad speed Quad-speed mode is used to support sampling rates of 176.4 kHz and 192 kHz. It is supported in slave mode only. In order to put the TAS5012 in quad-speed mode, M_S and DBPSB pins are brought low. Quad-speed mode is then automatically detected due to the fact that it is the only mode in which MCLK_IN is 128Fs. DEM_SEL must be set to low when operating in the quad-speed mode. de-emphasis filter For audio sources that have been preemphasized, a precision 50- µs/15-µs de-emphasis filter is provided to support the sampling rates of 44.1 kHz and 48 kHz. Pins DEM_SEL and DEM_EN select the de-emphasis functions. See Figure 6 for a graph showing the de-emphasis filtering characteristics. See Table 3 for de-emphasis selection. 0 –10 3.18 (50 µs) 10.6 (15 µs) f – Frequency – kHz De-emphasis Figure 6. De-Emphasis Filter Characteristics |
Similar Part No. - TAS5012_06 |
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Similar Description - TAS5012_06 |
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