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WM8980CGEFL/V Datasheet(PDF) 66 Page - Wolfson Microelectronics plc |
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WM8980CGEFL/V Datasheet(HTML) 66 Page - Wolfson Microelectronics plc |
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66 / 123 page  WM8980 Pre-Production w PP, Rev 3.8, May 2012 66 OUTPUT PHASING The relative phases of the analogue outputs will depend upon the following factors: 1. DACPOLL and DACPOLR invert bits: Setting these bits to 1 will invert the DAC output. 2. Mixer configuration: The polarity of the signal will depend upon the route through the mixer path. For example, DACL can be directly input to the OUT3 mixer, giving a 180° phase shift at the OUT3 mixer output. However, if DACL is input to the OUT3 mixer via the left mixer, an additional phase shift will be introduced, giving 0° phase shift at the OUT3 mixer output. 3. Output boost set-up: When 1.5x boost is enabled on an output, no phase shift occurs. When 1.5x boost is not enabled, a 180° phase shift occurs. Figure 26 shows where these phase inversions can occur in the output signal path. Figure 34 Output Signal Path Phasing |
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