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WM8904ECS/R 数据表(PDF) 182 Page - Wolfson Microelectronics plc |
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WM8904ECS/R 数据表(HTML) 182 Page - Wolfson Microelectronics plc |
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182 / 188 page  WM8904 Pre-Production w PP, Rev 3.3, September 2012 182 3. Zobel Networks The Zobel network shown in Figure 71 is required on HPOUTL, HPOUTR, LINEOUTL and LINEOUTR whenever that output is enabled. Stability of these ground-referenced outputs across all process corners cannot be guaranteed without the Zobel network components. (Note that, if any ground-referenced output pin is not required, the zobel network components can be omitted from the output pin, and the pin can be left floating.) The Zobel network requirement is detailed further in the applications note WAN_0212 “Class W Headphone Impedance Compensation”. Zobel networks (C6, C7, C8, C9, R1, R2, R3, R4) should be positioned reasonably close to the WM8904. 4. Microphone Grounding R7 and R8 can be populated with other values to remove common mode noise on the microphone if required. |
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