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WM8903 Datasheet(PDF) 173 Page - Wolfson Microelectronics plc

Part # WM8903
Description  Ultra Low Power CODEC for Portable Audio Applications
PDF  178 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8903 Datasheet(HTML) 173 Page - Wolfson Microelectronics plc

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Production Data
WM8903
w
PD, Rev 4.5, June 2012
173
3.
Zobel Networks
The Zobel network shown in Figure 67 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 (CC16, C17, C18, C19, R9, R10, R11, R12) should be positioned reasonably close to the WM8903.
4.
Microphone Grounding
R3 and R4 can be populated with other values to remove common mode noise on the microphone if required.



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