wm8918 Wolfson Microelectronics plc, wm8918 Datasheet - Page 171
wm8918
Manufacturer Part Number
wm8918
Description
Ultra Low Power Dac For Portable Audio Applications
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8918.pdf
(175 pages)
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3.
4.
w
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
Zobel networks (C6, C7, C8, C9, R1, R2, R3, R4) should be positioned reasonably close to the WM8918.
Microphone Grounding
R7 can be populated with other values to remove common mode noise on the microphone if required.
PD, Rev 4.0, September 2010
WM8918
171
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