WM8912 datasheet(45/128 Pages) WOLFSON

No. de pieza	WM8912

Descripción Electrónicos	Ultra Low Power DAC with Headphone Driver for Portable Audio Applications

PDF	128 Pages

Scroll/Zoom	100%

Fabricante Electrónico	WOLFSON [Wolfson Microelectronics plc]

Página de inicio	http://www.wolfsonmicro.com

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45 / 128 page

Production Data

WM8912

PD, Rev 4.0, September 2010

EXTERNAL COMPONENTS FOR GROUND REFERENCED OUTPUTS

It is recommended to connect a zobel network to the ground-referenced outputs HPOUTL, HPOUTR,

LINEOUTL and LINEOUTR in order to ensure best audio performance in all applications. The

components of the zobel network have the effect of dampening high frequency oscillations or

instabilities that can arise outside the audio band under certain conditions. Possible sources of these

instabilities include the inductive load of a headphone coil or an active load in the form of an external

line amplifier. The capacitance of lengthy cables or PCB tracks can also lead to amplifier instability.

The zobel network should comprise of a 20

Ω resistor and 100nF capacitor in series with each other,

as illustrated in Figure 23.

Note that the zobel network is recommended for best audio quality and amplifier stability in all cases.

Figure 23 Zobel Network Components for HPOUTL, HPOUTR, LINEOUTL and LINEOUTR

WM8912 Datasheet(PDF) 45 Page - Wolfson Microelectronics plc