WM8986GECOSLASHV datasheet(29/87 Pages) WOLFSON

Part #	WM8986GECO/V

Description	Multimedia DAC With Class D Headphone and Line Out

PDF	87 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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29 / 87 page

Pre-Production

WM8986

PP, Rev 3.1, February 2007

AUXILIARY INPUTS

There are two auxiliary inputs, AUXL and AUXR which can be used for a variety of purposes such as

stereo line inputs or as a ‘beep’ input signal to be mixed with the outputs.

The AUXL/R inputs can be used as a line input to the input BOOST stage which has adjustable gain

of -12dB to +6dB in 3dB steps, with an additional "off" state (i.e. not connected). See the INPUT

BOOST section for further details.

The AUXL/R inputs can also be mixed into the output channel mixers, with a gain of -15dB to +6dB

plus off.

INPUT BOOST

Each of the stereo input PGA stages is followed by an input BOOST circuit. The input BOOST circuit

has 2 selectable inputs: the input microphone PGA output or the AUX amplifier output. These three

inputs can be mixed together and have individual gain boost/adjust as shown in Figure 18.

Figure 18 Input Boost Stage

WM8986GECO/V Datasheet(PDF) 29 Page - Wolfson Microelectronics plc