WM8985GEFLSLASHR datasheet(34/121 Pages) WOLFSON

номер детали	WM8985GEFL/R

подробное описание детали	Multimedia CODEC with Class D Headphone and Line Out

PDF	121 Pages

Scroll/Zoom	100%

производитель	WOLFSON [Wolfson Microelectronics plc]

домашняя страница	http://www.wolfsonmicro.com

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WM8985

Production Data

PD, Rev 4.6, July 2009

AUXILLIARY 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 to ADC input). 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 3 selectable inputs: the input microphone PGA output, the AUX amplifier output and the

L2/R2 input pin (can be used as a line input, bypassing the input PGA). These three inputs can be

mixed together and have individual gain boost/adjust as shown in Figure 17.

Figure 17 Input Boost Stage

WM8985GEFL/R датащи(PDF) 34 Page - Wolfson Microelectronics plc