WM8903 datasheet(53/178 Pages) WOLFSON

Part #	WM8903

Description	Ultra Low Power CODEC for Portable Audio Applications

PDF	178 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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53 / 178 page

Production Data

WM8903

PD, Rev 4.5, June 2012

DIGITAL MIXING

The ADC and DAC data can be combined in various ways to support a range of different usage

modes.

Data from either of the two ADCs can be routed to either the left or the right channel of the digital

audio interface. In addition, data from either of the digital audio interface channels can be routed to

either the left or the right DAC. See “Digital Audio Interface” for more information on the audio

interface.

The WM8903 provides a Dynamic Range Control (DRC) feature, which can apply compression and

gain adjustment in the digital domain to the ADC signal path. This is effective in controlling signal

levels under conditions where input amplitude is unknown or varies over a wide range.

The DACs can be configured as a mono mix of the two audio channels. Digital sidetone from the

ADCs can also be selectively mixed into the DAC output path.

DIGITAL MIXING PATHS

Figure 31 shows the digital mixing paths available in the WM8903 digital core.

Figure 31 Digital Mixing Paths

WM8903 Datasheet(PDF) 53 Page - Wolfson Microelectronics plc