WM8510GEDSSLASHV datasheet(19/81 Pages) WOLFSON

Part #	WM8510GEDS/V

Description	Mono CODEC with Speaker Driver

PDF	81 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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19 / 81 page

Pre-Production

WM8510

PD Rev 4.1 December 2006

Figure 9 Microphone Bias Schematic

ANALOGUE TO DIGITAL CONVERTER (ADC)

The WM8510 uses a multi-bit, oversampled sigma-delta ADC channel. The use of multi-bit feedback

and high oversampling rates reduces the effects of jitter and high frequency noise. The ADC Full

Scale input level is proportional to AVDD. With a 3.3V supply voltage, the full scale level is 1.0Vrms.

Any voltage greater than full scale may overload the ADC and cause distortion.

ADC DIGITAL FILTERS

The ADC filters perform true 24 bit signal processing to convert the raw multi-bit oversampled data

from the ADC to the correct sampling frequency to be output on the digital audio interface. The digital

filter path is illustrated in Figure 10.

Figure 10 ADC Digital Filter Path

AGND

MBVSEL=0

MICBIAS

= 1.8 x VMID

= 0.9 X AVDD

VMID

internal

resistor

internal

resistor

MBVSEL=1

MICBIAS

= 1.3 x VMID

= 0.65 X AVDD

WM8510GEDS/V Datasheet(PDF) 19 Page - Wolfson Microelectronics plc