WM8961 datasheet(6/116 Pages) WOLFSON

6 / 116 page

WM8961

Pre-Production

PP, August 2009, Rev 3.1

PIN DESCRIPTION

PIN NO

NAME

TYPE

DESCRIPTION

VNEG

Analogue Output

Charge pump negative supply decoupling (powers HP_L,

HP_R)

CFB2

Analogue Output

Charge pump fly-back capacitor pin

CFB1

Analogue Output

Charge pump fly-back capacitor pin

CPGND

Supply

Charge pump ground (Return path for CPVDD)

CPVDD

Supply

Charge pump power supply

MICBIAS

Analogue Output

Microphone bias

RINPUT

Analogue Input

Right channel input

LINPUT

Analogue Input

Left channel input

MICVDD

Supply

Microphone bias amp supply

DVDD

Supply

Digital core and buffer (I/O) supply

DGND

Supply

Digital ground

BCLK

Digital Input / Output

Audio interface bit clock

LRC

Digital Input / Output

Audio interface left / right clock

DACDAT

Digital Input

DAC digital audio data

MCLK

Digital Input

Master clock

ADCDAT

Digital Output

ADC digital audio data

SCLK

Digital Input

Control interface clock input

SDIN

Digital Input/Output

Control interface data input / 2-wire acknowledge output

SPK_RN

Analogue Output

Right speaker negative output

SPKGND2

Supply

Ground for right speaker drivers

SPKVDD2

Supply

Supply for right speaker drivers

SPK_RP

Analogue Output

Right speaker positive output

SPK_LN

Analogue Output

Left speaker negative output

SPKGND1

Supply

Ground for left speaker drivers

SPK_LP

Analogue Output

Left speaker positive output

SPKVDD1

Supply

Supply for left speaker drivers

VMID

Analogue Output

Mid-rail voltage =AVDD/2 (requires decoupling capacitor)

AGND

Supply

Analogue ground (Return path for AVDD)

AVDD

Supply

Analogue supply

HP_R

Analogue Output

Right output (Line or headphone)

HP_L

Analogue Output

Left output (Line or headphone)

VPOS

Analogue Output

Charge pump positive supply decoupling (powers HP_L,

HP_R)

GND_PADDLE

Die Paddle (Note 1)

Note:

It is recommended that the QFN ground paddle should be connected to analogue ground on the application PCB.

Refer to the application note WAN_0118 on “Guidelines on How to Use QFN Packages and Create Associated PCB Footprints”

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