WM8991 datasheet(21/174 Pages) WOLFSON

21 / 174 page

Pre-Production

WM8991

PP, May 2008, Rev 3.1

Test Conditions

DCVDD = 1.8V, DBVDD = 3.3V, AVDD = HPVDD = 3.3V, SPKVDD = 5V, TA = +25

oC, 1kHz signal, fs = 48kHz,

PGA gain = 0dB, 24-bit audio data unless otherwise stated.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Headset Voice Call:

Tx Voice and Rx Voice Separation

1kHz full scale differential input on

RXP/RXN via RXVOICE to LOMIX

and ROMIX, output to LOUT and

ROUT; Quiescent input on LIN12

or RIN12 (Gain=+12dB),

differential output to LOP/LON or

ROP/RON; Measure crosstalk at

LOP/LON or ROP/RON output

+12dB

LIN12 or RIN12

(Single-ended or

differential mode)

0dB

LOPMIX or

ROPMIX

0dB

LOAD

0dB

LOMIX

ROMIX

Full scale

input

Quiescent input

RXVOICE

LIN1 or

RIN1

LIN2 or

RIN2

RXN

RXP

LOUT

ROUT

LOP or

ROP

LON or

RON

Stereo Line Record and Playback:

DAC/Headset to ADC Separation

-5dBFS input to DACs, playback

to LOUT and ROUT1; ADC record

from line input; Measure crosstalk

on ADC output

-5dBFS,

1kHz

-5dBFS,

1kHz

ROMIX

DACR

LOUTVOL

0dB

DACL

LOMIX

ROUTVOL

0dB

INMIXL or

INMIXR

ADCL or

ADCR

CROSSTALK

Quiescent

input

LOUT

ROUT

LIN2, LIN4,

RIN2 or RIN4

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