WM8985GEFLSLASHR datasheet(8/121 Pages) WOLFSON

8 / 121 page

WM8985

Production Data

PD, Rev 4.6, July 2009

ELECTRICAL CHARACTERISTICS

Test Conditions

DCVDD=1.8V, AVDD1=AVDD2=DBVDD=3.3V, TA = +25

oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Microphone Input PGA Inputs (LIP, LIN, RIP, RIN, L2, R2)

INPPGAVOLL, INPPGAVOLR, PGABOOSTL and PGABOOSTR = 0dB

Full-scale Input Signal Level –

Single-ended input via LIN/RIN 1

AVDD/3.3

Vrms

Full-scale Input Signal Level –

Pseudo-differential input 1,2

AVDD*0.7/

3.3

Vrms

Input PGA equivalent input noise

INPPGAVOLL/R = +35.25dB

No input signal

0 to 20kHz

150

μV

LIN, RIN input resistance

INPPGAVOLL and

INPPGAVOLR = +35.25dB

1.6

LIN, RIN input resistance

INPPGAVOLL and

INPPGAVOLR = 0dB

LIN, RIN input resistance

INPPGAVOLL and

INPPGAVOLR = -12dB

LIP, RIP input resistance

All gain settings

L2, R2 input resistance

L2_2INPPGA and

R2_2INPPGA = 1

L2_2BOOSTVOL and

R2_2BOOSTVOL = 000

L2, R2 input resistance

L2_2INPPGA and

R2_2INPPGA = 0

L2_2BOOSTVOL and

R2_2BOOSTVOL = +6dB

L2, R2 input resistance

L2_2INPPGA and

R2_2INPPGA = 0

L2_2BOOSTVOL and

R2_2BOOSTVOL = 0dB

L2, R2 input resistance

L2_2INPPGA and

R2_2INPPGA = 0

L2_2BOOSTVOL and

R2_2BOOSTVOL = -12dB

Input Capacitance

All analogue input pins

Maximum Input PGA Programmable

Gain

Gain adjusted by

INPPGAVOLL and

INPPGAVOLL

+35.25

Minimum Input PGA Programmable

Gain

Gain adjusted by

INPPGAVOLL and

INPPGAVOLL

-12

Programmable Gain Step Size

Guaranteed monotonic

0.75

Input PGA Mute Attenuation

INPPGAMUTEL and

INPPGAMUTER = 1

100

Input Gain Boost

PGABOOSTL and

PGABOOSTR = 0

Input Gain Boost

PGABOOSTL and

PGABOOSTR = 1

+20

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