WM9705 datasheet(9/55 Pages) WOLFSON

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WM9705

Production Data

PD Rev 4.4 August 2006

Test Characteristics:

AVDD = 3.3V, DVDD = 3.3V, 48kHz audio sampling, TA = 25

oC, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Mixer Inputs to Line-out (10k

Ω load)

Maximum input voltage

AGND

0.7

AVDD

Vrms

Maximum output voltage

on LINEOUT

0.7

Vrms

CD inputs

Signal to Noise Ratio

A-weighted (Note 2)

SNR

Other inputs

CD and LINE inputs

-87

0.0044

-77

0.014

PHONE input

-82

0.008

-71

0.028

MIC1 input

-82

0.008

-71

0.028

MIC2 input

-90

0.003

-71

0.028

Total Harmonic Distortion +

Noise

-1dBfs input

THD+N

PCBEEP input

-78

0.013

-67

0.045

Input impedance (CD inputs)

At any gain

Ω

At max gain

Ω

Input impedance (other mixer

inputs)

At 0db gain

100

Ω

At max gain

Ω

Input impedance MIC inputs

At 0db gain

100

Ω

Power Supply Rejection Ratio

PSRR

20 to 20kHz, without

supply decoupling

-40

Headphone Buffer (pins HPOUTL, HPOUR and MONOOUT)

Maximum output voltage

0.7

Vrms

RL = 32

Ω

Max Output Power (Note 1)

RL = 16

Ω

SNR (Note 2)

A-weighted

1kHz, RL = 32

Ω @ PO =

10mW rms

-80

0.01

1kHz, RL = 32

Ω@ PO =

20mW rms

-77

0.014

1kHz, RL = 16

Ω @ PO =

10mW rms

-76dB

0.016

Total Harmonic Distortion +

Noise

THD+N

1kHz, RL = 16

Ω@ PO =

20mW rms

-75dB

0.018

Power Supply Rejection Ratio

PSRR

20 to 20kHz, without

supply decoupling

-40

Clocks

Crystal clock

24.576

MHz

BITCLK frequency

12.288

MHz

SYNC frequency

48.0

KHz

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