WM9713LGEFLSLASHV datasheet(11/108 Pages) WOLFSON

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Pre-Production

WM9713L

PP Rev 3.0 June 2006

DIGITAL INTERFACE CHARACTERISTICS

Test Conditions

DBVDD = 3.3V, DCVDD = 3.3V, TA = +25

oC, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Digital Logic Levels (all digital input or output pins) – CMOS Levels

Input HIGH level

VIH

DBVDD

×0.7

Input LOW level

VIL

DBVDD

×0.3

Output HIGH level

VOH

source current = 2mA

DBVDD

×0.9

Output LOW level

VOL

sink current = 2mA

DBVDD

×0.1

Clock Frequency

Master clock (MCLKA pin)

24.576

MHz

AC’97 bit clock (BIT_CLK pin)

12.288

MHz

AC’97 sync pulse (SYNC pin)

kHz

Note:

All audio and non-audio sample rates and other timing scales proportionately with the master clock.

For signal timing on the AC-Link, please refer to the AC’97 specification (Revision 2.2)

POWER CONSUMPTION

The power consumption of the WM9713L depends on the following factors:

•

Supply voltages: Reducing the supply voltages also reduces digital supply currents, end therefore results in

significant power savings especially in the digital sections of the WM9713L.

•

Operating mode: Significant power savings can be achieved by always disabling parts of the WM9713L that are

not used (e.g. audio ADC, DAC, touchpanel digitiser).

•

Sample rates: Running at lower sample rates will reduce power consumption significantly. The figures below are

for 48kHz (unless otherwise specified), but in many scenarios it is not necessary to run at this frequency, e.g.

8kHz PCM voice call scenario uses only 11.4mW (see below).

MODE DESCRIPTION

AVDD

Supply

Current

V / mA

DCVDD

Supply

Current

V / mA

DBVDD

Supply

Current

V / mA

Total

Power

(mW)

Off (lowest possible power)

Clocks stopped. This is the default configuration after power-up.

3.3

0.01

3.3

0.005

0.05

LPS (Low Power Standby)

VREF maintained using 1MOhm string

3.3

0.014

3.3

0.005

0.06

Touchpanel only (waiting for pen-down)

3.3

0.042

3.3

0.005

0.15

PCM Voice call (fs=8kHz)

2.8

2.37

2.8

1.7

2.8

0.006

11.4

Record from mono microphone

3.3

3.644

3.3 10.973 3.3

2.974

58.05

Stereo DAC Playback (AC link to headphone)

3.3

3.733

3.3

9.720

3.3

2.789

53.60

Stereo DAC Playback (AC link to headphone)

PLL running with 13MHz input to MCLKB

3.3

4.801

3.3 10.504 3.3

2.814

59.79

Maximum Power - everything on

3.3 13.656 3.3 15.472 3.3

2.938 105.82

Table 1 Supply Current Consumption

Notes:

Unless otherwise specified, all figures are at TA = +25C, audio sample rate fs = 48kHz, with zero signal (quiescent), and

voltage references settled.

The power dissipated in the headphone, speaker and touchpanel is not included in the above table.

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