WM9715L datasheet(10/77 Pages) WOLFSON

10 / 77 page

WM9715L

Production Data

PD Rev 4.0 December 2007

REFERENCE VOLTAGES

Test Conditions

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

oC, 1kHz signal, fs = 48kHz, 18-bit audio data unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Audio ADCs, DACs, Mixers

Reference Input/Output

CAP2 pin

1.6

1.65

1.7

Buffered Reference Output

VREF pin

1.6

1.65

1.7

Microphone Bias

Bias Voltage

VMICBIAS

2.88

2.97

3.06

Bias Current Source

IMICBIAS

Output Noise Voltage

1K to 20kHz

nV/

√Hz

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 (XTLIN 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)

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