WM9708 Просмотр технического описания (PDF) - Wolfson Microelectronics plc

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WM9708

AC’97 Revision 2.1 Audio Codec

Wolfson Microelectronics plc 

WM9708

Advanced Information

Test Characteristics:

AVDD = 5V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated

DVDD = 3.3V, GND = 0V …………..TA = 0oC to +70oC, unless otherwise stated

PARAMETER

SYMBOL TEST CONDITIONS

MIN

Mixer Circuit Specifications (AVDD = 3.3V) 48kHz sampling

SNR CD path A-weighted

(Note 1)

SNR Other paths A-weighted

(Note 1)

Maximum input voltage

Maximum output voltage on

LINEOUT

THD (Note 2)

-3.6dBv input

Frequency response (+/-1dB)

20

Input impedance (CD inputs)

At any gain

Input impedance (other Mixer

inputs)

At max gain

At 0db gain

Input impedance MIC inputs

At max gain

At 0db gain

PSRR

20 to 20kHz

Clock Frequency Range

Crystal clock

BITCLK frequency

SYNC frequency

TYP

95

90

0.6

1.2

85

15

20

100

30

110

50

24.576

12.288

48.0

MAX

20,000

UNIT

dB

dB

Vrms

Vrms

dBv

Hz

kohm

kohm

kohm

kohm

kohm

dB

MHz

MHz

kHz

Notes:

1. SNR is the ratio of 0dB signal output to the output level with no signal, measured A-weighted over a 20Hz to 20kHz

bandwidth.

2. Inputs are scaled for AVDD eg; 0dBv at 5.0V is equivalent to –3.6dBv at 3.3V.

WOLFSON MICROELECTRONICS LTD

AI Rev 2.0 April 2001

6

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