參數(shù)資料
型號: WM9712LEFV
廠商: Wolfson Microelectronics
元件分類: Codec
英文描述: AC97 Audio and Touchpanel CODEC
中文描述: AC97音頻編解碼器和觸摸屏
文件頁數(shù): 10/78頁
文件大?。?/td> 689K
代理商: WM9712LEFV
WM9712L
REFERENCE VOLTAGES
Production Data
w
PD Rev 4.0 December 2003
10
Test Conditions
DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, T
A
= +25
o
C, 1kHz signal, fs = 48kHz, 18-bit audio data unless otherwise stated.
PARAMETER
SYMBOL
TEST CONDITIONS
Audio ADCs, DACs, Mixers
Reference Input/Output
CAP2 pin
Buffered Reference Output
VREF pin
Microphone Bias
Bias Voltage
V
MICBIAS
Bias Current Source
I
MICBIAS
Output Noise Voltage
Vn
1K to 20kHz
MIN
TYP
MAX
UNIT
1.6
1.6
1.65
1.65
1.7
1.7
V
V
2.88
2.97
15
3.06
3
V
mA
nV/
Hz
DIGITAL INTERFACE CHARACTERISTICS
Test Conditions
DBVDD = 3.3V, DCVDD = 3.3V, T
A
= +25
o
C, unless otherwise stated.
PARAMETER
Digital Logic Levels (all digital input or output pins) – CMOS Levels
Input HIGH level
Input LOW level
Output HIGH level
Output LOW level
Clock Frequency
Master clock (XTLIN pin)
AC’97 bit clock (BIT_CLK pin)
AC’97 sync pulse (SYNC pin)
Note:
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DBVDD
×
0.7
DBVDD
×
0.9
V
V
DBVDD
×
0.3
DBVDD
×
0.1
source current = 2mA
sink current = 2mA
24.576
12.288
48
MHz
MHz
kHz
1.
2.
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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