wm9712l Wolfson Microelectronics plc, wm9712l Datasheet - Page 10

• Manufacturer Part Number: wm9712l
• Description: Ac?97 Audio And Touchpanel Codec
• Manufacturer: Wolfson Microelectronics plc

WM9712L
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REFERENCE VOLTAGES
DIGITAL INTERFACE CHARACTERISTICS
Note:
1.
2.
Test Conditions
DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, T
Audio ADCs, DACs, Mixers
Reference Input/Output
Buffered Reference Output
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
Test Conditions
DBVDD = 3.3V, DCVDD = 3.3V, T
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)
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)
PARAMETER
PARAMETER
A
CAP2 pin
VREF pin
SYMBOL
SYMBOL
= +25
V
I
MICBIAS
MICBIAS
V
V
V
Vn
V
OH
OL
IH
IL
o
C, unless otherwise stated.
A
= +25
source current = 2mA
TEST CONDITIONS
TEST CONDITIONS
sink current = 2mA
1K to 20kHz
o
C, 1kHz signal, fs = 48kHz, 18-bit audio data unless otherwise stated.
DBVDD×0.9
DBVDD×0.7
2.88
MIN
MIN
1.6
1.6
24.576
12.288
1.65
1.65
2.97
TYP
TYP
15
48
DBVDD×0.3
DBVDD×0.1
PD Rev 4.5 August 2006
MAX
MAX
3.06
1.7
1.7
3
Production Data
nV/√Hz
UNIT
UNIT
MHz
MHz
kHz
mA
V
V
V
V
V
10