WM9715L
REFERENCE VOLTAGES
Production Data
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
Audio ADCs, DACs, Mixers
Reference Input/Output
Buffered Reference Output
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
V
MICBIAS
I
MICBIAS
Vn
1K to 20kHz
15
2.88
2.97
3.06
3
V
mA
nV/√Hz
CAP2 pin
VREF pin
1.6
1.6
1.65
1.65
1.7
1.7
V
V
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DIGITAL INTERFACE CHARACTERISTICS
Test Conditions
o
DBVDD = 3.3V, DCVDD = 3.3V, T
A
= +25 C, unless otherwise stated.
PARAMETER
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:
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)
24.576
12.288
48
MHz
MHz
kHz
SYMBOL
V
IH
V
IL
V
OH
V
OL
source current = 2mA
sink current = 2mA
DBVDD×0.9
DBVDD×0.1
TEST CONDITIONS
MIN
DBVDD×0.7
DBVDD×0.3
TYP
MAX
UNIT
V
V
Digital Logic Levels (all digital input or output pins) – CMOS Levels
w
PD Rev 4.0 December 2007
10
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
