WM8904 Datasheet, PDF (10/188 Pages) Wolfson Microelectronics plc – Ultra Low Power CODEC for Portable Audio Applications

WM8904
Pre-Production
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously
operating at or beyond these limits. Device functional operating limits and guaranteed performance specifications are given
under Electrical Characteristics at the test conditions specified.
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible
to damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage
of this device.
Wolfson tests its package types according to IPC/JEDEC J-STD-020B for Moisture Sensitivity to determine acceptable storage
conditions prior to surface mount assembly. These levels are:
MSL1 = unlimited floor life at <30C / 85% Relative Humidity. Not normally stored in moisture barrier bag.
MSL2 = out of bag storage for 1 year at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
MSL3 = out of bag storage for 168 hours at <30C / 60% Relative Humidity. Supplied in moisture barrier bag.
The Moisture Sensitivity Level for each package type is specified in Ordering Information.
CONDITION
MIN
MAX
AVDD, DCVDD
DBVDD,
-0.3V
-0.3V
+2.5V
+4.5V
MICVDD
CPVDD
-0.3V
-0.3V
+4.5V
+2.2V
HPOUTL, HPOUTR, LINEOUTL, LINEOUTR
(CPVDD + 0.3V) * -1
CPVDD + 0.3V
Voltage range digital inputs
Voltage range analogue inputs
DGND -0.3V
AGND -0.3V
DBVDD +0.3V
AVDD +0.3V
Temperature range, T_A
Storage temperature after soldering
-40C
-65C
+85C
+150C
Notes:
1. Analogue and digital grounds must always be within 0.3V of each other.
2. All digital and analogue supplies are completely independent from each other; there is no restriction on power supply
sequencing.
3. HPOUTL, HPOUTR, LINEOUTL, LINEOUTR are outputs, and should not normally become connected to DC levels.
However, if the limits above are exceeded, then damage to the WM8904 may occur.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
Digital supply range (Core)
DCVDD
0.95
1.0
1.98
V
Digital supply range (Buffer)
DBVDD
1.42
1.8
3.6
V
Analogue supplies range
AVDD
1.71
1.8
2.0
V
Charge pump supply range
CPVDD
1.71
1.8
2.0
V
Microphone bias
MICVDD
1.71
2.5
3.6
V
Ground
DGND, AGND, CPGND
0
V
Operating Temperature (ambient)
T_A
-40
+25
+85
C
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PP, Rev 3.3, September 2012
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