WM8978 Wolfson Microelectronics Ltd., WM8978 Datasheet - Page 6

• Manufacturer Part Number: WM8978
• Description: The WM8978 is a low power, high quality stereo codec designed for portable applications such as Digital still camera or Digital Camcorde
• Manufacturer: Wolfson Microelectronics Ltd.

PARAMETER
Digital supply range (Core)
Digital supply range (Buffer)
Analogue core supply range
Analogue output supply range
Ground
WM8978
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.
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.
DBVDD, DCVDD, AVDD supply voltages
SPKVDD supply voltage
Voltage range digital inputs
Voltage range analogue inputs
Operating temperature range, T
Storage temperature after soldering
Notes:
1.
2.
3.
4.
5.
RECOMMENDED OPERATING CONDITIONS
Notes:
1.
w
Analogue and digital grounds must always be within 0.3V of each other.
All digital and analogue supplies are completely independent from each other.
Analogue supply has to be
In non-boosted mode, SPKVDD should = AVDD, if boosted SPKVDD should be
When using PLL, DCVDD should be
When using the PLL, DCVDD must not be less than 1.9V.
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.
CONDITION
A
to digital.
DGND, AGND,
SPKGND
SPKVDD
SYMBOL
DCVDD
DBVDD
1.9V.
AVDD
CONDITIONS
TEST
DGND -0.3V
AGND -0.3V
-25 C
-65 C
-0.3V
-0.3V
1.71
1.5x AVDD.
1.71
MIN
MIN
2.5
2.5
1
TYP
0
PTD Rev 2.6 November 2005
Preliminary Technical Data
DVDD +0.3V
AVDD +0.3V
MAX
3.6
3.6
3.6
5.5
+150 C
+3.63V
+85 C
MAX
+7V
UNIT
V
V
V
V
V
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