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WM7231E Datasheet(PDF) 4 Page - Wolfson Microelectronics plc

Part No. WM7231E
Description  Bottom Port Digital Silicon Microphone
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM7231E Datasheet(HTML) 4 Page - Wolfson Microelectronics plc

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WM7231
Pre-Production
w
PP, Rev 3.0, January 2014
4
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-020 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.
MSL2A = out of bag storage for 4 weeks 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
Supply Voltage (VDD)
-0.3V
+4.2V
Voltage range digital inputs (LRSEL and CLK)
GND-0.3V
VDD+0.3V
Operating temperature range, TA
-40ºC
+100ºC
Storage temperature prior to soldering
30
C max / 60% RH max
Storage temperature after soldering
-40ºC
+100ºC
IMPORTANT ASSEMBLY GUIDELINES
Do not put a vacuum over the port hole of the microphone. Placing a vacuum over the port hole can damage the device.
Do not board wash the microphone after a re-flow process. Board washing and the associated cleaning agents can damage
the device. Do not expose to ultrasonic cleaning methods.
Do not use vapour phase re-flow process. The vapour can damage the device.
Please refer to application note WAN0273 (MEMS MIC Assembly and Handling Guidelines) for further assembly and
handling guidelines.
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
Digital Supply Range
VDD
1.62
3.7
V
Ground
GND
0
V
Clock Frequency
FCLK
1
3.25
MHz


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