SP0208LE5
13. RELIABILITY SPECIFICATIONS
Note: After test conditions are performed, the sensitivity of the microphone shall not deviate more
than 3dB from its initial value.
Test
Thermal Shock
Description
Microphone unit must operate when exposed to air-to-air thermal shock 100 cycles,
from –40ºC to +125ºC. (IEC 68-2-4),
Microphone unit must maintain sensitivity after storage at +105ºC for 1,000 hours. (IEC
68-2-2 Test Ba)
Microphone unit must maintain sensitivity after storage at –40ºC for 1,000 hours. (IEC
68-2-1 Test Aa)
Microphone unit must operate within sensitivity specifications for 1,000 hours at 105ºC.
(IEC 68-2-2 Test Ba)
High Temperature Storage
Test
Low Temperature Storage
Test
High Temperature Operating
Test
Low Temperature Operating
Test
Humidity Test
Vibration Test
Microphone unit must operate within sensitivity specifications for 1,000 hours at –40ºC.
(IEC 68-2-1 Test Aa)
Tested under Bias at 85ºC/85% R.H. for 1,000 hours. (JESD22-A101A-B)
Microphone unit must operate under test condition: 4 cycles, from 20 to 2,000 Hz in
each direction (x,y,z), 48 minutes, using peak acceleration of 20g (+20%, -0%). (MIL
883E, method 2007.2, A)
Tested to 8kV direct contact discharge to the case and tested to 2kV direct contact to
I/O terminals.
Microphone is tested to 5 passes through reflow oven, with microphone mounted
upside-down under conditions of 260ºC for 30 seconds maximum.
Microphone must operate after exposure to shock test of 10,000 G per IEC 68-2-27, Ea.
Electrostatic Discharge
Reflow
Mechanical Shock
Knowles Acoust ics, a division of Knowles
Elect r onics, LLC.
Revision: B
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