Microphone, Reliability test – BeStar BCMMEMS001A-42 LF User Manual
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10.04.27
DRG NO:
4.1. Simulated Reflow (Without solder):
Samples for qualification testing require a minimum of 3 passes of standard reflow
solder profiles .2 hours of setting time is required between each reflow profile test.
4.2. Static Humidity:
Precondition at +25℃ for 1 hour.Then expose to +70℃ with 90 to 95% relative
humidity for 120 hours.Finally dry at room ambient for 3
±1 hours before taking
final measurement.
4.3. Temperature Shock:
Each cycle shall consist of 15 minutes at -40℃,15 minutes at +85℃ with a 20
seconds maximum transition time .Test duration is for 30 cycle , starting from cold
to hot temperature.
4.4. ESD sensitivity:
Perform ESD sensitivity threshold measurements for each contact according to
MIL-STD-883E,Method 3015 for Human Body Model and for Machine Model.
Identify the ESD threshold levels indicating passage of 2000V Human Body
Model.
4.5. Random Vibrations:
Vibrate randomly from 20 Hz to 2000Hz using the Following Power Spectra
Density(PSD) profile: It is a +3dB/octave .Starting with 0.01325g2/ Hz from 20Hz
to 80Hz ,then 0.053g2/ Hz or 8g's RMS level from 80Hz to the PSD tolerance is
±
3dB from 20Hz to 1000Hz and
±6dB above 1000Hz .The analyzer bandwidth to
be set at 25Hz BW from 20Hz to 2000Hz , 50Hz BW to 1000Hz,and finally 100Hz
BW to 2000Hz ,The test time is 15 minutes per plane.
4.6. Mechanical Shock:
Subject samples to half sine shock pulses(3000 g's
±15% for 0.3ms )in each
direction ,totally 6 shocks.
4.7.Operation Life:
Subject samples to +85
for 168 hours under full rated power.
℃
4.8. Solder Reflow:
One pass through standard solder reflow profile.
4.9.Drop Test:
Samples are fixed inside the fixture and droped naturally from the 2m height onto
a concrete plane in six direction for three times ,total 18 times .The dimension of
test fixture is 102 （L）*54(W)*41(H)mm, and the weight is around 200g.
4.10.Sinusoidal Vibration:
Vibrate randomly from 10Hz to 2000Hz ,1 octave/minute with 2mm amplitude
(peak to peak) for 2 hours in each direction.
4.Reliability Test
Microphone
王焕焕
A
BS/TEM01.159A
10.04.27
王焕焕
徐 波
张秀琴
Acoustics & Sensor
BCMMEMS001A-42 LF
BCMMEMS001A-42 LF