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SPECIFICATION FOR
ELECTRET CONDENSER MICROPHONE
Customer
Customer P/N
BeStar Model Name
Product No.
Issue No.
Issue Date
Approval:
1.Characteristics
2.Appearance
3.Environment Test
4.History change record
Drawn by
Checked by
Approved by
BCM9745P-44
190408
BS/TEM01.061A
08/05/17
Customer approved
No.199 HuangHe West Road.New district,changzhou,
jiangsu Province,P.R.China
Tel:86-519-88222567 Fax:86-519-88222551
Http:www.be-star.com
E-mail: wu@be-star.com, info@be-star.com
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BCM9745P-44
1. Characteristics
Test Condition (Vs=2.5V RL=2.2K Ta=20°c R.H.=65%)
G
F
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No. Item Specifications
1 Sensitivity -44 3dB(0dB=1V/Pa,1kHz)
2 Impedance 2.2K Ω 30% at1kHz
3 Directional Omnidirectional
4 S/N Ratio more than60dB(0dB=1V/Pa,1kHz)
5 Max. Input Sound Level 100dB S.P.L
6
Frequency Response 20Hz-20kHz
7
Rate Voltage 2.5V
Operating Voltage 1.5-10V
8
9
Decreaing Voltage characteristic -3dB(V s=1.5V)
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G
F
E
★Frequency Resonse Curve
D
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
B
Date:
Drawn by:
08/05/17
A
A
Rev.
Date
徐金国
Drawn
Note
Checked by:
Approved by:
08/05/17
徐金国
李毕佳
张秀琴
www.be-star.com wu@be-star.com
BCM9745P-44
Microphone
DRG NO: BS/TEM01.061A
2
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C
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A
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BCM9745P-44
2.Appearance
G
F
E
black cloth
Term 1: Output
Term 2: Ground
Notes:
Tolerances: ±0.2mm
1. Not to scale
2. All dimensions are in millimeters
3. Item to be free of burrs and sharp edges
H
G
F
E
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
D
C
B
A 08/05/17
A
Rev.
Measurement Circuit:
徐金国
DrawnDate
Note
Date:
Drawn by:
Checked by:
Approved by:
08/05/17
徐金国
李毕佳
张秀琴
www.be-star.com wu@be-star.com
BCM9745P-44
Microphone
DRG NO: BS/TEM01.061A
D
C
B
A
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BCM9745P-44
H
3.Environment Test
3.1 High temp.life test
Temperature +70 ℃
G
Duration 200hrs
3.2 Low temp.life test
Temperature -25 ℃
Duration 200hrs
3.3 Temperature cycle test
Cycles 5
F
3.4 Humidity Test
Temperature +40 ℃
Relative Humidity 90~95%
E
Duration 200hrs
Tests above should be measured after leaving normal temperature for 2hrs.
3.5 Vibration Test
Vibration Frequency 10~55Hz
Amplitude 1.52mm/min
Direction 3(x.y&z)
D
Duration 2hrs each cycle(total 6 hrs)
3.6 Drop test
Height 100cm
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
(Dropped to concrete floor in state of packing.)
Direction 3
3.7 Soldering Heat Shock
Temperature 260 ℃ 5
Duration 3±1 sec
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3.8 Terminal Mechanical Strength
Strength 1kg
Duration 1 min
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F
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Notice:
All specifications must be satisfied in this condition.
Sensitivity :Allowable deviation within ±3dB from initial sensitivity.
B
Date:
Drawn by:
08/05/17
A
A
Rev.
Date Drawn
徐金国
Note
Checked by:
Approved by:
08/05/17
徐金国
李毕佳
张秀琴
www.be-star.com wu@be-star.com
BCM9745P-44
Microphone
DRG NO: BS/TEM01.061A
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A
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BCM9745P-44
4. History change record
G
F
E
version
No.
Before
Change Items
After
Date
08.05.17
徐金国
ApprovedDrawn
H
G
张秀琴
F
E
D
and shall not be used in whole or in part without its written content
This print and information there in are proprietary to Bestar Electronics Industry Co., Ltd.
C
B
A 08/05/17 徐金国
A
Rev.
Date
Drawn
Note
Date:
Drawn by:
Checked by:
Approved by:
08/05/17
徐金国
李毕佳
张秀琴
www.be-star.com wu@be-star.com
BCM9745P-44
Microphone
DRG NO: BS/TEM01.061A
2
D
C
B
A
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