Page 1
Unidirectional Electret Condenser Microphone
Customer
Customer P/O
BeStar Model Name
BCM9750-47U
Product No. 191800
Issue No.
Issue Date
BS/TEM01.044A
04/05/08
Approval:
1. Characteristic
2. Appearance
3. Environment Test
BESTAR ELECTRONICS INDUSTRY CO.,LTD
TianAn Industry Park4/F,Site B ChangZhou New District
Tel:86-519-5103228
Fax:86-519-5131010
Http:www.be-star.com
E-Mail:bestarco@pub.cz.jsinfo.net
Page 2
BeStar
65
H
BCM9750-47U
43
1. Characteristics
Test Condition (Vs=1.5V RL=680ohm
G
F
E
No. Item Specifications
1 Sensitivity -47
2 Impedance Less than 680ohm
3 Directional Unidirectional
5 S/N Ratio more than 60dB(0dB=1V/Pa,1kHz)
6 Decreaing Voltage Characteristic -3dB(Vs=1.5V)
7 Frequency Response 100Hz~16kHz
8 Rated Voltage 1.5V
9 Max. Voltage 10V
2
Ta=20 C R.H.=65%)
4dB(0dB=1V/Pa,1kHz)(L=50cm)
1
H
G
F
E
Frequency Resonse Curve
+30
+10
D
and shall not be used in whole or in part without its written cont ent
C
This print and information therein are propreitary to Bestar Electr onics Industry Co . , Ltd.
B
0
-10
-20
-30
Relative Response (dB)
20
0
180
50050 200100
1k 2k 5k 10k 20k
D
C
B
DATE
DATE
DATE
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BCM9750-47U
3rd angle
projection
Microphone
A
DRG NO
BS/TEM01.044A
4
3
2
1
Bestar Electronics
A
.
DIS
CHEC.
APPR.
BESTAR ELECTRONICS INDUSTRY CO.,LTD
TianAn Industry Park 4/F,Site B ChangZhou New District
E-Mail:bestarco@ pub.cz.jsinfo.net Http:www.be-star.com
6
5
Page 3
BeStar
6
BCM9750-47U
H
2.Appearance
G
9.7
F
Measurement Circuit:
54321
H
mesh
Terminal 1
Terminal 2
5.0
G
F
E
F
RL
C:1
Output
Power Supply Vs
Earth
+
-
FET impedance
Converter
ECM unit
D
Shield Case
and shall not be used in whole or in part without its written content
C
This prin t and inform a tion there in are propreitary to Bestar Electroni cs Industry Co., Ltd.
B
Terminal 1
Terminal 2
E
D
C
B
A
DIS
.
CHEC.
APPR.
DATE
DATE
DATE
BESTAR ELECTRONICS INDUSTRY CO.,LTD
TianAn Industry Park 4/F,Site B ChangZhou New District
E-Mail:bestarco@ pub.cz.jsinfo.net Http:www.be-star.com
6
543
Page:2 of 3
3rd angle
projection
BCM9750-47U
Microphone
DRG NO
BS/TEM01.044A
2
A
1
Bestar Electronics
Page 4
BeStar
65 4
BCM9750-47U
H
3.Environment Test
3.1 High temp.life test
Temperature +70 C
Duration 200hrs
3.2 Low temp.life test
G
F
E
D
and shall not be used in whole or in part without its written content
Temperature -25 C
Duration 200hrs
3.3 Temperature cycle test
Cycles 5
3.4 Humidity Test
Temperature +40 C
Relative Humidity 90~95%
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)
Duration 2hrs each cycle(total 6 hrs)
3.6 Drop test
Height 100cm
(Dropped to concrete floor in state of packing.)
Direction 3
3.7 Soldering Heat Shock .
Temperature 260 5 C
Duration 3 1 sec
-25 C
+20 C +20 C
+70 C
30min
10min30min 10min
3
21
H
G
F
E
D
C
This print and information therein are propreitary to Bestar Electronics Industry Co., Ltd.
Notice:
All specifications must be satisfied in this condition.
C
Sensitivity :Allowable deviation within 3dB from initial sensitivity.
B
A
DIS
.
CHEC.
APPR.
DATE
DATE
DATE
BESTAR ELECTRONICS INDUSTRY CO.,LTD
TianAn Industry Park 4/F,Site B ChangZhou New District
E-Mail:bestarco@ pub.cz.jsinfo.net Http:www.be-star.com
65 4
Page:2 of 2
3rd angle
projection
3
BCM9750-47U
Microphone
DRG NO
BS/TEM01.044A
21
Bestar Electronics
B
A
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