規 格 承 認 書
SPECIFICATION
客 戶
CUSTOMER
:
項 目
ITEM
:
型 號
TYPE
:
客戶料號
CUSTOMER NO. :
規 格 書 號
SPECIFICATION
版 本
立创
咪头
BL-MP9745-38dB
FOR
APPROVAL
NO. :
1.1
EDITION NO.
:
客戶料號
CUSTOMER NO. :
日 期-
DATE
:
2018-07-20
客
戶
認
可
CUSTOMER'S APPROVED SIGNATURE
東莞市博林電子有限公司
DONGUAN BOLIN ELECTRONICS CO.,LTD
HTTP://WWW.BOLIN.COM.HK
地址: 廣東省東莞市长安鎮鑫伟润高新科技产业园
Address: XinWeiRun high tech Industrial Park , Chang'an Town, DongGuan City,GuangDong
Province,China
电话专线/TEL:0769-
81871887
確認
APPROVED
BY
傳真/FAX:0769-81769981
½½
BY
ISSUED
BY
審查
CHECKED
石磊
zhang
1/4
A. SCOPE
This specification applies electret condenser microphone,BL-MP9745-38dB
B. SPECIFICATION
■Test
condition: RL=2.2KΩ
No.
1
VS=4.5V TEMP=25℃±2℃
Unit
Specification
Omnidirectional
Related humidity=65±5%
Condition
Item
Directivity
Symbol
2
Sensitivity
S
dB
-38±3
f=1KHz,0dB=1V/
Pa
3
Standard operating voltage
Vs
V
4.5
4
Output impedance
Zout
KΩ
≤2.2
f=1KHz, 1Pa
5
Max operating voltage
V.
10
f=1KHz, 1Pa
6
Sensitivity reduction
△S-Vs
dB
-3
vs=4.5VDC to 3.0VDC
7 Max. current consumption
I
DSS
mA
≤0.5
8
Signal to noise ration
S/N
dBA
℃
≥58
9
Operation temp.
-10 ~+60
10
Storage temp.
℃
-20 ~+60
11
Dimension
mm
φ9.7x4.5
See appearance drawing
12
Terminal
Terminal
See appearance drawing
2/4
传声器信赖性试验
Reliability
Test
经过以下所有试验在
20℃的条件下放½ 3
小时后,麦克风的灵敏度与试验前比较变化在±3DB 以内
After any following tests, the sensitivity of the microphone to be within
±
3DB of initial sensitivity after 3hours of
conditioning at 20℃
5-1
振动试验
Vibration
周波数
1/Frequency1:10Hz½55Hz
振幅/Amplitude:1.52mm
变化/Change
of Frequency:1 octave/min
3
方向,各
1
小时/hours
in each of 3 axes
+70℃
for 72 hours
5-2
高温试验
Dry Heat
5-3
½温试验
Dry Cold
5-4
高温高湿试验
Damp Heat
5-5
温度循环试验
Temperature cycles
5-6
跌½试验
Packing drop test
焊接条件
Soldering Condition.
-20℃
for 72 hours
90%½95%RH,+40℃
for 72 hours
-20℃
(0.5h)
25℃
70℃
(10
minutes)
(0.5h)
- 20℃
(10
minutes
)ⅹ5 cycles
Height:1m
顺序:三个面各跌
1
次
Procedure:1 times from each of 3 axises
7-2
电烙铁表面温度½于
300℃±10℃
The temperature of the working surface of the soldering copper shall be below 300℃±10℃
7-3
焊接时把麦克风嵌入散热½力强的金属块内。
ECM shall be soldered fixed on the metal block(heat sink)which has the higher radiation effects said heat sink
Shall contact with of ECM .
7-4
焊接时间控制在
3
秒内。
time for each terminal shall be3sec.
7-5
焊接后不½出现针孔。
The pinhole after soldering shall be avoided.
7-6
静电容易破坏麦克风必须采取措½避免（电烙铁接地，戴静电环等。
）
ECM may easily destroyed by the static electricity and the countermeasure for eliminating the static electricity(the ground for
soldering copper, for worktable and for human body)shall be executed.
4/4
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