規 格 承 認 書
PECIFICATION FOR APPROVAL
客 戶
CUSTOMER
項 目
ITEM
型 號
：
：
立创
单指向驻极½电容咪头（ECM）
TYPE
：
GMI9752U-2C44DB
描述
DESCRIPTION
： φ9.7
x H5.2mm
双电容
客戶料號
CUSTOMER NO.
：C241701
規 格 書 號
SPECIFICATION NO.：
版 本
EDITION NO.
日 期
DATE
：
：
背极式
-44dB
0.68K
1.5V
S/N:
≥58
dBA
V1.0
2019-6-14
客戶承認
CUSTOMER CONFIRM AND SIGN
檢查
TESTED BY
審核
CHECKED BY
承認
APPROVED BY
東莞市赢海電子有限公司
DONGUAN INGHAI ELECTRONICS CO.,LTD
½½
ISSUED BY
審查
CHECKED BY
確認
APPROVED BY
周明
李林
地址：廣東省東莞市長安鎮廈邊元灶頭工業區 16-6 號
電話 /
TEL：0769-83060958
傳真
/ FAX： 0769-81608993
網址：HTTP://WWW.INGHAI.COM
1/5
A. SCOPE
This specification applies electret condenser microphone,
GMI9752U-2C44DB
B. SPECIFICATION
■Test
condition: RL=0.68KΩ VS=1.5V
No.
1
2
3
4
5
6
7
TEMP=25℃±2℃
Specification
Unidirectional
Related humidity=65±5%
Condition
Item
Directivity
Sensitivity
Standard operating voltage
Output impedance
Frequency
Max operating voltage
Sensitivity reduction
Symbol
Unit
S
Vs
Zout
dB
V
KΩ
Hz
V.
-44±3
1.5
≤0.68
100-10,000
10
-3
f=1KHz,0dB=1V/
Pa
f=1KHz, 1Pa
△S-Vs
dB
f=1KHz, 1Pa
vs=3.0VDC to 1.5VDC
8
9
10
11
12
13
14
15
Max. current consumption
Signal to noise ration
Max input sound level
Operation temp.
Storage temp.
Dimension
Terminal
Approvals
I
DSS
mA
≤0.5
S/N
SPL
dBA
dB
℃
℃
mm
≥58
110
-20 ~+70
-30 ~+80
φ9.7xH5.2
Terminal
RoHs FCC
See appearance drawing
See appearance drawing
We use “Pascal(Pa)”indication of sensitivity as per the recommendation of I.E.C.(International Electro technical
Commission)
TheSensitivity of “Pa” will increase 20dB comparing with “ubar” indication
Example: -60dB(0dB=1V/ubar) =-40dB(0dB=1V/Pa)
2/5
C.TYPICAL FREQUENCY RESPONSE CURVE
Frequency Response
Relative Response(dB)
Microphone Response Tolerance Window
Frequency(Hz) Lower Limit(dB) Upper Limit(dB)
100
-5
5
0°
180°
200
800
1000
1200
2000
5000
10000
-5
-5
0
-5
-5
-5
-8
5
5
0
5
5
5
8
D. APPEARANCE DRAWING
Unit: mm
5.2±0.2
9.7±0.1
E. MEASUREMENT CIRCUIT
:680Ω
+V
S
1.5
C
1
C
2
C
1=10
PF
C
2=33
PF
3/5
F.Explode Drawing
防尘½
阻尼纸
塑环
极板
外壳
垫片
振膜
阻尼纸
连接环
单孔极板
电容
G.
可靠性试验
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
周波数
1/Frequency1:10Hz½55Hz
Vibration
振幅/Amplitude:1.52mm
变化/Change
of Frequency:1 octave/min
3
方向,各
2
小时/hours
in each of 3 axes
5-2
高温试验
+60±5℃
for 96 hours
Dry Heat
5-3
½温试验
-20±5℃
for 96 hours
Dry Cold
5-4
高温高湿试验
90%½95%RH,+60±5℃
for 96 hours
Damp Heat
5-5
温度循环试验
-20℃
25℃
60℃
Temperature cycles
(2h) (1h) (2h) (1h) (2h)×10 cycles
5-6
跌½试验
Height:1m
Packing drop test
顺序:三个面各跌
10
次
Procedure:10 times from each of 3 axises
5-7
温度冲击试验
-20℃
60℃
Temperature impact test
30min 30s
30min ×10 cycles
5-8
静电冲击试验
4000V(contact), 8000V(air)
×10
axises
Electrostatic shock test
备注
Note
6-1
工½温度范围
-20℃½60℃
Operation Temperature
6-2
储存温度范围
-30℃½70℃
4/5
Storage Temperature
H.
焊接条件
Soldering Condition
7-1
焊接½用
90W
的烙铁。
The soldering copper of a type of 90W shall be applied
焊接条件
Soldering Condition.
7-2
电烙铁表面温度
320±10℃
The temperature of the working surface of the soldering copper shall be 320±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
2½3
秒内。
time for each terminal shall be 2½3 sec.
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.
7-7
散热板½状
Shape of heat sink
7-8
固定部孔½状
Shape of hole at fixed part
5/5
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