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1.SCOPE   范圍

This specification shall be applied to electret condenser microphone(ECM)
本規(guī)格說明書適用于駐極體傳聲器

2.MODEL NO. 產(chǎn)品型號

H9745W005A-56DB

3.ELECTRICAL CHARACTERISTICS  電氣特性

Temp. 環(huán)境溫度

20 ± 2℃

Room Humidity 相對濕度

65 ± 5﹪

4.MEASUREMENT CIRCUIT  測試電路 

5. TYPICAL FREQUENCY RESPONSE CURVE (FAR FIELD)  頻響曲線
    Far Field Measurement Condition  自由場測試條件
    Temperature 溫度 ：  20   ± 2 ℃
    Bias Voltage 基準(zhǔn)電壓：  3.0V (with 2.2K Ω series resistor 2.2KΩ電阻)
    Acoustic stimulus :1Pa (94Db SPL at 1 KHZ ) at 50cm from the loud-speaker.
    聲音條件：The loud-speaker must be calibrated to make a flat frequency response input signal
    距離揚(yáng)聲器50cm出產(chǎn)生1Pa聲壓。 揚(yáng)聲器必須先用標(biāo)準(zhǔn)輸入信號事先校準(zhǔn)。
    Position: The frequency response of microphone unit measured at 50cm from the loud-speaker
    位置 ：   揚(yáng)聲器距離待測話筒50cm. 

6.DIMENSIONAL DRAWING  外形圖

7.RELIABILITY TEST  可靠性測試

7.1 VIBRATION TEST 振動測試
    

To be no interference in operation after vibrations. 10Hz to 50Hz for 1 minrte full amplitude 1.52mm , for 2 hours at three axises
  1分鐘頻率變化從10Hz到50Hz，振幅在1.52mm，在三個方向測試振動2小時(shí)，產(chǎn)品應(yīng)不受影響

7.2 DROP TEST   跌落測試

To be no interference in operation after dropped to concrete floor each one time from 1meterheight at three directions in state of packing
以正規(guī)包裝的三個方向從1米高處自由落到混凝土地面時(shí)，產(chǎn)品應(yīng)不受影響

7.3 TEMPERATURE TEST   溫度測試   

-After exposure at 60℃ for 72 hours ,sensitivity to be within ±3dB from initial sensitivity
在60℃環(huán)境中維持72小時(shí)，靈敏度偏離范圍在±3dB.
(The measurement to be done after 2 hours of conditioning at room temperature 測試在室內(nèi)溫度下放2小時(shí)后進(jìn)行）
-After exposure at -20 ℃ for 72hours,sensitivity to be within ±3dB from initial sensitivity
在-20 ℃環(huán)境中維持72小時(shí)，靈敏度偏離范圍在±3dB.
(The measurement to be done after 2 hours of conditioning at room temperature測試在室內(nèi)溫度下放2小時(shí)后進(jìn)行）

7.4 HUMIDITY TEST   濕度測試       

After exposure at 40℃ and 90 to 95﹪ relative humidity for 72 hours ,sensitivity to be within ±3dB from initial sensitivity
   在40℃溫度和90-95﹪相對濕度的環(huán)境下持續(xù)72小時(shí)，靈敏度偏離范圍在±3dB.

7.5 TEMPERATURECYCLE TEST 溫度交變測試       

After exposure at -20℃ for 30 minutes,at 20℃for 10 minutes,at 60℃ for 30minutes, at 20℃ for 10 minrtes.5 cycles ,sensitivity to be within ±3dB from initial sensitivity
  在-20℃下持續(xù)30分鐘，在20℃下持續(xù)10分鐘，在60℃時(shí)持續(xù)30分鐘，在20℃時(shí)持續(xù)10分鐘，以上過程循環(huán)5次，靈敏度偏離范圍在±3dB.
 (The measurement to be done after 2 hours of conditioning at room temperature 測試在室內(nèi)溫度下放2小時(shí)后進(jìn)行）

7.6 TEMPERATURE SHOCK   溫度沖擊

Temperature change from -20℃ to 60℃ for 30 minures. (changing time :20 sec)After 32 cycles,sensitivity to be within ±3dB from initial sensitivity
在20秒內(nèi)溫度從-00℃變化到60℃,持續(xù)30分鐘, 靈敏度偏離范圍在±3dB.
 (The measurement to be done after 2 hours of conditioning at room temperature測試在室內(nèi)溫度下放2小時(shí)后進(jìn)行)

8 TEMPERATURE CONDITIONS  溫度條件

8.1 STORAGE TEMPERATURE  貯存溫度：

-25℃ ～ +65℃

8.2 OPERATING TEMPERATURE  操作溫度：

-20℃ ～ +60℃

9.MEASUREMENT SYSTEM  測量系統(tǒng)

10.REGARDING THE SOLDERING OPERATION  焊接注意事項(xiàng)
Every ECM contains a FET with microphone boby.This FET is easy to damageable from excessive heat and electrical shock.Proper attention for the soldering work is required same as followings.
每個ECM都包含有個FET.FET在過熱和電流沖擊下容易損壞。應(yīng)遵循以下焊接操作規(guī)程：

1 -Recommend to use 15W ～ 30W ceramic soldering iron and apply 330±20℃temperature range
推薦使用功率在15W-30W，溫度變化范圍在330±20℃的陶瓷電烙鐵。

2 -Soldering should be accomplished within 2 seconds at each terminal so as not to be overheated.
為防止過熱，焊接應(yīng)在2秒內(nèi)完成。

3 -ECM shall be soldered fixed on the metal block(heat sink)which has the higher radiation effects. Heat sink shall contact with each of ECM.
應(yīng)把駐極體傳聲器固定在散熱良好的金屬裝置（散熱板）上進(jìn)行焊接.

4 -The pin hole soldering shall be avoided.
焊接后，各焊點(diǎn)不應(yīng)出現(xiàn)砂眼（焊錫小孔）現(xiàn)象.

5 -E.C.M 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.
駐極體傳聲器容易受靜電破壞，應(yīng)采取防靜電措施（焊接器具，工作臺，操作人員人體應(yīng)接地）

No.
序號

Part name
部件名稱

Materials Type
材料型號

Qty
數(shù)量

Origin
產(chǎn)地

Manufacture
協(xié)力廠商

Remarks
備注

1

P.C.B

Carton

1

China

Suzhou

2

Plastic Ring

ABS

1

China

Changshu

3

FET

2SK596

1

China

Beijing

4

Back  plate

Copper blank

1

China

Changshu

5

Spacer

Mylar

1

China

Hebei

6

Diaphragm

FEP

1

USA

Dupont

7

FELT

Fabric cloth

1

China

Dongguan

8

Case

AL

1

China

Shanghai