4-6负载阻抗

Operating Impedance

2.2KΩ

4-7基准电压

Standard Power Supply

2.0V

4-8操作电压

Operating Voltage

D.C1-10V

(sensitivity Reduction: Within -3DB at 1.5V Compare to 3.0V)

4-9频响特性

Frequency

50-16,000HZ

4-10消耗电流

Current Consumption

Max.0.5mA

4-11信噪比

S/N Ratio

More than 42DB

4-12最大输入声压

Max input sound level

110DB SPL

4-13周波数特性   Typical Frequency Response Curve

                                   全指向性

4-14回路图    Test Circuit

信赖性试验  Reliability  Test

经过以下所有试验在20℃的条件下放置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/Frequency1:10Hz～55Hz

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

Dry Heat

+70℃ for 72 hours

5-3低温试验

Dry Cold

-20℃ for 72 hours

5-4高温高湿试验

Damp Heat

90%～95%RH,+40℃ for 240 hours

5-5温度循环试验

Temperature cycles

-20℃     25℃       70℃      -20℃

(2h) (1h) (2h) (1h) (2h) (2h)ⅹ10 cycles

5-6跌落试验

Packing drop test

Height:1m

顺序:三个面各跌5次

Procedure:5 times from each of 3 axises

备注Note

6-1动作温度范围

Operation Temperature

-40℃～75℃

6-2保存温度范围

Storage Temperature

-40℃～75℃

焊接条件

Soldering Condition

7-1焊接使用13W～20W的烙铁。

The soldering copper of a type of 13W～20W shall be applied

7-2电烙铁表面温度低于320℃

The temperature of the working surface of the soldering copper shall be below 320℃

7-3焊接时把麦克风嵌入散热能力强的金属块内。

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1～2秒内。

time for each terminal shall be 1～2 sec.

7-5焊接后不能出现针孔。

The pinhole after soldering shall be avoided.

7-6静电容易破坏麦克风必须采取措施避免（电烙铁接地，戴静电环等。）

ECM may easily destroyed by the static electricity and the countermeasure for eliminating the staticelectricity(the ground for soldering copper, for worktable and for human body)shall be executed.