tie深圳市青興電子有限公司 SHEN ZHEN QINGXING ELECTRONIC CO.LCD ECM APPROVAL SHEET客 戶CUSTOMER 北京國基科技產(chǎn)品型號SPECIFICATIONS DT-A6050外型尺寸DIMENSIONAL6.05.0靈 敏 度SENSITIVITY-333dB (0dB=1V/Pa,at 1KHz)2.0V 2.2KVENDORCUSTOMERCHECKED BYISSUED BYAPPROVED BY李正朱玲公司地址：深圳寶安西鄉(xiāng)九圍路209號電話真址：編號:1408026TYPE: DT-A60501. ELECTRICAL CHARACTERISTICS TEMP=202 Room Humidity=655%PARAMETERSYMBOLCONDITIONLIMITSUNITMinCenterMaxSensitivitySf=1KHZ, S.P.L=1Pa0dB=1V/Pa-36-33-30dBOutput impedanceZoutf=1KHZ2.2KCurrent ConsumptionIDssVS=3.0V RL=2.2K500ADirectivityOmnidirectionalSignal to Noise RatioS/NS:(f=1KHz,S.P.L=1Pa)N:(A-Weighted curve)42dBDecreasing VoltageS-VSVs=3.0V to2.5V-3dBOperating voltage1.010VMaximum input S.P.L110dB1.2 TYPICAL FREQUENCY RESPONSE CURVE2. MEASUREMENT CIRCUIT 4.STRUCTURE OF MICROPHONEITEMPART NAMEMATERIALQTYSUPPLIER1P.C.BBAKELITE EPOXY1LOCAL2CHAMBERPOM1LOCAL3SPACERPOLYESTER1LOCAL4SCREENNON-FIBRECORD1LOCAL5DIAPHRAGMFEP AND BRASS1U.S.A6PLATEBRASS1LOCAL7CASEALUMINUM1LOCAL8FET2SK5961LOCALREMARK： In order to keep forerunner of the product, our company carry out the layout upgrade and the color Adjustment after the technique renew, no further notice will be given, if have any doubt, please contact our marketing department to consult.The color difference is because of different purchase batch and the product function will not be affected, So it does not regards as acceptance standard. 3. APPEARANCE & DIMENSIONSECM;DT-A6050 Unit:mm 5.MECHANICAL CHARACTERISTICS Soldering Heat ShockTo be no interference in operation after soldering Heat shock, temperature 30020 for 21secondsTerminal Mechanical StrengthTo be no interference in operation after pulled the terminal with 0.5 kg strength for 3 seconds.6. RELIABILITY TESTAll tests are to be carried out on the same test batch in the order listed.The sensitivity to be within 3dB of initial sensitivity after 3 hours of conditioning at 20.Temperature TestAfter exposure at 60 for 200 hours, ,the sensitivity to be within 3dB from the initial value.After exposure at 25 for 200 hours the sensitivity to be within 3dB from the initial value.Humidity TestAfter exposure at 40 and 9095% relative humidity for 200 hours, the sensitivity to be within 3dB from the initial sensitivity.Temperature Cycle TestAfter exposure at 25 for 30 minutes, at 20 for 10 minutes, at +60 for 30 minutes, at 20 for 10 minutes, 5 cycles, the sensitivity to be within 3dB from the initial sensitivity.Vibration TestTo be no interference in operation after vibrations,10Hz to 50Hz for 1 minute full amplitude 1.52mm,for 2 hours at 3 axises.Drop TestTo be no interference in operation after dropped to concrete floor each one time from 1 meter height at three directions in state of packing. 7. CONCEPT OF UNITThe difference between concept of unit “Pascal” and the one of unit “bar” can be explained as follows. In calibrating the sensitivity of ECMs,The sensitivity is manifested differently according as the unit is “Pascal” or “bar”. That is , the sensitivity will be increased by 20 dB in the usage of unit “Pascal”.Example:-60dB(0dB=1V/bar)=-40dB(0dB=1V/Pa)8.SENSITIVITY STANDARD TESTING8.1 SENSITIVITY8.2 REQUEST : The tolerance of sensitivity is not over +/- 3dB to standard microphone.8.3 TESTING WAY : 8.3.1Testing microphone with standard operating condition.8.3.2 Put the microphone and standard microphone to face the sound output place(speaker), the distance from sound output to microphone & standard microphone is 50cm. And keep the center distance 5cm between each other to ensure the sound pressure change should be keep in +/- 1dB.8.3.3 Keep the output sound pressure in +/- 1dB from speaker.(Tested by standard microphone)8.3.4 The sensitivity of microphone is getting its output voltage when sound output keep in 1000Hz & 0.1Pa.9. REGARDING THE SOLDERING OPERATIONTHE STORAGE, TRANSPORTATION AND USING GUIDE OF CONDENCER MICROPHONE9.1 Testing Condition In Normal WeatherEnvironment Temperature:5 +35CRelative Humidity:45 85%Air Pressure: 86 106KpaIn Arbitrate WeatherEnvironment Temperature:20 +/- 2CRelative Humidity:60 70%Air Pressure: 86 106Kpa10. Every Mic. has installed FET., The FET. is easy broken by strong heat and static electricity, so when you working on, pls be attention that :Recommend using constant branding iron in 15 30W, and in temperature range 280 320C.Soldering time not over 3 seconds.Dont stay any hole or dust when soldering.To avoid the Mic. be broken by static electricity, the people and working station should install preventstatic electricity equipment.Pls using the easy dissipate heat material (Such as Aluminum) to be the soldering plate. The appearance as follow : A good package will help Mic. on using normal transportation. Pls pay more attention to preventhumid, shake, sunlight and heavy press.11. TEMPERATURE CONDITONS The full packed Mic. should be store at warehouse in 20 70C, and