Specification of Electret Condenser Microphone Model No.: EM9745, EM9745P Date: 2010-7-28 APPROVER CHECKER DESIGN Hu Guo Feng REN WEI XIA YING BO APPROVER CHECKER DESIGN 211 N. First Street Minneapolis, MN. 55401 612-849-6205 www.soberton.com / [email protected] GC090902A Page 1 of 6 Type: Omnidirectional Foil Electret Condenser Microphone Model Number: EM9745,EM9745P 1. Electrical Characteristics （Temperature =20±2℃ No Parameter 1.1 1.2 1.3 Sensitivity Output impedance Current Consumption S Z out IDSS 1.4 Signal to Noise Ratio S/N 1.5 5 1.7 Decreasing Voltage Operating Voltage Maximum input S.P.L ΔS 2. Symbol Condition Min. 0dB=1V/Pa，at 1kHz f=1kHz VCC =3.0V,RL=2.2KΩ at 1kHz S.P.L=1Pa (A-Weighted Curve) VCC=3.0V to2.0V -48 Limits Center Max. -46 -44 2.2 500 58 Unit dB KΩ µA dB -3 dB Typical Frequency Response Curve Frequency Response 3. Humidity=65±5%） Microphone Response Tolerance Window Frequency(Hz) Lower Limit(dB) Upper Limit(dB) 50 100 800 1000 1200 3000 5000 10000 -6 -3 -3 0 -3 -3 -3 -8 +3 +3 +3 0 +3 +8 +8 +8 Measurement Circuit RL=2.2KΩ VS =3.0V C=1µF GC090902A Page 2 of 6 1.0 110 10 dB V 4. Measurement Setup Drawing 5. Appearance And Dimension Unit：mm 6. Material And Structure 8 FET 7 PCB 6 Chamber 1 5 Electret Plate 1 4 Spacer 1 3 Diaphragm 1 2 Case Al-Mg alloy 1 1 Dustproof gauze Non-weave cloth 1 Name material No. 1 FR4 1 QTY Remark GC090902A Page 3 of 6 7. Temperature Conditions Storage Temperature Range -40℃ ~ Operation Temperature Range +75℃ -20℃ ~ +60℃ 8. Terminal Mechanical Strength Terminal should be no interference in operation after pulled the terminal with 1kg for 1 minute. 9. Reliability Test After each of following test, the sensitivity of the microphone should be within ±3dB of initial sensitivity after 3hours of conditioning at 20℃. 1. Vibration Test Frequency : 10Hz~55Hz Amplitude : 1.52mm Change of Frequency : 1 octave/min 2 hours in each of axes 2. High Temperature Test +70℃ for 72 hours. 3. Low Temperature Test -20℃ for 72 hours. 4. Humidity Test 90%～95%RH,+40℃ for 240 hours. 5. Temperature Cycles -20℃ (2h) (1h) 25℃ 70℃ (2h) (1h) (2h) (2h) -20℃ for 10 cycles. 6 Packing Drop Test Height：1m Procedure: 5 times from each of axes 10. Soldering Condition 1. We suggest using anti-static welding machine which can control soldering temperature automatically. 2. Soldering temperature should be controlled under 320℃ and sec.. 3. Microphone should be fixed on the metal block (heat sink), which has high radiation effects, and heat sink shall contact with MIC tightly. 4. Microphone may easily be destroyed by the static electricity and the countermeasure for eliminating the static electricity shall be executed (worktable and human body shall be ground connection). soldering time for each terminal should be 1~2 GC090902A Page 4 of 6 5. Heat Sink Shape of heat sink Shape of hole at fixed part 11. Code Explanation NAME EXPLANATION Omni-directional Mic Foil Electret D= 9.7mm T=4.5mm PCB version No.3 Dash Sensitivity –46±2dB Test Condition 2.2KΩ／3.0V Dash PIN=5.0mm NO Capacitance Dash NO RUBBER Dash No especial require GC090902A Page 5 of 6 Packing 12. Packing chart 1. MODEL NUMBER ： EM9745,EM9745P 2. DIMENSION:(LENGTH*WIDTH *HEIGHT) 2.1 ANTI- STATIC SPONGE : 100mm*100mm*10mm 2.2 SMALL BOX 100mm*100mm*17mm 2.3 MIDDLE BOX: 450mm*280mm*135mm 2.4 CARTON SIZE: 550mm*230mm*235mm 3. QUANTITY AND WEIGHT 3.1 100P CS/SMALL BOX 3.2 6000PCS/MID BOX 3.3 12000PCS/CARTON 3.4 1PC=0.7g 3.5 NET WEIGHT：8.4kg 3.6 GROSS WEIGHT：12kg 100PCS X60 4. LABEL STIPULATION 41.1 CONTENTS SHOULD BE SEEN CLEAR. 6000PCS X2 12000PCS GC090902A Page 6 of 6