product specification doc: MD9745APZ-F this specification applies to the electret condenser microphone outlined within this document. model number: MD9745APZ-F 4.5 x ii. mechanical characteristics item symbol test condition minimum standard maximum units sensitivity s f=1khz, pin=1pa db 0db=1v/pa impedance zout k ? directivity current consumption i ma s/n ratio s/n (a) f=1khz, pin=1pa a curve db sensitivity reduction ? s db frequency range -44 -46 -42 f=1khz, pin=1pa 2.2 omni-directional 0.5 55 -3 100-10,000 hz frequency response schematic diagram of circuit dimensions 9.7 ? i. electrical characteristics see drawing in section iv weight 1.0 less than g solderering heat shock to be no interferance in operation after sol dering temperature exposure at 260c +/-5c for 2 +/- 0.5 seconds. terminal mechanical strength not applicable absolute maximum ratings 10 operating voltage storage temperature range vs (v) tstg c -25c to +60c f=1khz, pin=1pa vs= 2.0 1.5 - test condition (vs= v, rl= k ohm, ta=20c, rh=65%) 2.0 2.2 operation temperature range tope c -25c to +55c issued date: 2004/6/10 version: a
product specification doc: MD9745APZ-F iii. reliability tests vibration test the microphone to have no interferance in operat ion after vibrations, 10hz to 55hz for 1 minute full amplitude 1.52mm, for 2 hours at three axises. drop test the microphone unit must operate when dropped three times once on each axis from a height of 1m onto a metal plate. temperature test the microphone unit must operate within it s sensitivity specifications after subjected to the following conditions: +60c for 240 hrs, and exposed to room temperature for 2 hrs. the microphone unit must operate within it s sensitivity specifications after subjected to the following conditions: -25c for 240 hrs, and exposed to room temperature for 2 hrs. high low humidity test +40c at 95%rh for 240 hrs temperature cycle test after exposure at -25c for 30 minutes, at+20 c for 10 minutes, at +60c for 30 minutes, at +20c for 10 minutes, 5 cycles. (the measurem ent to be done after 2 hrs of conditioning at +20c.) after any of the following tests performed, the sensitivity of the microphone unit shall not deviate more than 3db from its initial value. the microphone shall maintain its initial operation and appearance. measurements for tests with thermal requirements are to be done after 2hrs of condistioning at 20c. note: iv. dimensional drawing the information contained in this literature is based on our ex perience to date and is believed to be reliable and it is subjec t to change without notice. it is intended as a guide for use by persons having technical skill at their own discret ion and risk. we do not guarantee favora ble results or assume any liability in connection with its use. dim ensions contained herein are fo r reference purposes only. for specific dimensional r equirements consult factory. this publication is not to be taken as a license to operate under, or re commendation to infringe any existing patents . this supersedes and voids all previous literature. v. other issued date: 2004/6/10 version: a
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