文档介绍：Microphone PNM-2751L-R . . . 1/30/2006 - Designed by Checked by Approved by Drawn Date 1 / 1 Edition Sheet Date 9/22/2010 Date 1/30/2006 Date 1/30/2006 UNLESS OTHERWISE SPECIFIED: DIMENSIONS ARE IN MILLIMETERS, TOLERANCES ARE ± AND ANGLES ARE ±3°. PNM-2751L- A3 SIZE REVISION HISTORY LTR DESCRIPTION DATE APPROVED - RELEASED FROM ENGINEERING 1/30/2006 A ADDED TERMINAL POLARITY 2/1/2007 . B REVISED ELECTRICAL PARAMETERS 2/4/2010 . C REVISED TO INVENTOR 3-D DRAWING TEMPLATE 9/22/2010 . SPECIFICATIONS PARAMETERS VALUES UNIT DIRECTIVITY NOISE CANCELLING - SENSITIVTY -51 ± 4 dB STANDARD OPERATING VOLTAGE 2 Vdc MAX OPERATING VOLTAGE 10 Vdc CURRENT CONSUMPTION (MAX) mA IMPEDANCE KOhm SIGNAL TO NOISE RATIO (MIN.) 55 dB MAXIMUM SOUND INPUT 110 dB OPERATING TEMPERATURE -20 ~ +70 °C STORAGE TEMPERATURE -40 ~ +85 °C TERMINAL SOLDER PADS - INTERNAL CAPACITOR N/A pF T