概述 硅麦克风BM4737DT-L的应用范围广泛,在生医器材方面可应用在:助听器、电子耳;在数码产业上则可应用于:手机、数位相机、蓝牙、笔记型电脑等。随着电子产业的蓬勃发展以及制程及封装技术的进步,硅麦克风产品的设计上更朝向多功能化的需求发展,为求达到短、小、轻、薄、省电、便宜的诉求,我们就必需发展可以和半导体制程所做出之晶片做整合的微小麦克风,这是未来麦克风发展的一大趋势 特点 体积较小、更稳定、更统一,而且更** 能轻易与其他微型电路整合 PERFORMANCE Parameter Conditions Min Typ Max Unit Directivity Omni-Directional Sensitivity @ 1KHz ( 0 dB= 1 V/Pa) -25 -22 -19 dBFS Signal-to-Noise Ratio @ 1KHz ( 0 dB= 1 V/Pa) 61 dB(A) Total Harmonic Distortion(THD)@100dB SPL @ 1KHz 0.2 0.5 % Total Harmonic Distortion(THD)@115dB SPL @ 1KHz 0.5 1 % Max Input Sound Pressure @ 1KHz, THD < 10% 130 dB SPL Power Supply Rejection (PSR) 217Hz,100m Vpp Square wave -70 -65 dBFS INPUT CHARACTERISTICS Operating Frequency 1.024 2.048 3.072 MHz Clock Duty Cycle 40 50 60 % Power supply Voltage 1.6 3.6 V Sensitivity Loss Across Power Supply Voltage Change in sensitivity from 1.6V to 3.6V power supply voltage No change dB Total Operation Current 1.6V-3.6V power supply voltage No load on DATA 850 1000 μA Standby Current 1.6V-3.6V power supply voltage, Clock off 2 μA OUTPUT CHARACTERISTICS LOAD Capacitance 100 pF Short Circuit Output Current @ 1KHz ( 0 dB= 1 V/Pa) 1 10 mA Data Format 1/2 CyCle 1-bit PDM Lid to Ground Resistance 100 Ω 注意事项 Supply voltage: VDD to GND...-0.3V~5V L/R,CLOCK,DATA Voltage to GND...-0.3~(VDD+0.3V) ESD Tolerance The Lid Mode...............8kV The I/O Pin Mode...............4kV TEMPERATURE CHARACTERISTICS Parameter Conditions Min Typ Max Unit Operating Temperature -40 +85 ℃ Storage Temperature Solder on PC board -40 +105 ℃ In Tape and Reel -10 +50 ℃ 外形结构 ITEM DIMENSION TOLERANCE UNITS LENGTH(L) 4.72 ±0.100 mm WIDTH(W) 3.76 ±0.100 mm HEIGHT(H) 1.25 ±0.100 mm ACOUSTIC PORT(AP) Φ0.84 ±0.100 mm PIN OUTPUT PIN# FUNCTION 1 ENHANCE 2 CS 3 GROUND(GND) 4 CLOCK(CLK) 5 DATA 6 POWER(VDD) 产品应用 电脑 智能手机 线控耳麦、耳机 平板电脑 电子书 摄像机 媒体播放器 手提游戏机 **定位系统