【手机用硅麦克风贴片硅咪】价格_厂家

品牌

MIC

型号

BM4737DT-L

换能方式

压电式

灵敏度

-25~-19dB

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，而且更可靠
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	℃
Storage Temperature	In Tape and Reel	-10		+50	℃