ADI ADMP441高性能低功耗数字MEMS麦克风解决方案

ADI公司的ADMP441是高性能低功耗数字输出全方位的MEMS麦克风,包括有MEMS传感器,信号调理,ADC,抗混淆滤波器,电源管理以及工业标准的24位I2S接口,并直接连到数字处理器如DSP和MCU.SNR为61 BA,灵敏度为−26 dBFS,平坦的频率响应60Hz到15kHz,主要用在远程会议,游戏控制台,移动设备,笔记本电脑,平板电脑和安全系统.本文介绍了ADMP4411主要特性,方框图,系统框图和评估板子板EVAL-ADMP441Z电路图,材料清单.
The ADMP4411 is a high performance, low power, digital output, omnidirectional MEMS microphone with a bottom port. The complete ADMP441 solution consists of a MEMS sensor, signal conditioning, an analog-to-digital converter, antialiasing filters, power management, and an industry standard 24-bit I2S interface. The I2S interface allows the ADMP441 to connect directly to digital processors, such as DSPs and microcontrollers, with-out the need for an audio codec in the system.
The ADMP441 has a high SNR and high sensitivity, making it an excellent choice for far field applications. The ADMP441 has a flat wideband frequency response, resulting in natural sound with high intelligibility. A built-in particle filter provides high reliability.
The ADMP441 is available in a thin 4.72 mm × 3.76 mm × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The ADMP441 is halide free.
ADMP4411主要特性:
Digital I²S interface with high precision 24-bit data
High SNR of 61 dBA
High sensitivity of −26 dBFS
Flat frequency response from 60 Hz to 15 kHz
Low current consumption of 1.4 mA
High PSR of −75 dBFS
Small 4.72 mm × 3.76 mm × 1 mm surface-mount package
Compatible with Sn/Pb and Pb-free solder processes
RoHS/WEEE compliant
ADMP4411应用:
Teleconferencing systems
Gaming consoles
Mobile devices
Laptops
Tablets
Security systems

 图1.ADMP4411功能框图

图2.ADMP4411系统框图
评估板子板EVAL-ADMP441Z
EVAL-ADMP441Z SDP Daughter Board for the ADMP441 I2S MEMS Micr...