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ADMP521 Dataheets PDF



Part Number ADMP521
Manufacturers Analog Devices
Logo Analog Devices
Description Ultralow Noise Microphone
Datasheet ADMP521 DatasheetADMP521 Datasheet (PDF)

Data Sheet FEATURES Ultralow Noise Microphone with Bottom Port and PDM Digital Output ADMP521 FUNCTIONAL BLOCK DIAGRAM ADMP521 ADC PDM MODULATOR CLK DATA Small and thin 4 mm × 3 mm × 1 mm surface-mount package Omnidirectional response Very high SNR: 65 dBA Sensitivity of −26 dBFS Extended frequency response from 100 Hz to 16 kHz Low current consumption: 900 µA Sleep mode for extended battery life, <1 µA consumption 120 dB maximum SPL High PSR of −80 dBFS Fourth-order Σ-Δ modulator Digital PDM .

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Data Sheet FEATURES Ultralow Noise Microphone with Bottom Port and PDM Digital Output ADMP521 FUNCTIONAL BLOCK DIAGRAM ADMP521 ADC PDM MODULATOR CLK DATA Small and thin 4 mm × 3 mm × 1 mm surface-mount package Omnidirectional response Very high SNR: 65 dBA Sensitivity of −26 dBFS Extended frequency response from 100 Hz to 16 kHz Low current consumption: 900 µA Sleep mode for extended battery life, <1 µA consumption 120 dB maximum SPL High PSR of −80 dBFS Fourth-order Σ-Δ modulator Digital PDM output Compatible with Sn/Pb and Pb-free solder processes RoHS/WEEE compliant POWER MANAGEMENT CHANNEL SELECT L/R SELECT GND VDD Figure 1. APPLICATIONS Smartphones and feature phones Tablet computers Teleconferencing systems Digital still and video cameras Bluetooth headsets Notebook PCs Security and surveillance 10141-001 BOTTOM TOP Figure 2. Isometric Views of ADMP521 Microphone Package http://www.DataSheet4U.net/ GENERAL DESCRIPTION The ADMP5211 is a high performance, ultralow noise, low power, digital output, bottom-ported omnidirectional MEMS microphone. The ADMP521 consists of a MEMS microphone element and an impedance converter amplifier followed by a fourth-order sigma-delta (Σ-Δ) modulator. The digital interface allows for the pulse density modulated (PDM) output of two microphones to be time-multiplexed on a single data line using a single clock. The ADMP521 is function and pin compatible with the ADMP421 microphone, providing an easy upgrade path. The ADMP521 has a very high signal-to-noise ratio (SNR) and common sensitivity of −26 dBFS, making it an excellent choice for far field applications. The ADMP521 has an extended wideband frequency response resulting in natural sound with high intelligibility. Low current consumption and a sleep mode with less than 1 µA current consumption enables long battery life for portable applications. The ADMP521 complies with the TIA-920 Tele-communications Telephone Terminal Equipment Transmission Requirements for Wideband Digital Wireline Telephones standard. The ADMP521 is available in a thin 4 mm × 3 mm × 1 mm surface-mount package. It is reflow solder compatible with no sensitivity degradation. The ADMP521 is halide free. 1 Protected by U.S. Patents 7,449,356; 7,825,484; 7,885,423; 7,961,897. Other patents are pending. Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarks and registered trademarks are the property of their respective owners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2012 Analog Devices, Inc. All rights reserved. datasheet pdf - http://www.DataSheet4U.net/ 10141-011 ADMP521 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Timing Characteristics ................................................................ 4 Absolute Maximum Ratings ............................................................ 5 ESD Caution .................................................................................. 5 Pin Configuration and Function Descriptions ............................. 6 Typical Performance Characteristics ............................................. 7 Theory of Operation ........................................................................ 8 PDM Data Format ........................................................................ 8 PDM Microphone Sensitivity ..................................................... 8 Connecting PDM Microphones ................................................. 9 Data Sheet Sleep Mode .....................................................................................9 Start-Up ..........................................................................................9 Applications Information .............................................................. 10 Interfacing with Analog Devices Codecs ................................ 10 Supporting Documents ............................................................. 10 PCB Design and Layout ................................................................. 11 Alternative PC.


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