Omnidirectional Microphone with 2 Bottom Port and I S Digital Output Data Sheet ADMP441 FEATURES FUNCTIONAL BLOCK DIAGRAM Digital IS interface with high precision 24-bit data ADMP441 High SNR of 61 dBA FILTER ADC SCK 2 I S High sensitivity of 26 dBFS SERIAL SD PORT Flat frequency response from 60 Hz to 15 kHz POWER HARDWARE WS MANAGEMENT CONTROL 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 Figure 1. APPLICATIONS Teleconferencing systems Gaming consoles Mobile devices Laptops Tablets Security systems BOTTOM TOP Figure 2. Isometric Views of ADMP441 Microphone Package GENERAL DESCRIPTION 1 The ADMP441 is a high performance, low power, digital output, The ADMP441 has a high SNR and high sensitivity, making it omnidirectional MEMS microphone with a bottom port. The an excellent choice for far field applications. The ADMP441 has complete ADMP441 solution consists of a MEMS sensor, signal a flat wideband frequency response, resulting in natural sound conditioning, an analog-to-digital converter, antialiasing filters, with high intelligibility. power management, and an industry standard 24-bit IS inter- The ADMP441 is available in a thin 4.72 mm 3.76 mm face. The IS interface allows the ADMP441 to connect directly 1 mm surface-mount package. It is reflow solder compatible to digital processors, such as DSPs and microcontrollers, with- with no sensitivity degradation. The ADMP441 is halide free. out the need for an audio codec in the system. 1 Protected by U.S. Patents 7,449,356 7,825,484 7,885,423 and 7,961,897. Other patents are pending. Rev. B Document Feedback 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 20112012 Analog Devices, Inc. All rights reserved. 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. Technical Support www.analog.com OBSOLETE V DD GND GND GND CHIPEN L/R 09568-001 09568-015ADMP441 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Understanding Sensitivity ............................................................8 Applications ....................................................................................... 1 Power Management.......................................................................8 Functional Block Diagram .............................................................. 1 Startup .............................................................................................8 General Description ......................................................................... 1 IS Data Interface ..........................................................................8 Revision History ............................................................................... 2 Digital Filter Characteristics ..................................................... 10 Specifications ..................................................................................... 3 Applications Information .............................................................. 11 IS Digital Input/Output .............................................................. 4 Power Supply Decoupling ......................................................... 11 Timing Diagram ........................................................................... 4 Handling Instructions................................................................ 11 Absolute Maximum Ratings ............................................................ 5 Supporting Documentation ...................................................... 11 ESD Caution .................................................................................. 5 Layout and Design Recommendations ........................................ 12 Pin Configuration and Function Descriptions ............................. 6 Outline Dimensions ....................................................................... 13 Typical Performance Characteristics ............................................. 7 Ordering Guide .......................................................................... 13 Theory of Operation ........................................................................ 8 REVISION HISTORY 10/12Rev. A to Rev. B 1/12Rev. 0 to Rev. A Changes to General Description Section ...................................... 1 Changes to Circuit Note Title ....................................................... 11 Changes to Pick-and-Place Equipment Section, Evaluation Updated Outline Dimensions ....................................................... 13 Board User Guide Section, Circuit Note Section, and Deleted Figure 18 ............................................................................ 13 Application Note Section ............................................................... 11 10/11Revision 0: Initial Version Rev. B Page 2 of 16 OBSOLETE