INMP441

TABLE OF CONTENTS

General Description ................................................................................................................................................... 1

Applications ............................................................................................................................................................... 1

Features ..................................................................................................................................................................... 1

Functional Block Diagram .......................................................................................................................................... 1

Ordering Information................................................................................................................................................. 1

Table of Contents.............................................................................................................................................................. 2

Specifications .................................................................................................................................................................... 4

Table 1. Electrical Characteristics .............................................................................................................................. 4

Table 2. I2S Digital Input/Output Characteristics ....................................................................................................... 5

Table 3. Serial Data Port Specifications ..................................................................................................................... 5

Timing Diagram.......................................................................................................................................................... 5

Absolute Maximum Ratings.............................................................................................................................................. 6

Table 4. Absolute Maximum Ratings ......................................................................................................................... 6

ESD Caution ............................................................................................................................................................... 6

Soldering Profile......................................................................................................................................................... 7

Table 5. Recommended Soldering Profile*................................................................................................................ 7

Pin Configurations And Function Descriptions ................................................................................................................. 8

Table 6. Pin Function Descriptions............................................................................................................................. 8

Typical Performance Characteristics................................................................................................................................. 9

Theory of Operation ....................................................................................................................................................... 10

Understanding Sensitivity........................................................................................................................................ 10

Power Management ................................................................................................................................................ 10

Normal Operation...................................................................................................................................................10

Standby Mode.........................................................................................................................................................10

Power-Down Mode.................................................................................................................................................10

Startup ....................................................................................................................................................................10

I²S Data Interface ..................................................................................................................................................... 11

Data Output Mode..................................................................................................................................................11

Data Word Length...................................................................................................................................................11

Data-Word Format..................................................................................................................................................11

Digital Microphone Sensitivity................................................................................................................................. 12

Synchronizing Microphones .................................................................................................................................... 13

Digital Filter Characteristics..................................................................................................................................... 13

High-Pass Filter ........................................................................................................................................................ 13

Table 7. High Pass Filter Characteristics .................................................................................................................. 13

Low-Pass Filter ......................................................................................................................................................... 13

Applications Information ................................................................................................................................................ 15

Page 2 of 21

Document Number: DS-INMP441-00

Revision: 1.1