TABLE OF CONTENTS
General Description ........................................................................................................................................................ 1
Functional Block Diagram ............................................................................................................................................... 1
Applications .................................................................................................................................................................... 1
Features .......................................................................................................................................................................... 1
Ordering Information ...................................................................................................................................................... 1
Table of Contents ............................................................................................................................................................ 2
Specifications .................................................................................................................................................................. 4
Table 1. Electrical Characteristics ................................................................................................................................... 4
Table 2. Timing Characteristics ....................................................................................................................................... 5
Timing Diagram ............................................................................................................................................................... 5
Absolute Maximum Ratings ............................................................................................................................................ 6
Table 3. Absolute Maximum Ratings .............................................................................................................................. 6
ESD Caution ..................................................................................................................................................................... 6
Soldering Profile .............................................................................................................................................................. 7
Table 4. Recommended Soldering Profile* ..................................................................................................................... 7
Pin Configurations And Function Descriptions ............................................................................................................... 8
Table 5. Pin Function Descriptions .................................................................................................................................. 8
Typical Performance Characteristics ............................................................................................................................... 9
Theory Of Operation ..................................................................................................................................................... 10
PDM Data Format ......................................................................................................................................................... 10
Table 6. INMP621 Channel Setting ............................................................................................................................... 10
PDM Microphone Sensitivity ........................................................................................................................................ 11
Dynamic Range Considerations .................................................................................................................................... 12
Connecting PDM Microphones ..................................................................................................................................... 12
Sleep Mode ................................................................................................................................................................... 14
Start-Up Time ................................................................................................................................................................ 14
Supporting Documents ................................................................................................................................................. 15
Evaluation Board User Guide ........................................................................................................................................ 15
application Note (product Specific) .............................................................................................................................. 15
Application Notes (general) .......................................................................................................................................... 15
PCB Design And Land Pattern Layout ........................................................................................................................... 16
Alternative PCB Land Patterns ...................................................................................................................................... 17
PCB Material And Thickness ......................................................................................................................................... 17
Handling Instructions .................................................................................................................................................... 18
Pick And Place Equipment ............................................................................................................................................ 18
Reflow Solder ................................................................................................................................................................ 18
Page 2 of 21
Document Number: DS-INMP621-00
Revision: 1.1
Rev Date: 05/21/2014
