ADMP521

Data Sheet

Rev. A | Page 2 of 16

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

Sleep Mode.....................................................................................9

Start-Up ..........................................................................................9

Applications Information .............................................................. 10

Interfacing with Analog Devices Codecs................................ 10

Supporting Documents ............................................................. 10

PCB Design and Layout................................................................. 11

Alternative PCB Land Patterns................................................. 12

PCB Material and Thickness .................................................... 12

Handling Instructions.................................................................... 13

Pick-and-Place Equipment ....................................................... 13

Reflow Solder.............................................................................. 13

Board Wash ................................................................................. 13

Reliability Specifications................................................................ 14

Outline Dimensions....................................................................... 15

Ordering Guide .......................................................................... 15

REVISION HISTORY

4/12—Rev. 0 to Rev. A

Changes to General Description Section ...................................... 1

Changed Supply Voltage Min Parameter from 1.65 V to 1.8 V... 3

Changed 500 Hours to 1000 Hours in Table 7............................ 14

2/12—Revision 0: Initial Version