SSM4321

Data Sheet

Rev. 0 | Page 2 of 24

TABLE OF CONTENTS

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

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

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

Revision History ............................................................................... 2

Functional Block Diagram .............................................................. 3

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

Digital Input/Output Specifications........................................... 5

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

Thermal Resistance ...................................................................... 6

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

Pin Configuration and Function Descriptions............................. 7

Typical Performance Characteristics ............................................. 8

Theory of Operation ...................................................................... 14

Overview...................................................................................... 14

Power-Down Operation ............................................................ 14

Gain Selection............................................................................. 14

Pop-and-Click Suppression....................................................... 14

Output Modulation Description .............................................. 14

EMI Noise.................................................................................... 15

Output Current Sensing ............................................................ 15

Output Voltage Sensing ............................................................. 15

PVDD Sensing............................................................................ 15

Serial Data Input/Output............................................................... 16

TDM Operating Mode .............................................................. 16

I2S and Left Justified Operating Mode .................................... 16

Multichip I2S Operating Mode ................................................. 17

PDM Output Mode.................................................................... 17

Timing Diagrams, TDM Mode ................................................ 18

Timing Diagrams, I2S and Left Justified Modes..................... 18

Timing Diagrams, Multichip I2S Mode................................... 19

Timing Diagrams, PDM Mode................................................. 20

Applications Information .............................................................. 21

Layout .......................................................................................... 21

Input Capacitor Selection.......................................................... 21

Power Supply Decoupling ......................................................... 21

Outline Dimensions....................................................................... 22

Ordering Guide .......................................................................... 22

REVISION HISTORY

10/12—Revision 0: Initial Version