SSM2804

Rev. 0 | Page 2 of 36

TABLE OF CONTENTS

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

 

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

 

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

 

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

 

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

 

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

 

I2C Timing Characteristics.......................................................... 6

 

Absolute Maximum Ratings............................................................ 7

 

Thermal Resistance ...................................................................... 7

 

ESD Caution.................................................................................. 7

 

Pin Configuration and Function Descriptions............................. 8

 

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

 

Theory of Operation ...................................................................... 13

 

Pop-and-Click Suppression....................................................... 13

 

Output Modulation Description .............................................. 13

 

Hardware-Based Headphone Limiter...................................... 14

 

Activating or Deactivating the Emission Limiting Circuitry...14

 

Automatic Level Control (ALC)............................................... 14

 

Typical Application Circuits.......................................................... 17

 

I2C Software Control Interface...................................................... 19

 

Register Map.................................................................................... 20

 

Register Map Details ...................................................................... 21

 

Input Channel Mode Control, Address 0x00 ......................... 21

 

Channel A Line Input Volume, Address 0x01........................ 22

 

Channel B Line Input Volume, Address 0x02 ........................ 23

 

Channel C Line Input Volume, Address 0x03........................ 24

 

Class-D Left Loudspeaker Output Volume, Address 0x04... 25

 

Class-D Right Loudspeaker Output Volume, Address 0x05... 26

 

Left Headphone Output Volume, Address 0x06 .................... 27

 

Right Headphone Output Volume, Address 0x07 ................. 28

 

Headphone Input Mixer Control, Address 0x08.................... 29

 

Class-D Input Mixer Control, Address 0x09 .......................... 29

 

ALC Control 1, Address 0x0A.................................................. 30

 

ALC Control 2, Address 0x0B .................................................. 31

 

ALC Control 3, Address 0x0C .................................................. 32

 

Power-Down Control, Address 0x0D...................................... 32

 

Additional Control, Address 0x0E........................................... 34

 

Chip Status Register, Address 0x0F.......................................... 35

 

Software Reset Register, Address 0x10 .................................... 35

 

Outline Dimensions ....................................................................... 36

 

Ordering Guide .......................................................................... 36

 

REVISION HISTORY

7/11—Revision 0: Initial Version