NAU8315 Datasheet Rev1.5

Page 3 of 43

Mar 30, 2020

1

Contents

1

CONTENTS.................................................................................................................................... 3

1.1

List of Figures .........................................................................................................................................5

1.2

List of Tables ..........................................................................................................................................5

2

GENERAL DESCRIPTION ............................................................................................................ 6

3

PIN CONFIGURATIONS................................................................................................................ 7

4

PIN DESCRIPTIONS ................................................................................................................... 10

5

SYSTEM DIAGRAM..................................................................................................................... 11

5.1

Reference System Diagram.................................................................................................................. 11

6

BLOCK DIAGRAM ....................................................................................................................... 12

7

ELECTRICAL CHARACTERISTICS ............................................................................................ 13

7.1

Absolute Maximum Ratings .................................................................................................................. 13

7.2

Operating Conditions ............................................................................................................................ 13

7.3

Electrical Parameters............................................................................................................................ 13

7.4

Digital Input Parameters ....................................................................................................................... 15

7.5

Typical Operating Plots......................................................................................................................... 16

8

FUNCTIONAL DESCRIPTION..................................................................................................... 20

8.1

Inputs.................................................................................................................................................... 20

8.2

Outputs ................................................................................................................................................. 21

8.3

Digital Interfaces................................................................................................................................... 22

8.4

Power Supply ....................................................................................................................................... 22

8.5

Power-On-and-Off Reset ...................................................................................................................... 23

8.6

Power Up & Down Sequence ............................................................................................................... 23

8.7

Clocking and Sample Rates ................................................................................................................. 24

8.7.1

Clock Control and Detection.......................................................................................................... 24

8.7.2

Automatic Power Control and Mute. .............................................................................................. 24

8.7.3

Input Clock Rates .......................................................................................................................... 25

8.7.4

Sample and Over Sampling Rates ................................................................................................ 26

8.8

Automatic Level Control........................................................................................................................ 28

8.8.1

ALC Operation............................................................................................................................... 28

8.8.2

ALC Parameter Definitions ............................................................................................................ 28

8.9

Device Protection ................................................................................................................................. 30

8.10

Power-up and Power-Down Control ..................................................................................................... 30

8.11

Bypass Capacitors................................................................................................................................ 30

8.12

Printed Circuit Board Layout Considerations ........................................................................................ 30

8.12.1

PCB Layout Notes ......................................................................................................................... 31

8.13

Filters.................................................................................................................................................... 31

8.13.1

Class D without Filters................................................................................................................... 31