AD1981B

Rev. C | Page 2 of 32

TABLE OF CONTENTS

Specifications..................................................................................... 3

Test Conditions............................................................................. 3

General Specifications ................................................................. 3

Power-Down States ...................................................................... 5

Timing Parameters ....................................................................... 5

Absolute Maximum Ratings............................................................ 9

Environmental Conditions.......................................................... 9

Pin Configuration and Function Descriptions........................... 10

Indexed Control Registers ............................................................. 12

Control Register Details ................................................................ 13

Reset Register .............................................................................. 13

Master Volume Register............................................................. 13

Headphone Volume Register .................................................... 14

Mono Volume Register .............................................................. 15

Phone Volume Register.............................................................. 15

MIC Volume Register................................................................. 16

Line-In Volume Register............................................................ 16

CD Volume Register................................................................... 17

AUX Volume Register ................................................................ 17

PCM-Out Volume Register....................................................... 18

Record Select Control Register................................................. 19

Record Gain Register ................................................................. 19

General-Purpose Register ......................................................... 20

Power-Down Control/Status Register ..................................... 21

Extended Audio ID Register ..................................................... 22

Extended Audio Status and Control Register ......................... 22

PCM Front DAC Rate Register................................................. 23

PCM ADC Rate Register ........................................................... 23

SPDIF Control Register ............................................................. 24

EQ Control Register................................................................... 24

EQ Data Register ........................................................................ 26

Mixer ADC, Input Gain Register ............................................. 26

Jack Sense/Audio Interrupt/Status Register............................ 27

Serial Configuration Register ................................................... 29

Miscellaneous Control Bit Register ......................................... 29

Vendor ID Registers................................................................... 31

Outline Dimensions ....................................................................... 32

Ordering Guide .......................................................................... 32

REVISION HISTORY

1/05—Rev. B to Rev. C

Updated Format..................................................................Universal

Changes to Ordering Guide .......................................................... 32

6/03—Rev. A to Rev. B

Changes to TIMING PARAMETERS............................................ 4

Changes to ENVIRONMENTAL CONDITIONS ....................... 7

Changes to ORDERING GUIDE ................................................... 7

Updated OUTLINE DIMENSIONS ............................................ 27

2/03—Rev. 0 to Rev. A

Changes to FUNCTIONAL BLOCK DIAGRAM .........................1

Changes to SPECIFICATIONS .......................................................2

Changes to TIMING PARAMETERS.............................................4

Change to Figure 6 Caption .............................................................6

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10/02—Revision 0: Initial Version