AD1985 datasheet(2/48 Pages) AD

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AD1985

Rev. A | Page 2 of 48

TABLE OF CONTENTS

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

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

Analog Input ................................................................................. 4

Master Volume .............................................................................. 4

Programmable Gain Amplifier—ADC...................................... 4

Analog Mixer—Input Gain/Amplifiers/Attenuators............... 5

Digital Decimation and Interpolation Filters ........................... 5

Analog-to-Digital Converters..................................................... 5

Digital-to-Analog Converters..................................................... 5

Analog Output .............................................................................. 6

Static Digital Specifications......................................................... 6

Power Supply................................................................................. 6

Power-Down States ...................................................................... 7

Clock Specifications ..................................................................... 7

Timing Parameters ....................................................................... 8

Absolute Maximum Ratings.......................................................... 10

Environmental Conditions........................................................ 10

ESD Caution................................................................................ 10

Pin Configuration and Functional Descriptions........................ 11

Pin Descriptions ......................................................................... 11

Indexed Control Registers......................................................... 13

Outline Dimensions ....................................................................... 47

Ordering Guide........................................................................... 47

REVISION HISTORY

3/04—Data Sheet changed from Rev. 0 to Rev. A

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

Changes to Figure 1......................................................................... 1

Changes to Figure 2......................................................................... 3

Changes to Table 4........................................................................... 4

Changes to Tables 5, 7, and 8.......................................................... 5

Changes to Table 12 ........................................................................ 7

Changes to Pin Configuration ..................................................... 11

Changes to Circuit Layout Note .................................................. 11

Changes to Indexed Control Registers ....................................... 13

Changes to Master Volume Register (Index 0x02).................... 15

Changes to Headphone Volume Register (Index 0x04) ........... 16

Changes to Mono Volume Register (Index 0x06) ..................... 17

Changes to PC Beep Register (Index 0x0A) .............................. 18

Changes to Microphone Volume Register (Index 0x0E).......... 19

Changes to AUX In Volume Register (Index 0x16) .................. 21

Changes to Record Select Control Register (Index 0x1A)....... 22

Changes to Record Gain Register (Index 0x1C) ....................... 23

Changes to Extended Audio ID Register (Index 0x28) ............ 27

Changes to Center/LFE Volume Control

Changes to Surround Volume Control Register

(Index 0x38) ................................................................................... 31

Changes to Jack Sense/Audio Interrupt/Status Register

(Index 0x72) ................................................................................... 36

Changes to Miscellaneous Control Bits (Index 0x76) .............. 39

Changes to Advanced Jack Sense Register (Index 0x78).......... 41

Updated Outline Dimensions...................................................... 47

Updated Ordering Guide.............................................................. 47

3/03—Revision 0: Initial Version

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