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Analog Devices Semiconductor Electronic Components Datasheet



AD1986

SoundMAX CODEC


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FEATURES
AC `97 2.3 COMPLIANT FEATURES
6 DAC channels for 5.1 surround
S/PDIF output
Integrated headphone amplifiers
Variable rate audio
Double rate audio (Fs = 96 kHz)
Greater than 90 dB dynamic range
20-bit resolution on all DACs
20-bit resolution on all ADCs
Line-level mono phone input
High quality CD input
Selectable MIC input w/preamp
AUX and line-in stereo inputs
External amplifier power down (EAPD)
Power management modes
Jack sensing and device identification
48-pin LQFP package
AC ’97 SoundMAX CODEC
AD1986
ENHANCED FEATURES
Integrated parametric equalizer
Stereo microphone with up to 30 dB gain boost
Integrated PLL for system clocking
Variable sample rate: 7 kHz to 96 kHz
7 kHz to 48 kHz in 1 Hz increments
96 kHz for double rate audio
Jack sense with auto topology switching
Jack presence detection on up to 8 jacks
Three software-controlled VREF_OUT signals
Software-enabled outputs for jack sharing
Auto-down mix and channel spreading
Microphone-to-mono output
Stereo microphone pass-through to mixer
Built-in microphone/center/LFE/line-in sharing
Built-in SURROUND/LINE_IN sharing
Center/LFE line swapping
Microphone swapping
Reduced support component count
General purpose digital output pin (GPO)
Separate LINE_OUT and HP_OUT pins
Headphone drivers on LINE_OUT and HP_OUT pins
Independent headphone/LINE_OUT operation
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
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Tel: 781.329.4700
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Fax: 781.326.8703 © 2004 Analog Devices, Inc. All rights reserved.



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AD1986
TABLE OF CONTENTS
Functional Block Diagram .............................................................. 4
Specifications..................................................................................... 5
AC ’97 Timing Parameters .......................................................... 9
Absolute Maximum Ratings.......................................................... 12
Environmental Conditions........................................................ 12
ESD Caution................................................................................ 12
Pin Configuration And Function Description ........................... 13
AC ’97 Registers .............................................................................. 15
Register Details ............................................................................... 17
Reset (Register 0x00).................................................................. 17
Master Volume (Register 0x02) ................................................ 17
Headphone Volume (Register 0x04)........................................ 18
Mono Volume (Register 0x06).................................................. 18
PC Beep (Register 0x0A)........................................................... 19
Phone Volume (Register 0x0C) ................................................ 19
Microphone Volume (Register 0x0E) ...................................... 20
Line In Volume (Register 0x10)................................................ 21
CD Volume (Register 0x12) ...................................................... 21
AUX Volume (Register 0x16) ................................................... 22
Front DAC Volume (Register 0x18)......................................... 22
ADC Select (Register 0x1A)...................................................... 23
ADC Volume (Register 0x1C) .................................................. 24
General-Purpose (Register 0x20)............................................. 25
Audio Int and Paging (Register 0x24) ..................................... 25
Power-Down Ctrl/Stat (Register 0x26).................................... 26
Ext’d Audio ID (Register 0x28)................................................. 27
Ext’d Audio Stat/Ctrl (Register 0x2A)...................................... 28
Front DAC PCM Rate (Register 0x2C) ................................... 29
Surround DAC PCM Rate (Register 0x2E) ............................ 30
C/LFE DAC PCM Rate (Register 0x30) .................................. 30
ADC PCM Rate (Register 0x32) .............................................. 30
C/LFE DAC Volume (Register 0x36)....................................... 31
Surround DAC Volume (Register 0x38) ................................. 31
SPDIF Control (Register 0x3A)................................................ 32
EQ Control Register (Register 0x60) ....................................... 33
EQ Data Register (Register 0x62) ............................................ 34
Misc Control Bits 2 (Register 0x70)......................................... 34
Jack Sense (Register 0x72)......................................................... 35
Serial Configuration (Register 0x74)....................................... 37
Misc Control Bits 1 (Register 0x76)......................................... 39
Advanced Jack Sense (Register 0x78) ...................................... 40
Misc Control Bits 3 (Register 0x7A)........................................ 41
Vendor ID Registers (Register 0x7C to 0x7E) ........................ 42
CODEC Class/Revision Register (Register 0x60).................. 42
PCI Subsystem Vendor ID Register (Register 0x62, Page 01)
....................................................................................................... 43
PCI Subsystem Device ID Register (Register 0x64, Page 01)43
Function Select Register (Register 0x66, Page 01)................. 43
Information and I/O Register (Register 0x68, Page 01)........ 44
Sense Register (Register 0x6A, Page 01) ................................. 46
Jack Presence Detection................................................................. 48
Audio Jack Styles (NC/NO) ...................................................... 48
Microphone Selection/Mixing...................................................... 49
Outline Dimensions ....................................................................... 50
Ordering Guide .......................................................................... 50
REVISION HISTORY
10/04—Initial Version: Revision 0
DataSheet4 U .com
Rev. 0 | Page 2 of 52



Part Number AD1986
Description SoundMAX CODEC
Maker Analog Devices - Analog Devices
Total Page 30 Pages
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