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AD1981HD

HD Audio SoundMAX Codec


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AD1981HD pdf
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HD Audio SoundMAX® Codec
AD1981HD
FEATURES
ENHANCED FEATURES
2 DAC channels: 16-, 20-, or 24-bit
No AFILT pins, results in BOM savings
2 ADC channels: 16- or 20-bit
HD audio sample rates
5.0 V AVDD supply, 3.3 V DVDD supply
Jack-sensing autoconfiguration options
8 kHz, 11.025 kHz, 16 kHz, 22.05 kHz, 32 kHz,
44.1 kHz, 48 kHz
Mute line output and monaural output (MONO_OUT)
when headphones are used
Greater than 90 dB dynamic range
Mute MONO_OUT when a device is in the line out jack
S/PDIF output: 32 kHz, 44.1 kHz or 48 kHz, 16- or 24-bit
Selectable trip level: high/low supports all jack types
Digital beep and analog PC beep pass-through
Peripheral identification/enumeration
Integrated headphone amplifiers on two ports
Jack event/presence detection using SENSE or GPIO pins
Port retasking
Microphone to MONO_OUT for speakerphone applications
Selectable microphone and line inputs
Advanced power management modes
Full analog mixer
4 software-controlled microphone bias pins
Legacy inputs: CD and auxiliary inputs
Up to 30 dB microphone boost
External amplifier power-down (EAPD)
4 GPIOs—external control or traditional jack sense
48-pin, Pb-free LQFP
FUNCTIONAL BLOCK DIAGRAM
GPIO
GPIO
AVDD
AVSS
5V
PC BEEP
RESET
JACK
SENSE
SENSE
Σ GAM
MONO_OUT
PCM/AC3
S/PDIF TX
EQ PCM
Σ-Δ DAC
PC BEEP
DIGITAL
PC BEEP
S/PDIF_OUT
PC BEEP
GM
GA
GA
M
M
Σ
MMM
MM
GA GA GA
GA GA
GAM
HP
MIC
BIAS
Z
GAM
HP
BOOST
Z
MIC
BIAS
GAM
BOOST
Z
Z
PORT-A
HEADPHONE
MIC_BIAS-D
PORT-D
LINE_OUT
MIC_BIAS-C
PORT-C
LINE_IN
PCM/FLOAT32
Σ-Δ ADC
MG
DIFF
AMP
MIC
BIAS
Z
GAM
Z
BOOST
M
MIC
BIAS
Z
M
BOOST
MIC_BIAS-F
PORT-F
REAR MIC
MIC_BIAS-B
PORT-B
FRONT MIC
Figure 1.
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 © 2005 Analog Devices, Inc. All rights reserved.



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AD1981HD pdf
AD1981HD
TABLE OF CONTENTS
Functional Block Diagram Details ................................................. 3
Specifications..................................................................................... 4
Absolute Maximum Ratings............................................................ 7
Environmental Conditions.......................................................... 7
ESD Caution.................................................................................. 7
Pin Configuration and Function Descriptions............................. 8
REVISION HISTORY
6/05—Initial Version: Revision 0
HD Audio Codec Information ..................................................... 10
Jack Presence Detection................................................................. 15
HD Audio Style Jack Presence Detection ............................... 15
Classic Jack Presence Detection ............................................... 15
Outline Dimensions ....................................................................... 16
Ordering Guide .......................................................................... 16
Rev. 0 | Page 2 of 16



Part Number AD1981HD
Description HD Audio SoundMAX Codec
Maker Analog Devices - Analog Devices
Total Page 16 Pages
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