AD1987 데이터 시트보기 (PDF) - Analog Devices
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AD1987 Datasheet PDF : 20 Pages
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AD1987
GENERAL DESCRIPTION
The AD1987 audio codec and SoundMAX® software provides
Table 2. Retasking to Support 7.1 Audio on 5 Jacks
superior HD audio quality that exceeds Vista Premium perfor-
mance. The AD1987 has eight DACs and four ADCs, three
Port
HP MIC LO LI
stereo headphone ports, C/LFE swapping, digital and analog
Port A – Front Panel Headphone
xxxx
PCBeep, and S/PDIF output, making the AD1987 the right
Port B – Front Panel Microphone
xxxx
choice for desktop PCs where performance is the primary
Port C – Rear Panel Line-In/Surround-
xxx
consideration.
Center/Side (7.1)
The jack retasking feature on this product supports various con-
Port D – Rear Panel Front/Headphone x
xx
figurations including platforms for 7.1 on 5 jacks, 5.1 on 3 jacks,
Port E – Rear Panel Microphone
xxx
and front panel jack retasking.
Port F – Rear Panel Surround-Rear (5.1)
x
The AD1987 is available in a 48-lead Pb-free frame chip scale
package in both reels and trays. See Ordering Guide on Page 17.
ADDITIONAL INFORMATION
This data sheet provides a general overview of the AD1987
E SoundMAX codec’s architecture and functionality. Additional
information on the AD1987 is available in the AD1987 Pro-
grammers Reference Manual. Please contact your local Analog
T Devices Inc. sales representative for more information. For
information on SoundMAX codecs and software, see Analog
Devices website at http://www.analog.com/soundMAX.
E JACK CONFIGURATION
The guidelines shown in Table 1 through Table 3 should be
used when selecting ports for particular functions. The symbols
used in this table are defined as: LI = line level input, LO = line
L level output, HP = output capable of driving headphone load,
MIC = input supports microphones with MIC bias and boost
amplifier.
O Table 1. Desktop Applications with Discrete Jacks (Default
Configuration)
Port
HP MIC LO LI
S Port A – Front Panel Headphone
xxxx
Port B – Front Panel Microphone
xxxx
Port C – Rear Panel Line-In
xxx
Port D – Rear Panel Front/Headphone x
xx
B Port E – Rear Panel Microphone
xxx
Port F – Rear Panel Surround-Rear (5.1)
x
Port G – Rear Panel C/LFE
x
Port H – Rear Panel Surround-
x
O Center/Side (7.1)
Port G – Rear Panel C/LFE
x
Table 3. Desktop Applications with Retasking to Support 5.1
Audio on 3 Jacks
Port
HP MIC LO LI
Port A – Front Panel Headphone
xxxx
Port B – Front Panel Microphone
xxxx
Port C – Rear Panel Line-In/Surround-Rear
xxx
(5.1)
Port D – Rear Panel Front/Headphone x
xx
Port E – Rear Panel Microphone /C/LFE
xxx
Rev. A | Page 3 of 20 | March 2008
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